TY  - JOUR
AU  - Aranđelović, Nemanja
AU  - Nikezić, Dušan P.
AU  - Ramadani, Uzahir
AU  - Lazović, Ivan
AU  - Mirkov, Nikola S.
AU  - Osmokrović, Predrag V.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10435
AB  - The research presents an experiment with a model of an electronic generator for energy injection into the plasma of a fusion reactor. By recording a non-ionizing field in the vicinity of a fusion reactor, it was determined that this field has an extremely high growth rate. At the site of the maximum intensity of the field of non-ionizing radiation, commercial surge arresters with a flexible model of surge arresters were used for experimentation. It has been found that the commercial surge arresters have an efficiency of about 20%. For the efficiency of the flexible model, it was found to be slightly less than 40% (and to be achieved by the application of alpha particle radiation). Since neither of these efficiencies guarantee reliable operation of the gas-filled surge arrester, it was concluded that essential electronics in the vicinity of the fusion generator must be protected. However, since this protection can only be implemented in a fusion reactor, the fact remains that the environment of such a reactor is extremely contaminated with non-ionizing radiation. Commercial surge voltages are isolated for testing since the protection of electronic circuits from fast overvoltages is a critical point for the functioning of modern electronics.
T2  - Nuclear Technology and Radiation Protection
T1  - The efficiency of gas-filled surge arresters in the environment contaminated by non-ionizing radiation of fusion reactors
VL  - 37
IS  - 1
SP  - 51
EP  - 56
DO  - 10.2298/NTRP2201051A
ER  - 

@article{
author = "Aranđelović, Nemanja and Nikezić, Dušan P. and Ramadani, Uzahir and Lazović, Ivan and Mirkov, Nikola S. and Osmokrović, Predrag V.",
year = "2022",
abstract = "The research presents an experiment with a model of an electronic generator for energy injection into the plasma of a fusion reactor. By recording a non-ionizing field in the vicinity of a fusion reactor, it was determined that this field has an extremely high growth rate. At the site of the maximum intensity of the field of non-ionizing radiation, commercial surge arresters with a flexible model of surge arresters were used for experimentation. It has been found that the commercial surge arresters have an efficiency of about 20%. For the efficiency of the flexible model, it was found to be slightly less than 40% (and to be achieved by the application of alpha particle radiation). Since neither of these efficiencies guarantee reliable operation of the gas-filled surge arrester, it was concluded that essential electronics in the vicinity of the fusion generator must be protected. However, since this protection can only be implemented in a fusion reactor, the fact remains that the environment of such a reactor is extremely contaminated with non-ionizing radiation. Commercial surge voltages are isolated for testing since the protection of electronic circuits from fast overvoltages is a critical point for the functioning of modern electronics.",
journal = "Nuclear Technology and Radiation Protection",
title = "The efficiency of gas-filled surge arresters in the environment contaminated by non-ionizing radiation of fusion reactors",
volume = "37",
number = "1",
pages = "51-56",
doi = "10.2298/NTRP2201051A"
}

Aranđelović, N., Nikezić, D. P., Ramadani, U., Lazović, I., Mirkov, N. S.,& Osmokrović, P. V.. (2022). The efficiency of gas-filled surge arresters in the environment contaminated by non-ionizing radiation of fusion reactors. in Nuclear Technology and Radiation Protection, 37(1), 51-56.
https://doi.org/10.2298/NTRP2201051A

Aranđelović N, Nikezić DP, Ramadani U, Lazović I, Mirkov NS, Osmokrović PV. The efficiency of gas-filled surge arresters in the environment contaminated by non-ionizing radiation of fusion reactors. in Nuclear Technology and Radiation Protection. 2022;37(1):51-56.
doi:10.2298/NTRP2201051A .

Aranđelović, Nemanja, Nikezić, Dušan P., Ramadani, Uzahir, Lazović, Ivan, Mirkov, Nikola S., Osmokrović, Predrag V., "The efficiency of gas-filled surge arresters in the environment contaminated by non-ionizing radiation of fusion reactors" in Nuclear Technology and Radiation Protection, 37, no. 1 (2022):51-56,
https://doi.org/10.2298/NTRP2201051A . .

TY  - JOUR
AU  - Aranđelović, Nemanja
AU  - Nikezić, Dušan P.
AU  - Brajović, Dragan
AU  - Ramadani, Uzahir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10261
AB  - Recently, the idea of injecting energy with electromagnetic radiation in order to heat the plasma to achieve controlled fusion has been abandoned. This initially favored mechanism was rejected because it has been shown that after a certain temperature the plasma glows and acts as a mirror that reflects electromagnetic radiation. For that reason, today the energy is injected into the plasma by electrons. For this purpose, pulses from several electron beam generators, based on a Marx generator, are synchronously fired into the plasma. In addition to economic problems, the biggest problem of this method is the appearance of jitter, i.e., pulses with a width of about 5 ns are not simply added up but propagated in time due to the impossibility of synchronizing simultaneous triggering of the multiple electronic generators. In order to avoid this, the possibility of monitoring the pulses from an individual electron beam generator for the purpose of online synchronization is investigated in this paper. The voltage pulse monitoring of the electron beam generator was measured by instruments with the fastest response—the electro-optical Kerr effect and a fast capacitive probe. The obtained results showed that the electro-optical Kerr response is somewhat faster but much more complicated, so the use of fast capacitive probes is recommended for practice.
T2  - Fusion Science and Technology
T1  - Comparison of Measurement Reliability of Nanosecond Rectangular Voltage Pulses by Kerr Effect and by High-Speed Voltage Probe
SP  - 1
EP  - 10
DO  - 10.1080/15361055.2022.2031690
ER  - 

