TY  - JOUR
AU  - Kovačević, Aleksander
AU  - Ristić-Đurović, Jasna L.
AU  - Lekic, Marina
AU  - Hadžić, Branka B.
AU  - Abudagel, Giuma Saleh Isa
AU  - Petričević, Slobodan
AU  - Mihailovic, Pedja
AU  - Matović, Branko
AU  - Dramlić, Dragan M.
AU  - Brajovic, Ljiljana M.
AU  - Romčević, Nebojša Ž.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1235
AB  - High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties
VL  - 83
SP  - 284
EP  - 289
DO  - 10.1016/j.materresbull.2016.06.023
ER  - 

@article{
author = "Kovačević, Aleksander and Ristić-Đurović, Jasna L. and Lekic, Marina and Hadžić, Branka B. and Abudagel, Giuma Saleh Isa and Petričević, Slobodan and Mihailovic, Pedja and Matović, Branko and Dramlić, Dragan M. and Brajovic, Ljiljana M. and Romčević, Nebojša Ž.",
year = "2016",
abstract = "High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties",
volume = "83",
pages = "284-289",
doi = "10.1016/j.materresbull.2016.06.023"
}

Kovačević, A., Ristić-Đurović, J. L., Lekic, M., Hadžić, B. B., Abudagel, G. S. I., Petričević, S., Mihailovic, P., Matović, B., Dramlić, D. M., Brajovic, L. M.,& Romčević, N. Ž.. (2016). Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin, 83, 284-289.
https://doi.org/10.1016/j.materresbull.2016.06.023

Kovačević A, Ristić-Đurović JL, Lekic M, Hadžić BB, Abudagel GSI, Petričević S, Mihailovic P, Matović B, Dramlić DM, Brajovic LM, Romčević NŽ. Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin. 2016;83:284-289.
doi:10.1016/j.materresbull.2016.06.023 .

Kovačević, Aleksander, Ristić-Đurović, Jasna L., Lekic, Marina, Hadžić, Branka B., Abudagel, Giuma Saleh Isa, Petričević, Slobodan, Mihailovic, Pedja, Matović, Branko, Dramlić, Dragan M., Brajovic, Ljiljana M., Romčević, Nebojša Ž., "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties" in Materials Research Bulletin, 83 (2016):284-289,
https://doi.org/10.1016/j.materresbull.2016.06.023 . .

TY  - JOUR
AU  - Trajić, Jelena
AU  - Rabasović, Maja S.
AU  - Savić-Šević, Svetlana N.
AU  - Šević, Dragutin M.
AU  - Babić, Biljana M.
AU  - Romčević, Maja J.
AU  - Ristić-Đurović, Jasna L.
AU  - Paunović, Novica M.
AU  - Križan, Janez
AU  - Romčević, Nebojša Ž.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1210
AB  - The solution combustion synthesis was used to prepare nanopowders of yttrium aluminum garnet (YAG) and YAG doped with dysprosium ions, Dy3+, (YAG:Dy). The morphology, specific surface area, texture, and optical properties of the prepared materials were studied by the means of scanning electron microscopy (SEM), nitrogen adsorption method, and far-infrared spectroscopy at room temperature in the spectral region between 80 and 600 cm(-1). It was established that all the examined samples were microporous. The Maxwell-Garnet formula was used to model dielectric function of YAG and YAG:Dy nanopowders as mixtures of homogenous spherical inclusions in air. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Infrared Physics and Technology
T1  - Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder
VL  - 77
SP  - 226
EP  - 229
DO  - 10.1016/j.infrared.2016.06.003
ER  - 

@article{
author = "Trajić, Jelena and Rabasović, Maja S. and Savić-Šević, Svetlana N. and Šević, Dragutin M. and Babić, Biljana M. and Romčević, Maja J. and Ristić-Đurović, Jasna L. and Paunović, Novica M. and Križan, Janez and Romčević, Nebojša Ž.",
year = "2016",
abstract = "The solution combustion synthesis was used to prepare nanopowders of yttrium aluminum garnet (YAG) and YAG doped with dysprosium ions, Dy3+, (YAG:Dy). The morphology, specific surface area, texture, and optical properties of the prepared materials were studied by the means of scanning electron microscopy (SEM), nitrogen adsorption method, and far-infrared spectroscopy at room temperature in the spectral region between 80 and 600 cm(-1). It was established that all the examined samples were microporous. The Maxwell-Garnet formula was used to model dielectric function of YAG and YAG:Dy nanopowders as mixtures of homogenous spherical inclusions in air. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Infrared Physics and Technology",
title = "Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder",
volume = "77",
pages = "226-229",
doi = "10.1016/j.infrared.2016.06.003"
}

Trajić, J., Rabasović, M. S., Savić-Šević, S. N., Šević, D. M., Babić, B. M., Romčević, M. J., Ristić-Đurović, J. L., Paunović, N. M., Križan, J.,& Romčević, N. Ž.. (2016). Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder. in Infrared Physics and Technology, 77, 226-229.
https://doi.org/10.1016/j.infrared.2016.06.003

Trajić J, Rabasović MS, Savić-Šević SN, Šević DM, Babić BM, Romčević MJ, Ristić-Đurović JL, Paunović NM, Križan J, Romčević NŽ. Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder. in Infrared Physics and Technology. 2016;77:226-229.
doi:10.1016/j.infrared.2016.06.003 .

Trajić, Jelena, Rabasović, Maja S., Savić-Šević, Svetlana N., Šević, Dragutin M., Babić, Biljana M., Romčević, Maja J., Ristić-Đurović, Jasna L., Paunović, Novica M., Križan, Janez, Romčević, Nebojša Ž., "Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder" in Infrared Physics and Technology, 77 (2016):226-229,
https://doi.org/10.1016/j.infrared.2016.06.003 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, Sasa
AU  - Ilić, Anđelija Z.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5561
AB  - A quadrupole with equally charged electrodes could be used to focus as well as to accelerate ion beams. The equality of electrode charges causes the driving electric field of this device to be qualitatively different from that of other devices with a similar structure composed of four rod-like electrodes. For the same reason, the area of strong field influence on the beam is shifted towards the entrance and exit of the device. Consequently, it is expected that the devices performance depends on the shapes of its entrance and exit regions. The device parameters whose influence is studied are aperture radius, gap size, and rod length. Performance of the device is quantified with accelerating and focusing potentials, which are obtained as integrals of axial and radial electric fields. These variables are further used to choose optimal values of the device parameters for desired operation of the device.
T2  - IEEE Transactions on Nuclear Science
T1  - Optimization of Equally Charged Quadrupole Parameters
VL  - 60
IS  - 3
SP  - 2161
EP  - 2169
DO  - 10.1109/TNS.2013.2253618
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Cirkovic, Sasa and Ilić, Anđelija Z.",
year = "2013",
abstract = "A quadrupole with equally charged electrodes could be used to focus as well as to accelerate ion beams. The equality of electrode charges causes the driving electric field of this device to be qualitatively different from that of other devices with a similar structure composed of four rod-like electrodes. For the same reason, the area of strong field influence on the beam is shifted towards the entrance and exit of the device. Consequently, it is expected that the devices performance depends on the shapes of its entrance and exit regions. The device parameters whose influence is studied are aperture radius, gap size, and rod length. Performance of the device is quantified with accelerating and focusing potentials, which are obtained as integrals of axial and radial electric fields. These variables are further used to choose optimal values of the device parameters for desired operation of the device.",
journal = "IEEE Transactions on Nuclear Science",
title = "Optimization of Equally Charged Quadrupole Parameters",
volume = "60",
number = "3",
pages = "2161-2169",
doi = "10.1109/TNS.2013.2253618"
}

Ristić-Đurović, J. L., Cirkovic, S.,& Ilić, A. Z.. (2013). Optimization of Equally Charged Quadrupole Parameters. in IEEE Transactions on Nuclear Science, 60(3), 2161-2169.
https://doi.org/10.1109/TNS.2013.2253618

Ristić-Đurović JL, Cirkovic S, Ilić AZ. Optimization of Equally Charged Quadrupole Parameters. in IEEE Transactions on Nuclear Science. 2013;60(3):2161-2169.
doi:10.1109/TNS.2013.2253618 .

