TY  - JOUR
AU  - Stanković, K.
AU  - Osmokrović, Predrag V.
AU  - Dolicanin, C.
AU  - Vujisic, M.
AU  - Vasić, Aleksandra
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3682
AB  - This paper investigates the possibility of applying the time enlargement law for predicting how gas-insulated systems would behave when exposed to pulse voltage loads of different shapes. For this purpose, the validity of the time enlargement law in this case has first been tested and the most suitable theoretical distribution function of the breakdown time random variable established. Pulse characteristics of the investigated insulating system have subsequently been determined, by applying the time enlargement law to experimental values of the breakdown time random variable, obtained in measurements with predefined shapes of the voltage load. Pulse characteristics thus obtained were compared with the corresponding pulse characteristics derived from the area law. The results demonstrate the advantages of the time enlargement law method, especially in the case of a non-homogeneous electric field. The experiments were conducted with SF(6) gas, at different values of the pd product (pressure x inter-electrode gap), in a wide frequency range of applied pulse voltages, for a homogeneous, radial and point-plane electrode configuration.
T2  - Plasma Sources Science and Technology
T1  - Time enlargement law for gas pulse breakdown
VL  - 18
IS  - 2
DO  - 10.1088/0963-0252/18/2/025028
ER  - 

@article{
author = "Stanković, K. and Osmokrović, Predrag V. and Dolicanin, C. and Vujisic, M. and Vasić, Aleksandra",
year = "2009",
abstract = "This paper investigates the possibility of applying the time enlargement law for predicting how gas-insulated systems would behave when exposed to pulse voltage loads of different shapes. For this purpose, the validity of the time enlargement law in this case has first been tested and the most suitable theoretical distribution function of the breakdown time random variable established. Pulse characteristics of the investigated insulating system have subsequently been determined, by applying the time enlargement law to experimental values of the breakdown time random variable, obtained in measurements with predefined shapes of the voltage load. Pulse characteristics thus obtained were compared with the corresponding pulse characteristics derived from the area law. The results demonstrate the advantages of the time enlargement law method, especially in the case of a non-homogeneous electric field. The experiments were conducted with SF(6) gas, at different values of the pd product (pressure x inter-electrode gap), in a wide frequency range of applied pulse voltages, for a homogeneous, radial and point-plane electrode configuration.",
journal = "Plasma Sources Science and Technology",
title = "Time enlargement law for gas pulse breakdown",
volume = "18",
number = "2",
doi = "10.1088/0963-0252/18/2/025028"
}

Stanković, K., Osmokrović, P. V., Dolicanin, C., Vujisic, M.,& Vasić, A.. (2009). Time enlargement law for gas pulse breakdown. in Plasma Sources Science and Technology, 18(2).
https://doi.org/10.1088/0963-0252/18/2/025028

Stanković K, Osmokrović PV, Dolicanin C, Vujisic M, Vasić A. Time enlargement law for gas pulse breakdown. in Plasma Sources Science and Technology. 2009;18(2).
doi:10.1088/0963-0252/18/2/025028 .

Stanković, K., Osmokrović, Predrag V., Dolicanin, C., Vujisic, M., Vasić, Aleksandra, "Time enlargement law for gas pulse breakdown" in Plasma Sources Science and Technology, 18, no. 2 (2009),
https://doi.org/10.1088/0963-0252/18/2/025028 . .

TY  - JOUR
AU  - Lončar, Boris B.
AU  - Vujisic, M.
AU  - Stanković, K.
AU  - Osmokrović, Predrag V.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3884
AB  - Wide-spread use of metal-oxide varistors for non-linearity over-voltage protection results in a variety of possible working conditions. It is therefore essential to have a thorough insight into their reliability in various exploitation environments. The influences of temperature variation, aging and radiation exposure on metal-oxide varistors characteristics were investigated in this paper. Stable and effective over-voltage protection over a wide temperature range is always a desirable property, one which significantly contributes to overall system reliability. Behaviour of metal-oxide varistors in the temperature range from -50 degrees C to 150 degrees C was investigated. Aging caused by exploitation was investigated by applying 1000 consecutive double exponential over-voltage pulses to the varistors. Resistance of metal-oxide varistors to the radiation is of special interest in nuclear, military, and space technology. Radiation effects of californium-252 combined neutron/gamma radiation were examined. Voltage-current characteristics, voltage-resistance characteristics and the value of breakdown voltage were used to characterize metal-oxide varistors operation. Non-linearity coefficient, defined from the voltage-current curve, was also used as a parameter. Results are presented with the accompanying theoretical interpretations of the observed changes in metal-oxide varistors behaviour.
T2  - Acta Physica Polonica A
T1  - Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions
VL  - 116
IS  - 6
SP  - 1081
EP  - 1084
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3884
ER  - 