@article{
author = "Aranđelović, Nemanja and Nikezić, Dušan P. and Brajović, Dragan and Ramadani, Uzahir",
year = "2022",
abstract = "Recently, the idea of injecting energy with electromagnetic radiation in order to heat the plasma to achieve controlled fusion has been abandoned. This initially favored mechanism was rejected because it has been shown that after a certain temperature the plasma glows and acts as a mirror that reflects electromagnetic radiation. For that reason, today the energy is injected into the plasma by electrons. For this purpose, pulses from several electron beam generators, based on a Marx generator, are synchronously fired into the plasma. In addition to economic problems, the biggest problem of this method is the appearance of jitter, i.e., pulses with a width of about 5 ns are not simply added up but propagated in time due to the impossibility of synchronizing simultaneous triggering of the multiple electronic generators. In order to avoid this, the possibility of monitoring the pulses from an individual electron beam generator for the purpose of online synchronization is investigated in this paper. The voltage pulse monitoring of the electron beam generator was measured by instruments with the fastest response—the electro-optical Kerr effect and a fast capacitive probe. The obtained results showed that the electro-optical Kerr response is somewhat faster but much more complicated, so the use of fast capacitive probes is recommended for practice.",
journal = "Fusion Science and Technology",
title = "Comparison of Measurement Reliability of Nanosecond Rectangular Voltage Pulses by Kerr Effect and by High-Speed Voltage Probe",
pages = "1-10",
doi = "10.1080/15361055.2022.2031690"
}

Aranđelović, N., Nikezić, D. P., Brajović, D.,& Ramadani, U.. (2022). Comparison of Measurement Reliability of Nanosecond Rectangular Voltage Pulses by Kerr Effect and by High-Speed Voltage Probe. in Fusion Science and Technology, 1-10.
https://doi.org/10.1080/15361055.2022.2031690

Aranđelović N, Nikezić DP, Brajović D, Ramadani U. Comparison of Measurement Reliability of Nanosecond Rectangular Voltage Pulses by Kerr Effect and by High-Speed Voltage Probe. in Fusion Science and Technology. 2022;:1-10.
doi:10.1080/15361055.2022.2031690 .

Aranđelović, Nemanja, Nikezić, Dušan P., Brajović, Dragan, Ramadani, Uzahir, "Comparison of Measurement Reliability of Nanosecond Rectangular Voltage Pulses by Kerr Effect and by High-Speed Voltage Probe" in Fusion Science and Technology (2022):1-10,
https://doi.org/10.1080/15361055.2022.2031690 . .

TY  - JOUR
AU  - Aranđelović, Nemanja
AU  - Nikezić, Dušan P.
AU  - Brajović, Dragan
AU  - Ramadani, Uzahir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9876
AB  - In this paper, the possibility of measuring the electronic pulse from an electronic generator for plasma heating by electro-optical method is considered. The experiments are performed by applying the Kerr effect on an electronic generator model. Kerr effect shows very good characteristics for measuring nanosecond pulse rate. However, the results obtained show that these characteristics are significantly spoiled by gamma radiation in a dynamic state as well as by the absorbed dose of gamma radiation. When the simplicity of measuring with a capacitive probe is added to that, it can be concluded that the Kerr electro-optical effect is not recommended for measurement in fusion experiments.
T2  - Radiation Effects and Defects in Solids
T1  - Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect
VL  - 176
IS  - 7-8
SP  - 747
EP  - 757
DO  - 10.1080/10420150.2021.1950153
ER  - 

@article{
author = "Aranđelović, Nemanja and Nikezić, Dušan P. and Brajović, Dragan and Ramadani, Uzahir",
year = "2021",
abstract = "In this paper, the possibility of measuring the electronic pulse from an electronic generator for plasma heating by electro-optical method is considered. The experiments are performed by applying the Kerr effect on an electronic generator model. Kerr effect shows very good characteristics for measuring nanosecond pulse rate. However, the results obtained show that these characteristics are significantly spoiled by gamma radiation in a dynamic state as well as by the absorbed dose of gamma radiation. When the simplicity of measuring with a capacitive probe is added to that, it can be concluded that the Kerr electro-optical effect is not recommended for measurement in fusion experiments.",
journal = "Radiation Effects and Defects in Solids",
title = "Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect",
volume = "176",
number = "7-8",
pages = "747-757",
doi = "10.1080/10420150.2021.1950153"
}

Aranđelović, N., Nikezić, D. P., Brajović, D.,& Ramadani, U.. (2021). Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect. in Radiation Effects and Defects in Solids, 176(7-8), 747-757.
https://doi.org/10.1080/10420150.2021.1950153

Aranđelović N, Nikezić DP, Brajović D, Ramadani U. Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect. in Radiation Effects and Defects in Solids. 2021;176(7-8):747-757.
doi:10.1080/10420150.2021.1950153 .

Aranđelović, Nemanja, Nikezić, Dušan P., Brajović, Dragan, Ramadani, Uzahir, "Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect" in Radiation Effects and Defects in Solids, 176, no. 7-8 (2021):747-757,
https://doi.org/10.1080/10420150.2021.1950153 . .