Ristić-Đurović, Jasna L., Cirkovic, Sasa, Ilić, Anđelija Z., "Optimization of Equally Charged Quadrupole Parameters" in IEEE Transactions on Nuclear Science, 60, no. 3 (2013):2161-2169,
https://doi.org/10.1109/TNS.2013.2253618 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, Sasa
AU  - Ilić, Anđelija Z.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5560
AB  - The electrostatic quadrupole lens, quadrupole accelerator and square rainbow lens as well as radio frequency quadrupole accelerator all have similar structure with four rod-like electrodes. Unlike the last one, which is powered by the alternating voltage, the first three are electrostatic devices. Each two adjacent electrodes of a common electrostatic lens have equal magnitude and opposite signs of their electric potentials, whereas, electric potentials of rainbow lenss electrodes are all equal in magnitude as well as in sign. If powered by the appropriate radio frequency instead of a DC voltage, the rainbow lens transforms into an ion beam accelerator which could cost-effectively broaden the available energy range of low energy ion beam facilities.
T2  - IEEE Transactions on Nuclear Science
T1  - Ion Beam Acceleration With Radio Frequency Powered Rainbow Lens
VL  - 60
IS  - 2
SP  - 1272
EP  - 1279
DO  - 10.1109/TNS.2012.2230452
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Cirkovic, Sasa and Ilić, Anđelija Z.",
year = "2013",
abstract = "The electrostatic quadrupole lens, quadrupole accelerator and square rainbow lens as well as radio frequency quadrupole accelerator all have similar structure with four rod-like electrodes. Unlike the last one, which is powered by the alternating voltage, the first three are electrostatic devices. Each two adjacent electrodes of a common electrostatic lens have equal magnitude and opposite signs of their electric potentials, whereas, electric potentials of rainbow lenss electrodes are all equal in magnitude as well as in sign. If powered by the appropriate radio frequency instead of a DC voltage, the rainbow lens transforms into an ion beam accelerator which could cost-effectively broaden the available energy range of low energy ion beam facilities.",
journal = "IEEE Transactions on Nuclear Science",
title = "Ion Beam Acceleration With Radio Frequency Powered Rainbow Lens",
volume = "60",
number = "2",
pages = "1272-1279",
doi = "10.1109/TNS.2012.2230452"
}

Ristić-Đurović, J. L., Cirkovic, S.,& Ilić, A. Z.. (2013). Ion Beam Acceleration With Radio Frequency Powered Rainbow Lens. in IEEE Transactions on Nuclear Science, 60(2), 1272-1279.
https://doi.org/10.1109/TNS.2012.2230452

Ristić-Đurović JL, Cirkovic S, Ilić AZ. Ion Beam Acceleration With Radio Frequency Powered Rainbow Lens. in IEEE Transactions on Nuclear Science. 2013;60(2):1272-1279.
doi:10.1109/TNS.2012.2230452 .

Ristić-Đurović, Jasna L., Cirkovic, Sasa, Ilić, Anđelija Z., "Ion Beam Acceleration With Radio Frequency Powered Rainbow Lens" in IEEE Transactions on Nuclear Science, 60, no. 2 (2013):1272-1279,
https://doi.org/10.1109/TNS.2012.2230452 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Ilić, Anđelija Z.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5309
AB  - Dynamics of an ensemble of particles is often studied by tracking a large number of test particles from a chosen initial state to an adequately defined final state. Random distributions of particles over considered parameters are frequently used to describe an initial state of studied ensemble. Randomness of input data insures that there is no overlapping in test particles visualization; however, it hides the dependencies between various input and output parameters. If non-random, uniformly distributed input data is used, relationships between the input and output variables are revealed. Further, mapping of such an input into its output together with an appropriate interpolation scheme contains description of an output corresponding to any desired distribution of input data. A mapping of non-random uniformly distributed input into its output is combined with n-dimensional linear interpolation into a method for studying dynamics of an ensemble of particles. Advantages and efficiency of the method are illustrated using an ion beam interaction with two devices: the four parallel, equally spaced finite wires and the spiral inflector. The method is applicable if interactions between particles within an ensemble are negligible compared to other forces involved.
T2  - IEEE Transactions on Nuclear Science
T1  - Role and Significance of Uniform Distribution in a Study of Ensemble of Particles
VL  - 60
IS  - 1
SP  - 236
EP  - 245
DO  - 10.1109/TNS.2012.2225153
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Ilić, Anđelija Z.",
year = "2013",
abstract = "Dynamics of an ensemble of particles is often studied by tracking a large number of test particles from a chosen initial state to an adequately defined final state. Random distributions of particles over considered parameters are frequently used to describe an initial state of studied ensemble. Randomness of input data insures that there is no overlapping in test particles visualization; however, it hides the dependencies between various input and output parameters. If non-random, uniformly distributed input data is used, relationships between the input and output variables are revealed. Further, mapping of such an input into its output together with an appropriate interpolation scheme contains description of an output corresponding to any desired distribution of input data. A mapping of non-random uniformly distributed input into its output is combined with n-dimensional linear interpolation into a method for studying dynamics of an ensemble of particles. Advantages and efficiency of the method are illustrated using an ion beam interaction with two devices: the four parallel, equally spaced finite wires and the spiral inflector. The method is applicable if interactions between particles within an ensemble are negligible compared to other forces involved.",
journal = "IEEE Transactions on Nuclear Science",
title = "Role and Significance of Uniform Distribution in a Study of Ensemble of Particles",
volume = "60",
number = "1",
pages = "236-245",
doi = "10.1109/TNS.2012.2225153"
}

Ristić-Đurović, J. L.,& Ilić, A. Z.. (2013). Role and Significance of Uniform Distribution in a Study of Ensemble of Particles. in IEEE Transactions on Nuclear Science, 60(1), 236-245.
https://doi.org/10.1109/TNS.2012.2225153

Ristić-Đurović JL, Ilić AZ. Role and Significance of Uniform Distribution in a Study of Ensemble of Particles. in IEEE Transactions on Nuclear Science. 2013;60(1):236-245.
doi:10.1109/TNS.2012.2225153 .

Ristić-Đurović, Jasna L., Ilić, Anđelija Z., "Role and Significance of Uniform Distribution in a Study of Ensemble of Particles" in IEEE Transactions on Nuclear Science, 60, no. 1 (2013):236-245,
https://doi.org/10.1109/TNS.2012.2225153 . .

TY  - JOUR
AU  - Cirkovic, Sasa
AU  - Ilić, Anđelija Z.
AU  - Dobrosavljević, Aleksandar S.
AU  - Balvanović, Roman V.
AU  - Ristić-Đurović, Jasna L.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4862
AB  - Systematic errors caused by the deficiencies of the measurement equipment are occurring relatively often in the engineering practice. The magnetic field measurement system of the VINCY Cyclotron has been designed well; however, due to the practical limitations in the machining process fabrication errors are imminent. We present our experiences with the produced measurement system and the techniques used for the detection and correction of errors. A change in the measuring protocol is suggested in order to overcome otherwise unavoidable errors caused by measuring system machining imperfections. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Minimization of the measurement errors induced by the cyclotron magnetic field measurement system
VL  - 679
SP  - 54
EP  - 60
DO  - 10.1016/j.nima.2012.03.018
ER  - 

@article{
author = "Cirkovic, Sasa and Ilić, Anđelija Z. and Dobrosavljević, Aleksandar S. and Balvanović, Roman V. and Ristić-Đurović, Jasna L.",
year = "2012",
abstract = "Systematic errors caused by the deficiencies of the measurement equipment are occurring relatively often in the engineering practice. The magnetic field measurement system of the VINCY Cyclotron has been designed well; however, due to the practical limitations in the machining process fabrication errors are imminent. We present our experiences with the produced measurement system and the techniques used for the detection and correction of errors. A change in the measuring protocol is suggested in order to overcome otherwise unavoidable errors caused by measuring system machining imperfections. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Minimization of the measurement errors induced by the cyclotron magnetic field measurement system",
volume = "679",
pages = "54-60",
doi = "10.1016/j.nima.2012.03.018"
}

Cirkovic, S., Ilić, A. Z., Dobrosavljević, A. S., Balvanović, R. V.,& Ristić-Đurović, J. L.. (2012). Minimization of the measurement errors induced by the cyclotron magnetic field measurement system. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 679, 54-60.
https://doi.org/10.1016/j.nima.2012.03.018

Cirkovic S, Ilić AZ, Dobrosavljević AS, Balvanović RV, Ristić-Đurović JL. Minimization of the measurement errors induced by the cyclotron magnetic field measurement system. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2012;679:54-60.
doi:10.1016/j.nima.2012.03.018 .