@article{
author = "Lončar, Boris B. and Vujisic, M. and Stanković, K. and Osmokrović, Predrag V.",
year = "2009",
abstract = "Wide-spread use of metal-oxide varistors for non-linearity over-voltage protection results in a variety of possible working conditions. It is therefore essential to have a thorough insight into their reliability in various exploitation environments. The influences of temperature variation, aging and radiation exposure on metal-oxide varistors characteristics were investigated in this paper. Stable and effective over-voltage protection over a wide temperature range is always a desirable property, one which significantly contributes to overall system reliability. Behaviour of metal-oxide varistors in the temperature range from -50 degrees C to 150 degrees C was investigated. Aging caused by exploitation was investigated by applying 1000 consecutive double exponential over-voltage pulses to the varistors. Resistance of metal-oxide varistors to the radiation is of special interest in nuclear, military, and space technology. Radiation effects of californium-252 combined neutron/gamma radiation were examined. Voltage-current characteristics, voltage-resistance characteristics and the value of breakdown voltage were used to characterize metal-oxide varistors operation. Non-linearity coefficient, defined from the voltage-current curve, was also used as a parameter. Results are presented with the accompanying theoretical interpretations of the observed changes in metal-oxide varistors behaviour.",
journal = "Acta Physica Polonica A",
title = "Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions",
volume = "116",
number = "6",
pages = "1081-1084",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3884"
}

Lončar, B. B., Vujisic, M., Stanković, K.,& Osmokrović, P. V.. (2009). Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions. in Acta Physica Polonica A, 116(6), 1081-1084.
https://hdl.handle.net/21.15107/rcub_vinar_3884

Lončar BB, Vujisic M, Stanković K, Osmokrović PV. Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions. in Acta Physica Polonica A. 2009;116(6):1081-1084.
https://hdl.handle.net/21.15107/rcub_vinar_3884 .

Lončar, Boris B., Vujisic, M., Stanković, K., Osmokrović, Predrag V., "Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions" in Acta Physica Polonica A, 116, no. 6 (2009):1081-1084,
https://hdl.handle.net/21.15107/rcub_vinar_3884 .

TY  - JOUR
AU  - Vasić, Aleksandra
AU  - Osmokrović, Predrag V.
AU  - Vujisic, M.
AU  - Dolicanin, C.
AU  - Stanković, K.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3557
AB  - Possibilities for the application of solar systems based on photovoltaic conversion of solar energy are very wide, primarily because of their relatively low cost and very important fact that solar energy is most acceptable source of electrical energy from the environmental point of view. However, as every other energy source, PV technology also has some limitations and disadvantages. In the first place, compared to some other sources, the efficiency of PV modules (i.e. solar cells) is relatively small. One of the most limiting factors for all kinds of detectors is their noise, especially frequency dependent generation-recombination noise, burst noise and 1/f noise. It has been suggested that the cause of the 1/f noise is the trapping of electrons at the surface states as well as in the bulk. That is why the improvement of electrical characteristics of contact layers is very important. Silicides are widely investigated as promising reliable and reproducible contacts. The aim of this paper is to present the possibilities of lowering noise in silicides (that could be used as contacts) and in solar cells as a whole.
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Possibilities of improvement of silicon solar cell characteristics by lowering noise
VL  - 10
IS  - 10
SP  - 2800
EP  - 2804
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3557
ER  - 

@article{
author = "Vasić, Aleksandra and Osmokrović, Predrag V. and Vujisic, M. and Dolicanin, C. and Stanković, K.",
year = "2008",
abstract = "Possibilities for the application of solar systems based on photovoltaic conversion of solar energy are very wide, primarily because of their relatively low cost and very important fact that solar energy is most acceptable source of electrical energy from the environmental point of view. However, as every other energy source, PV technology also has some limitations and disadvantages. In the first place, compared to some other sources, the efficiency of PV modules (i.e. solar cells) is relatively small. One of the most limiting factors for all kinds of detectors is their noise, especially frequency dependent generation-recombination noise, burst noise and 1/f noise. It has been suggested that the cause of the 1/f noise is the trapping of electrons at the surface states as well as in the bulk. That is why the improvement of electrical characteristics of contact layers is very important. Silicides are widely investigated as promising reliable and reproducible contacts. The aim of this paper is to present the possibilities of lowering noise in silicides (that could be used as contacts) and in solar cells as a whole.",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Possibilities of improvement of silicon solar cell characteristics by lowering noise",
volume = "10",
number = "10",
pages = "2800-2804",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3557"
}