Cirkovic, Sasa, Ilić, Anđelija Z., Dobrosavljević, Aleksandar S., Balvanović, Roman V., Ristić-Đurović, Jasna L., "Minimization of the measurement errors induced by the cyclotron magnetic field measurement system" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 679 (2012):54-60,
https://doi.org/10.1016/j.nima.2012.03.018 . .

TY  - JOUR
AU  - Ilić, Anđelija Z.
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, Sasa
AU  - Nešković, Nebojša B.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4805
AB  - A novel method for efficient analysis of ion beam acceleration in an isochronous cyclotron is proposed. Numerical simulation is used to perform multiple beam dynamics analyses on the conveniently chosen subsets of data; consequently, the total quantity of studied data is significantly reduced. The obtained results provide direct insight into beam behavior and quality of acceleration. Therefore, the analysis is not only efficient, but detailed and systematic as well. It is used to assess the impact of the accelerated orbit optimization to the enhancement of acceleration efficiency when study is extended from a single test ion to the complete ion beam consideration.
T2  - IEEE Transactions on Nuclear Science
T1  - Enhancement of Ion Beam Acceleration Efficiency in Isochronous Cyclotrons
VL  - 59
IS  - 2
SP  - 272
EP  - 280
DO  - 10.1109/TNS.2011.2180737
ER  - 

@article{
author = "Ilić, Anđelija Z. and Ristić-Đurović, Jasna L. and Cirkovic, Sasa and Nešković, Nebojša B.",
year = "2012",
abstract = "A novel method for efficient analysis of ion beam acceleration in an isochronous cyclotron is proposed. Numerical simulation is used to perform multiple beam dynamics analyses on the conveniently chosen subsets of data; consequently, the total quantity of studied data is significantly reduced. The obtained results provide direct insight into beam behavior and quality of acceleration. Therefore, the analysis is not only efficient, but detailed and systematic as well. It is used to assess the impact of the accelerated orbit optimization to the enhancement of acceleration efficiency when study is extended from a single test ion to the complete ion beam consideration.",
journal = "IEEE Transactions on Nuclear Science",
title = "Enhancement of Ion Beam Acceleration Efficiency in Isochronous Cyclotrons",
volume = "59",
number = "2",
pages = "272-280",
doi = "10.1109/TNS.2011.2180737"
}

Ilić, A. Z., Ristić-Đurović, J. L., Cirkovic, S.,& Nešković, N. B.. (2012). Enhancement of Ion Beam Acceleration Efficiency in Isochronous Cyclotrons. in IEEE Transactions on Nuclear Science, 59(2), 272-280.
https://doi.org/10.1109/TNS.2011.2180737

Ilić AZ, Ristić-Đurović JL, Cirkovic S, Nešković NB. Enhancement of Ion Beam Acceleration Efficiency in Isochronous Cyclotrons. in IEEE Transactions on Nuclear Science. 2012;59(2):272-280.
doi:10.1109/TNS.2011.2180737 .

Ilić, Anđelija Z., Ristić-Đurović, Jasna L., Cirkovic, Sasa, Nešković, Nebojša B., "Enhancement of Ion Beam Acceleration Efficiency in Isochronous Cyclotrons" in IEEE Transactions on Nuclear Science, 59, no. 2 (2012):272-280,
https://doi.org/10.1109/TNS.2011.2180737 . .

TY  - JOUR
AU  - Djordjevich, Drago M.
AU  - De Luka, Silvio R.
AU  - Milovanović, Ivan D.
AU  - Janković, Saša
AU  - Stefanovic, Srdjan
AU  - Veskovic-Moracanin, Slavica
AU  - Cirkovic, Sasa
AU  - Ilić, Anđelija Z.
AU  - Ristić-Đurović, Jasna L.
AU  - Trbovich, Alexander M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4920
AB  - Static magnetic fields (SMFs) are time independent fields whose intensity can be spatially dependent. This study investigates influence of subchronic continuous exposure to upward and downward directed SMF on hematological parameters and spleen cellularity in mice. The experiment is performed on the Northern hemisphere; consequently, the vertical component of geomagnetic field is directed downward. Male, Swiss-Webster, 6 weeks old mice were exposed to the vertically declining SMF. Mice were divided in three groups and continuously exposed or not exposed for 28 days to the SMF characterized by the averaged field of 16 mT and averaged field gradient of 10 mT/cm. Differently oriented SMF did not alter hemoglobin and hematocrit content among the groups. However, the groups exposed to the upward and downward fields had statistically significant higher levels of serum transferrin compared to the control. Moreover, spleen cellularity in animals in the downward group was significantly higher compared to the upward and control group. In addition, spleen lymphocytes in both of the exposed groups were significantly higher than in the control group. In contrast, spleen granulocytes in the exposed groups were significantly lower than in the control group. Significant decrease was also observed in brain and liver iron content with concomitant increase of iron in serum and spleen in exposed animals. Subchronic continuous exposure to 16 mT SMF caused lymphocyte and granulocyte redistribution between spleen and blood. This distribution is typical for stress induced hematological changes. These results suggest that observed changes were not due to an unspecific stress response, but that they were rather caused by specific adaptation to subchronic SMF exposure. (C) 2012 Elsevier Inc. All rights reserved.
T2  - Ecotoxicology and Environmental Safety
T1  - Hematological parameters changes in mice subchronically exposed to static magnetic fields of different orientations
VL  - 81
SP  - 98
EP  - 105
DO  - 10.1016/j.ecoenv.2012.04.025
ER  - 

@article{
author = "Djordjevich, Drago M. and De Luka, Silvio R. and Milovanović, Ivan D. and Janković, Saša and Stefanovic, Srdjan and Veskovic-Moracanin, Slavica and Cirkovic, Sasa and Ilić, Anđelija Z. and Ristić-Đurović, Jasna L. and Trbovich, Alexander M.",
year = "2012",
abstract = "Static magnetic fields (SMFs) are time independent fields whose intensity can be spatially dependent. This study investigates influence of subchronic continuous exposure to upward and downward directed SMF on hematological parameters and spleen cellularity in mice. The experiment is performed on the Northern hemisphere; consequently, the vertical component of geomagnetic field is directed downward. Male, Swiss-Webster, 6 weeks old mice were exposed to the vertically declining SMF. Mice were divided in three groups and continuously exposed or not exposed for 28 days to the SMF characterized by the averaged field of 16 mT and averaged field gradient of 10 mT/cm. Differently oriented SMF did not alter hemoglobin and hematocrit content among the groups. However, the groups exposed to the upward and downward fields had statistically significant higher levels of serum transferrin compared to the control. Moreover, spleen cellularity in animals in the downward group was significantly higher compared to the upward and control group. In addition, spleen lymphocytes in both of the exposed groups were significantly higher than in the control group. In contrast, spleen granulocytes in the exposed groups were significantly lower than in the control group. Significant decrease was also observed in brain and liver iron content with concomitant increase of iron in serum and spleen in exposed animals. Subchronic continuous exposure to 16 mT SMF caused lymphocyte and granulocyte redistribution between spleen and blood. This distribution is typical for stress induced hematological changes. These results suggest that observed changes were not due to an unspecific stress response, but that they were rather caused by specific adaptation to subchronic SMF exposure. (C) 2012 Elsevier Inc. All rights reserved.",
journal = "Ecotoxicology and Environmental Safety",
title = "Hematological parameters changes in mice subchronically exposed to static magnetic fields of different orientations",
volume = "81",
pages = "98-105",
doi = "10.1016/j.ecoenv.2012.04.025"
}

Djordjevich, D. M., De Luka, S. R., Milovanović, I. D., Janković, S., Stefanovic, S., Veskovic-Moracanin, S., Cirkovic, S., Ilić, A. Z., Ristić-Đurović, J. L.,& Trbovich, A. M.. (2012). Hematological parameters changes in mice subchronically exposed to static magnetic fields of different orientations. in Ecotoxicology and Environmental Safety, 81, 98-105.
https://doi.org/10.1016/j.ecoenv.2012.04.025

Djordjevich DM, De Luka SR, Milovanović ID, Janković S, Stefanovic S, Veskovic-Moracanin S, Cirkovic S, Ilić AZ, Ristić-Đurović JL, Trbovich AM. Hematological parameters changes in mice subchronically exposed to static magnetic fields of different orientations. in Ecotoxicology and Environmental Safety. 2012;81:98-105.
doi:10.1016/j.ecoenv.2012.04.025 .

Djordjevich, Drago M., De Luka, Silvio R., Milovanović, Ivan D., Janković, Saša, Stefanovic, Srdjan, Veskovic-Moracanin, Slavica, Cirkovic, Sasa, Ilić, Anđelija Z., Ristić-Đurović, Jasna L., Trbovich, Alexander M., "Hematological parameters changes in mice subchronically exposed to static magnetic fields of different orientations" in Ecotoxicology and Environmental Safety, 81 (2012):98-105,
https://doi.org/10.1016/j.ecoenv.2012.04.025 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Nešković, Nebojša B.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4804
AB  - Accelerated ion beams are often extracted from a cyclotron by stripping some of ions electrons at the end of the acceleration process. Stripping extraction system is commonly designed and optimized using computer simulations of beam dynamics at a later stage of a cyclotron project. However, minor changes in the distance between the magnet poles are proven to cause large displacements of the optimal position of high-energy transport line. It is shown that simple analytical formulas give good prediction of the position and direction of beam exit after stripping extraction and are useful tool for preliminary facility layout planning.
T2  - IEEE Transactions on Nuclear Science
T1  - Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons
VL  - 59
IS  - 2
SP  - 268
EP  - 271
DO  - 10.1109/TNS.2011.2180539
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Nešković, Nebojša B.",
year = "2012",
abstract = "Accelerated ion beams are often extracted from a cyclotron by stripping some of ions electrons at the end of the acceleration process. Stripping extraction system is commonly designed and optimized using computer simulations of beam dynamics at a later stage of a cyclotron project. However, minor changes in the distance between the magnet poles are proven to cause large displacements of the optimal position of high-energy transport line. It is shown that simple analytical formulas give good prediction of the position and direction of beam exit after stripping extraction and are useful tool for preliminary facility layout planning.",
journal = "IEEE Transactions on Nuclear Science",
title = "Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons",
volume = "59",
number = "2",
pages = "268-271",
doi = "10.1109/TNS.2011.2180539"
}

Ristić-Đurović, J. L.,& Nešković, N. B.. (2012). Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons. in IEEE Transactions on Nuclear Science, 59(2), 268-271.
https://doi.org/10.1109/TNS.2011.2180539

Ristić-Đurović JL, Nešković NB. Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons. in IEEE Transactions on Nuclear Science. 2012;59(2):268-271.
doi:10.1109/TNS.2011.2180539 .

Ristić-Đurović, Jasna L., Nešković, Nebojša B., "Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons" in IEEE Transactions on Nuclear Science, 59, no. 2 (2012):268-271,
https://doi.org/10.1109/TNS.2011.2180539 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Nešković, Nebojša B.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4385
AB  - The stripping extraction system of a cyclotron is prized by the range and quality of beams it delivers. The gap size of a cyclotron magnet is one of the parameters which significantly influence the design as well as the output characteristics of the stripping extraction system. The vertical dimension of the beam as well as of the extraction system elements placed inside a vacuum chamber is limited by the magnet gap size. Beside this direct influence, the indirect effect of the magnet gap size on stripping extraction occurs through the magnetic field and its impact on the beam dynamics in the extraction region. The performance of the extraction system is optimized by the proper placement of the point of beam exit from the cyclotron. It is shown that the optimal position of the exit point strongly depends on the magnet gap size. The performance of the optimized stripping extraction system for a smaller gap size is found to be somewhat better.
T2  - IEEE Transactions on Nuclear Science
T1  - Influence of Cyclotron Magnet Gap Size on Stripping Extraction
VL  - 58
IS  - 3
SP  - 1188
EP  - 1195
DO  - 10.1109/TNS.2011.2134867
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Nešković, Nebojša B.",
year = "2011",
abstract = "The stripping extraction system of a cyclotron is prized by the range and quality of beams it delivers. The gap size of a cyclotron magnet is one of the parameters which significantly influence the design as well as the output characteristics of the stripping extraction system. The vertical dimension of the beam as well as of the extraction system elements placed inside a vacuum chamber is limited by the magnet gap size. Beside this direct influence, the indirect effect of the magnet gap size on stripping extraction occurs through the magnetic field and its impact on the beam dynamics in the extraction region. The performance of the extraction system is optimized by the proper placement of the point of beam exit from the cyclotron. It is shown that the optimal position of the exit point strongly depends on the magnet gap size. The performance of the optimized stripping extraction system for a smaller gap size is found to be somewhat better.",
journal = "IEEE Transactions on Nuclear Science",
title = "Influence of Cyclotron Magnet Gap Size on Stripping Extraction",
volume = "58",
number = "3",
pages = "1188-1195",
doi = "10.1109/TNS.2011.2134867"
}

Ristić-Đurović, J. L.,& Nešković, N. B.. (2011). Influence of Cyclotron Magnet Gap Size on Stripping Extraction. in IEEE Transactions on Nuclear Science, 58(3), 1188-1195.
https://doi.org/10.1109/TNS.2011.2134867

Ristić-Đurović JL, Nešković NB. Influence of Cyclotron Magnet Gap Size on Stripping Extraction. in IEEE Transactions on Nuclear Science. 2011;58(3):1188-1195.
doi:10.1109/TNS.2011.2134867 .

Ristić-Đurović, Jasna L., Nešković, Nebojša B., "Influence of Cyclotron Magnet Gap Size on Stripping Extraction" in IEEE Transactions on Nuclear Science, 58, no. 3 (2011):1188-1195,
https://doi.org/10.1109/TNS.2011.2134867 . .

TY  - JOUR
AU  - Ilić, Anđelija Z.
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, Sasa
AU  - Dobrosavljević, Aleksandar S.
AU  - Nešković, Nebojša B.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3729
AB  - During the design of a cyclotron the time and attention dedicated to the injection and extraction of a beam usually overcome those devoted to the acceleration. However, the efficiency of the accelerating process largely contributes to the overall efficiency of the machine because the beam spends the most time in the accelerating region. A thorough and systematic study of the influence of beam parameters on the overall quality of acceleration is performed. The conditions for the optimal acceleration are determined and the method for defining the complete continuous sets of input parameters providing such acceleration is proposed.
T2  - IEEE Transactions on Nuclear Science
T1  - Optimal Acceleration in Isochronous Straight Sector Cyclotrons
VL  - 56
IS  - 3
SP  - 1498
EP  - 1506
DO  - 10.1109/TNS.2009.2020899
ER  - 

@article{
author = "Ilić, Anđelija Z. and Ristić-Đurović, Jasna L. and Cirkovic, Sasa and Dobrosavljević, Aleksandar S. and Nešković, Nebojša B.",
year = "2009",
abstract = "During the design of a cyclotron the time and attention dedicated to the injection and extraction of a beam usually overcome those devoted to the acceleration. However, the efficiency of the accelerating process largely contributes to the overall efficiency of the machine because the beam spends the most time in the accelerating region. A thorough and systematic study of the influence of beam parameters on the overall quality of acceleration is performed. The conditions for the optimal acceleration are determined and the method for defining the complete continuous sets of input parameters providing such acceleration is proposed.",
journal = "IEEE Transactions on Nuclear Science",
title = "Optimal Acceleration in Isochronous Straight Sector Cyclotrons",
volume = "56",
number = "3",
pages = "1498-1506",
doi = "10.1109/TNS.2009.2020899"
}

Ilić, A. Z., Ristić-Đurović, J. L., Cirkovic, S., Dobrosavljević, A. S.,& Nešković, N. B.. (2009). Optimal Acceleration in Isochronous Straight Sector Cyclotrons. in IEEE Transactions on Nuclear Science, 56(3), 1498-1506.
https://doi.org/10.1109/TNS.2009.2020899

Ilić AZ, Ristić-Đurović JL, Cirkovic S, Dobrosavljević AS, Nešković NB. Optimal Acceleration in Isochronous Straight Sector Cyclotrons. in IEEE Transactions on Nuclear Science. 2009;56(3):1498-1506.
doi:10.1109/TNS.2009.2020899 .