Vasić, A., Osmokrović, P. V., Vujisic, M., Dolicanin, C.,& Stanković, K.. (2008). Possibilities of improvement of silicon solar cell characteristics by lowering noise. in Journal of Optoelectronics and Advanced Materials, 10(10), 2800-2804.
https://hdl.handle.net/21.15107/rcub_vinar_3557

Vasić A, Osmokrović PV, Vujisic M, Dolicanin C, Stanković K. Possibilities of improvement of silicon solar cell characteristics by lowering noise. in Journal of Optoelectronics and Advanced Materials. 2008;10(10):2800-2804.
https://hdl.handle.net/21.15107/rcub_vinar_3557 .

Vasić, Aleksandra, Osmokrović, Predrag V., Vujisic, M., Dolicanin, C., Stanković, K., "Possibilities of improvement of silicon solar cell characteristics by lowering noise" in Journal of Optoelectronics and Advanced Materials, 10, no. 10 (2008):2800-2804,
https://hdl.handle.net/21.15107/rcub_vinar_3557 .

TY  - JOUR
AU  - Osmokrović, Predrag V.
AU  - Arsic, N.
AU  - Vujisic, M.
AU  - Stanković, K.
AU  - Dolicanin, C.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3570
AB  - Two types of three-electrode gas-insulated spark gaps have been investigated in this paper: one with the third electrode located inside the main electrode, and the other with a separate third electrode. Three types of insulating media have been used: vacuum, SF6 and N2. Additionally, three different electrode materials have been implemented: copper, steel and tungsten. The following characteristics have been tested experimentally: the influence of insulating gas parameters on spark gap operation, the influence of the polarity of working and trigger voltages on spark gap operation, and the influence of the rate of rise of the trigger voltage on spark gap operation and the degree of spark gap irreversibility. A theoretical model of the spark gap is presented in the paper, which provides a basis for explaining experimental results depending on specific characteristics of the spark gap.
T2  - Plasma Devices and Operations
T1  - Reliability of three-electrode spark gaps
VL  - 16
IS  - 4
SP  - 235
EP  - 245
DO  - 10.1080/10519990802433891
ER  - 

@article{
author = "Osmokrović, Predrag V. and Arsic, N. and Vujisic, M. and Stanković, K. and Dolicanin, C.",
year = "2008",
abstract = "Two types of three-electrode gas-insulated spark gaps have been investigated in this paper: one with the third electrode located inside the main electrode, and the other with a separate third electrode. Three types of insulating media have been used: vacuum, SF6 and N2. Additionally, three different electrode materials have been implemented: copper, steel and tungsten. The following characteristics have been tested experimentally: the influence of insulating gas parameters on spark gap operation, the influence of the polarity of working and trigger voltages on spark gap operation, and the influence of the rate of rise of the trigger voltage on spark gap operation and the degree of spark gap irreversibility. A theoretical model of the spark gap is presented in the paper, which provides a basis for explaining experimental results depending on specific characteristics of the spark gap.",
journal = "Plasma Devices and Operations",
title = "Reliability of three-electrode spark gaps",
volume = "16",
number = "4",
pages = "235-245",
doi = "10.1080/10519990802433891"
}

Osmokrović, P. V., Arsic, N., Vujisic, M., Stanković, K.,& Dolicanin, C.. (2008). Reliability of three-electrode spark gaps. in Plasma Devices and Operations, 16(4), 235-245.
https://doi.org/10.1080/10519990802433891

Osmokrović PV, Arsic N, Vujisic M, Stanković K, Dolicanin C. Reliability of three-electrode spark gaps. in Plasma Devices and Operations. 2008;16(4):235-245.
doi:10.1080/10519990802433891 .

Osmokrović, Predrag V., Arsic, N., Vujisic, M., Stanković, K., Dolicanin, C., "Reliability of three-electrode spark gaps" in Plasma Devices and Operations, 16, no. 4 (2008):235-245,
https://doi.org/10.1080/10519990802433891 . .