Ilić, Anđelija Z., Ristić-Đurović, Jasna L., Cirkovic, Sasa, Dobrosavljević, Aleksandar S., Nešković, Nebojša B., "Optimal Acceleration in Isochronous Straight Sector Cyclotrons" in IEEE Transactions on Nuclear Science, 56, no. 3 (2009):1498-1506,
https://doi.org/10.1109/TNS.2009.2020899 . .

TY  - JOUR
AU  - Cirkovic, Sasa
AU  - Ristić-Đurović, Jasna L.
AU  - Vorozhtsov, Alexey S.
AU  - Ilić, Anđelija Z.
AU  - Nešković, Nebojša B.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3808
AB  - The fine shaping of a cyclotron magnet is usually conducted through an iterative procedure by matching the obtained and the required pre-calculated magnetic field. The quality of the obtained magnetic field is then evaluated by the closeness of the resulting ion gyration frequency to its required value. The method we propose is based directly on the gyration frequency adjustment; therefore, the pre-calculated magnetic field criterion and the empirical weight factors often needed for the corresponding shape estimate are avoided. The method is applicable to the angular width as well as the thickness of the magnet elements used in title shaping.
T2  - IEEE Transactions on Nuclear Science
T1  - Method for Fine Magnet Shaping in Cyclotrons
VL  - 56
IS  - 5
SP  - 2821
EP  - 2827
DO  - 10.1109/TNS.2009.2027235
ER  - 

@article{
author = "Cirkovic, Sasa and Ristić-Đurović, Jasna L. and Vorozhtsov, Alexey S. and Ilić, Anđelija Z. and Nešković, Nebojša B.",
year = "2009",
abstract = "The fine shaping of a cyclotron magnet is usually conducted through an iterative procedure by matching the obtained and the required pre-calculated magnetic field. The quality of the obtained magnetic field is then evaluated by the closeness of the resulting ion gyration frequency to its required value. The method we propose is based directly on the gyration frequency adjustment; therefore, the pre-calculated magnetic field criterion and the empirical weight factors often needed for the corresponding shape estimate are avoided. The method is applicable to the angular width as well as the thickness of the magnet elements used in title shaping.",
journal = "IEEE Transactions on Nuclear Science",
title = "Method for Fine Magnet Shaping in Cyclotrons",
volume = "56",
number = "5",
pages = "2821-2827",
doi = "10.1109/TNS.2009.2027235"
}

Cirkovic, S., Ristić-Đurović, J. L., Vorozhtsov, A. S., Ilić, A. Z.,& Nešković, N. B.. (2009). Method for Fine Magnet Shaping in Cyclotrons. in IEEE Transactions on Nuclear Science, 56(5), 2821-2827.
https://doi.org/10.1109/TNS.2009.2027235

Cirkovic S, Ristić-Đurović JL, Vorozhtsov AS, Ilić AZ, Nešković NB. Method for Fine Magnet Shaping in Cyclotrons. in IEEE Transactions on Nuclear Science. 2009;56(5):2821-2827.
doi:10.1109/TNS.2009.2027235 .

Cirkovic, Sasa, Ristić-Đurović, Jasna L., Vorozhtsov, Alexey S., Ilić, Anđelija Z., Nešković, Nebojša B., "Method for Fine Magnet Shaping in Cyclotrons" in IEEE Transactions on Nuclear Science, 56, no. 5 (2009):2821-2827,
https://doi.org/10.1109/TNS.2009.2027235 . .

TY  - JOUR
AU  - Dobrosavljević, Aleksandar S.
AU  - Nešković, Nebojša B.
AU  - Beličev, Petar
AU  - Čomor, Jožef J.
AU  - Vujović, Velibor V.
AU  - Balvanović, Roman V.
AU  - Ristić-Đurović, Jasna L.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3600
AB  - t present, heavy ion beams from the electron cyclotron resonance (ECR) ion source in the Laboratory of Physics of the Vinca Institute of Nuclear Sciences, Belgrade, Serbia, are employed in a channel for surface modification of materials. The source and channel were commissioned in 1998, and have been used since that time by a number of user groups from the Vinca Institute and other scientific and educational institutions in Serbia. However, since the maximum extraction voltage of the source is +25 kV, sometimes the extracted beams do not have sufficiently high energies for such applications. Therefore, in order to solve this problem, we have decided to construct a new channel, to be used for deeper modification of materials. The beams obtained from the source will be post-accelerated by biasing the target to be irradiated to the negative potentials of down to - 100 W For example, we shall be able to bombard the target with the (132)Xe(24+) beam of the energy of up to 3 MeV, instead of up to 600 keV, in the case without the biasing system. An additional possibility will be to bias the target to the positive potentials of up to +25 kV and thus decelerate the beams extracted from the source down to the energies of about 1 keV. Consequently, one will be able to modify materials with the beams in a wide energy range, from similar to 1 to similar to 3 MeV, which is rarely met at similar experimental set-ups. It must be noted that changing the post-accelerated or decelerated beam energy in the new channel will be performed simply by adjusting the power supply of the biasing system, without any adjustments of the source and of the transport elements between the source and the interaction chamber. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - A channel for modification of materials with post-accelerated or decelerated multiply charged ion beams
VL  - 597
IS  - 2-3
SP  - 136
EP  - 141
DO  - 10.1016/j.nima.2008.08.148
ER  - 

@article{
author = "Dobrosavljević, Aleksandar S. and Nešković, Nebojša B. and Beličev, Petar and Čomor, Jožef J. and Vujović, Velibor V. and Balvanović, Roman V. and Ristić-Đurović, Jasna L.",
year = "2008",
abstract = "t present, heavy ion beams from the electron cyclotron resonance (ECR) ion source in the Laboratory of Physics of the Vinca Institute of Nuclear Sciences, Belgrade, Serbia, are employed in a channel for surface modification of materials. The source and channel were commissioned in 1998, and have been used since that time by a number of user groups from the Vinca Institute and other scientific and educational institutions in Serbia. However, since the maximum extraction voltage of the source is +25 kV, sometimes the extracted beams do not have sufficiently high energies for such applications. Therefore, in order to solve this problem, we have decided to construct a new channel, to be used for deeper modification of materials. The beams obtained from the source will be post-accelerated by biasing the target to be irradiated to the negative potentials of down to - 100 W For example, we shall be able to bombard the target with the (132)Xe(24+) beam of the energy of up to 3 MeV, instead of up to 600 keV, in the case without the biasing system. An additional possibility will be to bias the target to the positive potentials of up to +25 kV and thus decelerate the beams extracted from the source down to the energies of about 1 keV. Consequently, one will be able to modify materials with the beams in a wide energy range, from similar to 1 to similar to 3 MeV, which is rarely met at similar experimental set-ups. It must be noted that changing the post-accelerated or decelerated beam energy in the new channel will be performed simply by adjusting the power supply of the biasing system, without any adjustments of the source and of the transport elements between the source and the interaction chamber. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "A channel for modification of materials with post-accelerated or decelerated multiply charged ion beams",
volume = "597",
number = "2-3",
pages = "136-141",
doi = "10.1016/j.nima.2008.08.148"
}

Dobrosavljević, A. S., Nešković, N. B., Beličev, P., Čomor, J. J., Vujović, V. V., Balvanović, R. V.,& Ristić-Đurović, J. L.. (2008). A channel for modification of materials with post-accelerated or decelerated multiply charged ion beams. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 597(2-3), 136-141.
https://doi.org/10.1016/j.nima.2008.08.148

Dobrosavljević AS, Nešković NB, Beličev P, Čomor JJ, Vujović VV, Balvanović RV, Ristić-Đurović JL. A channel for modification of materials with post-accelerated or decelerated multiply charged ion beams. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2008;597(2-3):136-141.
doi:10.1016/j.nima.2008.08.148 .

Dobrosavljević, Aleksandar S., Nešković, Nebojša B., Beličev, Petar, Čomor, Jožef J., Vujović, Velibor V., Balvanović, Roman V., Ristić-Đurović, Jasna L., "A channel for modification of materials with post-accelerated or decelerated multiply charged ion beams" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 597, no. 2-3 (2008):136-141,
https://doi.org/10.1016/j.nima.2008.08.148 . .

TY  - JOUR
AU  - Cirkovic, Sasa
AU  - Ristić-Đurović, Jasna L.
AU  - Ihic, Andjelija Z.
AU  - Vujović, Velibor V.
AU  - Negkovic, Nebojsa A.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3622
AB  - Accurate magnetic fields are needed for defining the operation of a multipurpose cyclotron as well as for designing other parts of the machine, as an input parameter. The quality of an isochronous magnetic field is evaluated by the closeness of the obtained ion gyration frequency to its required value. The commonly used method of isochronous field calculation for sector focused cyclotrons was Gordons procedure. The incorporation of the gyration frequency criterion in isochronous field calculation has grown with the increase of the computer speed. We suggest a highly accurate method for the isochronous magnetic field calculation based on the gyration frequency adjustment.
T2  - IEEE Transactions on Nuclear Science
T1  - Comparative Analysis of Methods for Isochronous Magnetic-Field Calculation
VL  - 55
IS  - 6
SP  - 3531
EP  - 3538
DO  - 10.1109/TNS.2008.2005498
ER  - 

@article{
author = "Cirkovic, Sasa and Ristić-Đurović, Jasna L. and Ihic, Andjelija Z. and Vujović, Velibor V. and Negkovic, Nebojsa A.",
year = "2008",
abstract = "Accurate magnetic fields are needed for defining the operation of a multipurpose cyclotron as well as for designing other parts of the machine, as an input parameter. The quality of an isochronous magnetic field is evaluated by the closeness of the obtained ion gyration frequency to its required value. The commonly used method of isochronous field calculation for sector focused cyclotrons was Gordons procedure. The incorporation of the gyration frequency criterion in isochronous field calculation has grown with the increase of the computer speed. We suggest a highly accurate method for the isochronous magnetic field calculation based on the gyration frequency adjustment.",
journal = "IEEE Transactions on Nuclear Science",
title = "Comparative Analysis of Methods for Isochronous Magnetic-Field Calculation",
volume = "55",
number = "6",
pages = "3531-3538",
doi = "10.1109/TNS.2008.2005498"
}

Cirkovic, S., Ristić-Đurović, J. L., Ihic, A. Z., Vujović, V. V.,& Negkovic, N. A.. (2008). Comparative Analysis of Methods for Isochronous Magnetic-Field Calculation. in IEEE Transactions on Nuclear Science, 55(6), 3531-3538.
https://doi.org/10.1109/TNS.2008.2005498

Cirkovic S, Ristić-Đurović JL, Ihic AZ, Vujović VV, Negkovic NA. Comparative Analysis of Methods for Isochronous Magnetic-Field Calculation. in IEEE Transactions on Nuclear Science. 2008;55(6):3531-3538.
doi:10.1109/TNS.2008.2005498 .

Cirkovic, Sasa, Ristić-Đurović, Jasna L., Ihic, Andjelija Z., Vujović, Velibor V., Negkovic, Nebojsa A., "Comparative Analysis of Methods for Isochronous Magnetic-Field Calculation" in IEEE Transactions on Nuclear Science, 55, no. 6 (2008):3531-3538,
https://doi.org/10.1109/TNS.2008.2005498 . .

TY  - JOUR
AU  - Nešković, Nebojša B.
AU  - Ristić-Đurović, Jasna L.
AU  - Vorojtsov, SB
AU  - Beličev, Petar
AU  - Ivanenko, IA
AU  - Cirkovic, S
AU  - Vorozhtsov, AS
AU  - Bojović, Boško
AU  - Dobrosavljević, Aleksandar S.
AU  - Vujović, Velibor V.
AU  - Čomor, Jožef J.
AU  - Pajović, Snežana B.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6381
AB  - The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two lambda/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H-2(+) beam extracted from the light ion source. This beam will be used first for production of radioisotope F-18 and radiopharmaceutical (18)FDG, to be employed for positron emission tomography.
T2  - Nukleonika
T1  - Status report of the VINCY cyclotron
VL  - 48
SP  - S135
EP  - S139
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6381
ER  - 

@article{
author = "Nešković, Nebojša B. and Ristić-Đurović, Jasna L. and Vorojtsov, SB and Beličev, Petar and Ivanenko, IA and Cirkovic, S and Vorozhtsov, AS and Bojović, Boško and Dobrosavljević, Aleksandar S. and Vujović, Velibor V. and Čomor, Jožef J. and Pajović, Snežana B.",
year = "2003",
abstract = "The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two lambda/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H-2(+) beam extracted from the light ion source. This beam will be used first for production of radioisotope F-18 and radiopharmaceutical (18)FDG, to be employed for positron emission tomography.",
journal = "Nukleonika",
title = "Status report of the VINCY cyclotron",
volume = "48",
pages = "S135-S139",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6381"
}

Nešković, N. B., Ristić-Đurović, J. L., Vorojtsov, S., Beličev, P., Ivanenko, I., Cirkovic, S., Vorozhtsov, A., Bojović, B., Dobrosavljević, A. S., Vujović, V. V., Čomor, J. J.,& Pajović, S. B.. (2003). Status report of the VINCY cyclotron. in Nukleonika, 48, S135-S139.
https://hdl.handle.net/21.15107/rcub_vinar_6381

Nešković NB, Ristić-Đurović JL, Vorojtsov S, Beličev P, Ivanenko I, Cirkovic S, Vorozhtsov A, Bojović B, Dobrosavljević AS, Vujović VV, Čomor JJ, Pajović SB. Status report of the VINCY cyclotron. in Nukleonika. 2003;48:S135-S139.
https://hdl.handle.net/21.15107/rcub_vinar_6381 .

Nešković, Nebojša B., Ristić-Đurović, Jasna L., Vorojtsov, SB, Beličev, Petar, Ivanenko, IA, Cirkovic, S, Vorozhtsov, AS, Bojović, Boško, Dobrosavljević, Aleksandar S., Vujović, Velibor V., Čomor, Jožef J., Pajović, Snežana B., "Status report of the VINCY cyclotron" in Nukleonika, 48 (2003):S135-S139,
https://hdl.handle.net/21.15107/rcub_vinar_6381 .

TY  - JOUR
AU  - Vorojtsov, SB
AU  - Vorozhtsov, AS
AU  - Nešković, Nebojša B.
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, S
AU  - Vujović, Velibor V.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6380
AB  - The VINCY Cyclotron is under construction at the Vinca Institute of Nuclear Sciences, Laboratory of Physics, Belgrade, Serbia and Montenegro. One of the most difficult problems to solve is the magnetic field shaping in the central region of the machine in a wide range of field levels. The latest measurements showed a very large magnetic field depression in the central region. The following shimming elements are used for the field shaping in the central region: a central plug and a spacer ring between the sectors and the median pole plate. These elements should both release enough vertical space for the inflector and the RF electrodes and produce a field bump in the very center of the machine. Concerning this region, one has to mention the following facts: sectors are absent or very reduced, and the small gap between the sectors restricts remarkably the possibilities of producing a field bump. Therefore, the design of these elements is the most critical one. Optimization of the central plug gap affects both the vertical sparking probability and the beam dynamics at higher harmonic modes. The redesign of the magnetic structure of the central region relied solely on the detailed 3-dimensional calculations to speed up the experimental shimming procedure. The desired calculated magnetic field shapes, which include the influence of the plug, have been produced and confirmed by the particle tracing for the 3-field levels. The final tailoring of the field map will be performed by the measurements at the full-size magnet.
T2  - Nukleonika
T1  - Magnetic field simulation in the central region of the VINCY Cyclotron
VL  - 48
SP  - S39
EP  - S44
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6380
ER  - 

@article{
author = "Vorojtsov, SB and Vorozhtsov, AS and Nešković, Nebojša B. and Ristić-Đurović, Jasna L. and Cirkovic, S and Vujović, Velibor V.",
year = "2003",
abstract = "The VINCY Cyclotron is under construction at the Vinca Institute of Nuclear Sciences, Laboratory of Physics, Belgrade, Serbia and Montenegro. One of the most difficult problems to solve is the magnetic field shaping in the central region of the machine in a wide range of field levels. The latest measurements showed a very large magnetic field depression in the central region. The following shimming elements are used for the field shaping in the central region: a central plug and a spacer ring between the sectors and the median pole plate. These elements should both release enough vertical space for the inflector and the RF electrodes and produce a field bump in the very center of the machine. Concerning this region, one has to mention the following facts: sectors are absent or very reduced, and the small gap between the sectors restricts remarkably the possibilities of producing a field bump. Therefore, the design of these elements is the most critical one. Optimization of the central plug gap affects both the vertical sparking probability and the beam dynamics at higher harmonic modes. The redesign of the magnetic structure of the central region relied solely on the detailed 3-dimensional calculations to speed up the experimental shimming procedure. The desired calculated magnetic field shapes, which include the influence of the plug, have been produced and confirmed by the particle tracing for the 3-field levels. The final tailoring of the field map will be performed by the measurements at the full-size magnet.",
journal = "Nukleonika",
title = "Magnetic field simulation in the central region of the VINCY Cyclotron",
volume = "48",
pages = "S39-S44",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6380"
}

Vorojtsov, S., Vorozhtsov, A., Nešković, N. B., Ristić-Đurović, J. L., Cirkovic, S.,& Vujović, V. V.. (2003). Magnetic field simulation in the central region of the VINCY Cyclotron. in Nukleonika, 48, S39-S44.
https://hdl.handle.net/21.15107/rcub_vinar_6380

Vorojtsov S, Vorozhtsov A, Nešković NB, Ristić-Đurović JL, Cirkovic S, Vujović VV. Magnetic field simulation in the central region of the VINCY Cyclotron. in Nukleonika. 2003;48:S39-S44.
https://hdl.handle.net/21.15107/rcub_vinar_6380 .

Vorojtsov, SB, Vorozhtsov, AS, Nešković, Nebojša B., Ristić-Đurović, Jasna L., Cirkovic, S, Vujović, Velibor V., "Magnetic field simulation in the central region of the VINCY Cyclotron" in Nukleonika, 48 (2003):S39-S44,
https://hdl.handle.net/21.15107/rcub_vinar_6380 .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Cirkovic, S
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2625
AB  - The VINCY Cyclotron (VINca CYclotron) is a multipurpose machine intended to accelerate light as well as heavy ions. To extract heavy ions with low energy and light ions an extraction system with stripping foil is used. Heavy ions with high energy will be extracted by means of an electrostatic deflector. The former extraction system will be manufactured and used first. The proposed unidirectional stripping extraction system is the optimal balance between the placement of the extraction line and the required diversity and quality of the extracted beam. The available range of extraction directions is set by geometry limitations.
T2  - Physical Review Special Topics - Accelerators and Beams
T1  - Unidirectional stripping extraction from a cyclotron which accelerates light as well as heavy ions
VL  - 6
IS  - 3
DO  - 10.1103/PhysRevSTAB.6.033501
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Cirkovic, S",
year = "2003",
abstract = "The VINCY Cyclotron (VINca CYclotron) is a multipurpose machine intended to accelerate light as well as heavy ions. To extract heavy ions with low energy and light ions an extraction system with stripping foil is used. Heavy ions with high energy will be extracted by means of an electrostatic deflector. The former extraction system will be manufactured and used first. The proposed unidirectional stripping extraction system is the optimal balance between the placement of the extraction line and the required diversity and quality of the extracted beam. The available range of extraction directions is set by geometry limitations.",
journal = "Physical Review Special Topics - Accelerators and Beams",
title = "Unidirectional stripping extraction from a cyclotron which accelerates light as well as heavy ions",
volume = "6",
number = "3",
doi = "10.1103/PhysRevSTAB.6.033501"
}

Ristić-Đurović, J. L.,& Cirkovic, S.. (2003). Unidirectional stripping extraction from a cyclotron which accelerates light as well as heavy ions. in Physical Review Special Topics - Accelerators and Beams, 6(3).
https://doi.org/10.1103/PhysRevSTAB.6.033501

Ristić-Đurović JL, Cirkovic S. Unidirectional stripping extraction from a cyclotron which accelerates light as well as heavy ions. in Physical Review Special Topics - Accelerators and Beams. 2003;6(3).
doi:10.1103/PhysRevSTAB.6.033501 .

Ristić-Đurović, Jasna L., Cirkovic, S, "Unidirectional stripping extraction from a cyclotron which accelerates light as well as heavy ions" in Physical Review Special Topics - Accelerators and Beams, 6, no. 3 (2003),
https://doi.org/10.1103/PhysRevSTAB.6.033501 . .

TY  - CONF
AU  - Ristić-Đurović, Jasna L.
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6390
AB  - Stripping extraction is broadly used for negative ion beam extraction from a cyclotron. During extraction, negative ions travel only through the pole edge magnetic field gradient. In addition to the pole edge region, positive ions, after stripping, can also pass more than once through regions of large sector edge magnetic field gradients. The ions are specified as positive or negative according to their sign during acceleration. Influence of the magnetic field gradients on the trajectory and envelopes of a stripped positive ion beam is shown. The consequences on the design of the stripping extraction system of a cyclotron are discussed.
T1  - The role of magnetic field gradients in stripping extraction from a cyclotron
SP  - 67
EP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6390
ER  - 

@conference{
author = "Ristić-Đurović, Jasna L.",
year = "2002",
abstract = "Stripping extraction is broadly used for negative ion beam extraction from a cyclotron. During extraction, negative ions travel only through the pole edge magnetic field gradient. In addition to the pole edge region, positive ions, after stripping, can also pass more than once through regions of large sector edge magnetic field gradients. The ions are specified as positive or negative according to their sign during acceleration. Influence of the magnetic field gradients on the trajectory and envelopes of a stripped positive ion beam is shown. The consequences on the design of the stripping extraction system of a cyclotron are discussed.",
title = "The role of magnetic field gradients in stripping extraction from a cyclotron",
pages = "67-70",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6390"
}

Ristić-Đurović, J. L.. (2002). The role of magnetic field gradients in stripping extraction from a cyclotron. , 67-70.
https://hdl.handle.net/21.15107/rcub_vinar_6390

Ristić-Đurović JL. The role of magnetic field gradients in stripping extraction from a cyclotron. 2002;:67-70.
https://hdl.handle.net/21.15107/rcub_vinar_6390 .

Ristić-Đurović, Jasna L., "The role of magnetic field gradients in stripping extraction from a cyclotron" (2002):67-70,
https://hdl.handle.net/21.15107/rcub_vinar_6390 .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
PY  - 2001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2481
AB  - In a multipurpose cyclotron, it is convenient to use stripping extraction to extract selected positive ions in addition to the usual extraction by stripping of negative ions. The ions are specified as positive or negative according to the sign of their charge during acceleration. After stripping, positive ions travel not only through the pole edge magnetic field gradient, as is the case with negative ions, but can also pass more than once through regions of large sector edge magnetic field gradients. Influence of the magnetic field gradients on the trajectory of a stripped positive ion and on the extracted beam emittance is studied. It is shown that extraction efficiency depends on the position of the point of beam extraction from a cyclotron and on the ratio between ion charge after and before stripping. The position of the point of extraction also strongly affects the design parameters of the stripping extraction system. Extraction quality and design parameters cannot all be simultaneously optimized. The method of extraction system optimization is suggested and applied to the special case of the VINCY cyclotron.
T2  - Physical Review Special Topics - Accelerators and Beams
T1  - Stripping extraction of positive ions from a cyclotron
VL  - 4
IS  - 12
DO  - 10.1103/PhysRevSTAB.4.123501
ER  - 

@article{
author = "Ristić-Đurović, Jasna L.",
year = "2001",
abstract = "In a multipurpose cyclotron, it is convenient to use stripping extraction to extract selected positive ions in addition to the usual extraction by stripping of negative ions. The ions are specified as positive or negative according to the sign of their charge during acceleration. After stripping, positive ions travel not only through the pole edge magnetic field gradient, as is the case with negative ions, but can also pass more than once through regions of large sector edge magnetic field gradients. Influence of the magnetic field gradients on the trajectory of a stripped positive ion and on the extracted beam emittance is studied. It is shown that extraction efficiency depends on the position of the point of beam extraction from a cyclotron and on the ratio between ion charge after and before stripping. The position of the point of extraction also strongly affects the design parameters of the stripping extraction system. Extraction quality and design parameters cannot all be simultaneously optimized. The method of extraction system optimization is suggested and applied to the special case of the VINCY cyclotron.",
journal = "Physical Review Special Topics - Accelerators and Beams",
title = "Stripping extraction of positive ions from a cyclotron",
volume = "4",
number = "12",
doi = "10.1103/PhysRevSTAB.4.123501"
}

Ristić-Đurović, J. L.. (2001). Stripping extraction of positive ions from a cyclotron. in Physical Review Special Topics - Accelerators and Beams, 4(12).
https://doi.org/10.1103/PhysRevSTAB.4.123501

Ristić-Đurović JL. Stripping extraction of positive ions from a cyclotron. in Physical Review Special Topics - Accelerators and Beams. 2001;4(12).
doi:10.1103/PhysRevSTAB.4.123501 .

Ristić-Đurović, Jasna L., "Stripping extraction of positive ions from a cyclotron" in Physical Review Special Topics - Accelerators and Beams, 4, no. 12 (2001),
https://doi.org/10.1103/PhysRevSTAB.4.123501 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Nešković, Nebojša B.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2123
AB  - The spiral inflector (Root, M.S. Thesis, Ph.D. Thesis, University of British Columbia), as a part of the axial injection system of a cyclotron, is designed to inflect the ion beam with the introduction of a negligible energy spread. However, how close its real performance is to the analytical prediction depends on how close the operating conditions are to the assumed analytical stand-alone configuration. If the space in the central region of the cyclotron is limited, the electric field of the inflector and that of the electrodes of the radiofrequency (RF) system overlap, and the relevant zero-potential surface is quite complex. The dependence of the beam energy and time spreads after the inflector exit on the distance from the inflector exit was studied. The beam simulation results show that the beam energy spread decays with the distance from the inflector exit as expected, but that at 8 mm from the inflector exit it can still have the significant value of 0.67 keV (3% of the input energy). The beam time spread is of no interest if a continuous beam is to be produced. However, in the case of a bunched beam, even the smallest obtained value for the output time spread of 3.5 ns (10% of the period of the RF system) may have an important influence on the total efficiency of the machine. Our results demonstrate that both of these spreads need to be taken into account in the further beam simulations between the RF electrodes. (C) 1998 Elsevier Science B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Energy and time spreads of the ion beam caused by the spiral inflector
VL  - 406
IS  - 1
SP  - 172
EP  - 176
DO  - 10.1016/S0168-9002(97)01203-5
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Nešković, Nebojša B.",
year = "1998",
abstract = "The spiral inflector (Root, M.S. Thesis, Ph.D. Thesis, University of British Columbia), as a part of the axial injection system of a cyclotron, is designed to inflect the ion beam with the introduction of a negligible energy spread. However, how close its real performance is to the analytical prediction depends on how close the operating conditions are to the assumed analytical stand-alone configuration. If the space in the central region of the cyclotron is limited, the electric field of the inflector and that of the electrodes of the radiofrequency (RF) system overlap, and the relevant zero-potential surface is quite complex. The dependence of the beam energy and time spreads after the inflector exit on the distance from the inflector exit was studied. The beam simulation results show that the beam energy spread decays with the distance from the inflector exit as expected, but that at 8 mm from the inflector exit it can still have the significant value of 0.67 keV (3% of the input energy). The beam time spread is of no interest if a continuous beam is to be produced. However, in the case of a bunched beam, even the smallest obtained value for the output time spread of 3.5 ns (10% of the period of the RF system) may have an important influence on the total efficiency of the machine. Our results demonstrate that both of these spreads need to be taken into account in the further beam simulations between the RF electrodes. (C) 1998 Elsevier Science B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Energy and time spreads of the ion beam caused by the spiral inflector",
volume = "406",
number = "1",
pages = "172-176",
doi = "10.1016/S0168-9002(97)01203-5"
}

Ristić-Đurović, J. L.,& Nešković, N. B.. (1998). Energy and time spreads of the ion beam caused by the spiral inflector. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 406(1), 172-176.
https://doi.org/10.1016/S0168-9002(97)01203-5

Ristić-Đurović JL, Nešković NB. Energy and time spreads of the ion beam caused by the spiral inflector. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 1998;406(1):172-176.
doi:10.1016/S0168-9002(97)01203-5 .

Ristić-Đurović, Jasna L., Nešković, Nebojša B., "Energy and time spreads of the ion beam caused by the spiral inflector" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 406, no. 1 (1998):172-176,
https://doi.org/10.1016/S0168-9002(97)01203-5 . .

TY  - JOUR
AU  - Ristić-Đurović, Jasna L.
AU  - Bell, TF
AU  - Inan, US
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2140
AB  - We use a test particle simulation model based on gyro-averaged equations of motion to study the influence of oblique magnetospherically reflected (MR) whistlers on the near-loss-cone distribution function of radiation belt electrons. We find that MR whistlers originating in lightning can resonantly interact with radiation belt electrons over a broad range of L shells and precipitate higher energy electrons from lower L Shells. Electrons in the energy-range of 1 to 2.6 MeV are precipitated from L = 2, whereas from L = 4 the precipitated electron energy range is 150-220 keV. The precipitated differential electron flux, due to this interaction, is higher for higher L shells, and the maximum value ranges from Phi E-prec(1.11 MeV) 5.2 x 10(-4) electrons cm(-2) s(-1) keV(-1) at L = 2 to Phi E-prec(173 keV) = 4.6 x 10(-1) electrons cm(-2) s(-1) keV(-1) at L = 4. The lifetimes of radiation belt electrons in a given magnetic flux tube around the L shell on which the interaction takes place are found to be of the order of several days, comparable to lifetimes corresponding to electron loss induced by hiss, which was heretofore assumed to be the dominant loss mechanism [Lyons et al., 1972]. The minimum electron lifetimes vary from 2.4 days for 1.11 MeV electrons at L = 2 to 4.6 days for 173 keV electrons at L = 4.
T2  - Journal of Geophysical Research - Space Physics
T1  - Precipitation of radiation belt electrons by magnetospherically reflected whistlers
VL  - 103
IS  - A5
SP  - 9249
EP  - 9260
DO  - 10.1029/97JA03724
ER  - 

@article{
author = "Ristić-Đurović, Jasna L. and Bell, TF and Inan, US",
year = "1998",
abstract = "We use a test particle simulation model based on gyro-averaged equations of motion to study the influence of oblique magnetospherically reflected (MR) whistlers on the near-loss-cone distribution function of radiation belt electrons. We find that MR whistlers originating in lightning can resonantly interact with radiation belt electrons over a broad range of L shells and precipitate higher energy electrons from lower L Shells. Electrons in the energy-range of 1 to 2.6 MeV are precipitated from L = 2, whereas from L = 4 the precipitated electron energy range is 150-220 keV. The precipitated differential electron flux, due to this interaction, is higher for higher L shells, and the maximum value ranges from Phi E-prec(1.11 MeV) 5.2 x 10(-4) electrons cm(-2) s(-1) keV(-1) at L = 2 to Phi E-prec(173 keV) = 4.6 x 10(-1) electrons cm(-2) s(-1) keV(-1) at L = 4. The lifetimes of radiation belt electrons in a given magnetic flux tube around the L shell on which the interaction takes place are found to be of the order of several days, comparable to lifetimes corresponding to electron loss induced by hiss, which was heretofore assumed to be the dominant loss mechanism [Lyons et al., 1972]. The minimum electron lifetimes vary from 2.4 days for 1.11 MeV electrons at L = 2 to 4.6 days for 173 keV electrons at L = 4.",
journal = "Journal of Geophysical Research - Space Physics",
title = "Precipitation of radiation belt electrons by magnetospherically reflected whistlers",
volume = "103",
number = "A5",
pages = "9249-9260",
doi = "10.1029/97JA03724"
}

Ristić-Đurović, J. L., Bell, T.,& Inan, U.. (1998). Precipitation of radiation belt electrons by magnetospherically reflected whistlers. in Journal of Geophysical Research - Space Physics, 103(A5), 9249-9260.
https://doi.org/10.1029/97JA03724

Ristić-Đurović JL, Bell T, Inan U. Precipitation of radiation belt electrons by magnetospherically reflected whistlers. in Journal of Geophysical Research - Space Physics. 1998;103(A5):9249-9260.
doi:10.1029/97JA03724 .

Ristić-Đurović, Jasna L., Bell, TF, Inan, US, "Precipitation of radiation belt electrons by magnetospherically reflected whistlers" in Journal of Geophysical Research - Space Physics, 103, no. A5 (1998):9249-9260,
https://doi.org/10.1029/97JA03724 . .