Journal of Radio Electronics. eISSN 1684-1719. 2025. ¹11
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2025.11.23
17th International Conference
Gas Discharge Plasmas and Their Applications
Ekaterinburg, Russia, 8-12 September 2025
OPERATING MODES OF THE FERROMAGNETIC CORE
OF THE LOAD CURRENT TRANSFORMER IN A CASCADE CIRCUIT
ON THE GIT-12 GENERATOR
V.A. Kokshenev, V.A. Sinebrykhov, A.A. Zherlitsyn
Institute of High Current Electronics SB RAS,
634055, Russia, Tomsk, Akademicheskii Ave. 2/3
The paper was received October 2, 2025.
Abstract. The paper presents the results of test experiments and numerical analysis of the cascade circuit operation on the GIT-12 megaampere generator. This is a new technology of powerful pulse equipment, in which a cascade of a plasma îpening switch (POS) and a load current multiplier (LCM) is installed at the output of a microsecond generator. A special feature of the LCM design is the use of a ferromagnetic core with vacuum insulation. This allows implementing a current magnification factor of 2 at a current amplitude in the Z-pinch load of up to 5 MA. The effect of the load on the leakage value in the cavity of the ferromagnetic core with vacuum insulation is studied. The results of test experiments of the cascade circuit operation on a liner load at a peak implosion current of up to 4 MA are presented. The parameters of the POS and Z-pinch loads corresponding to the operation of the cores in the current doubling mode are determined.
Keywords: Marx generator, load current multiplier, ferromagnetic core, plasma îpening switch, Z-pinch.
Financing: The work was performed under State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWRM-2021-0001).
Corresponding author: Kokshenev Vladimtr Alekseevich, vak@oit.hcei.tsc.ru
References
1. Gong Z. et al. Model of a 5-MA Linear-Transformer-Driver Accelerator: Comparison of MITL Performance for Bremsstrahlung Electron Beam Diodes and Z-Pinch Loads // Laser and Particle Beams. – 2023. – Ò. 2023. – Ñ. e13. https://doi.org/10.1155/2023/2021696
2. Spielman R.B. et al. Conceptual design of a 15-TW pulsed-power accelerator for high-energydensity- physics experiments // Matter and Radiation at Extremes. – 2017. – T. 2. – C. 204–223. https://doi.org/10.1016/j.mre.2017.05.002
3. d'Almeida T. et al. Microsecond ramp compression of a metallic liner driven by a 5 MA current on the SPHINX machine using a dynamic load current multiplier pulse shaping // Physics of Plasmas. – 2013. – Ò. 20. – ¹. 9. https://doi.org/10.1063/1.4823720
4. Kokshenev V.A. et al. Investigation of the MPOS-LCM cascade scheme on the GIT-12 generator // Proceedings of 16th Symposium on High Current Electronics. Tomsk, Russia. – 2010. – C. 344-348.
5. Kokshenev V.A. Operating modes of the ferromagnetic core of the load current transformer in a cascade circuit on the GIT-12 generator //Proceedings of 9th International Congress on Energy Fluxes and Radiation Effects. Tomsk, Russia. – 2024. https://doi.org/10.56761/EFRE2024.S4-P-027203.
6. Chuvatin A.S. et al. Current multiplier to improve generator-to-load coupling for pulse-power generators // Review of scientific instruments. – 2005. – Ò. 76. – ¹. 6. https://doi.org/10.1063/1.1928450
7. Chuvatin A.S. et al. Operation of a load current multiplier on a nanosecond mega-ampere pulse forming line generator // Physical Review Special Topics–Accelerators and Beams. – 2010. – Ò. 13. – ¹. 1. – Ñ. 010401. https://doi.org/10.1103/PhysRevSTAB.13.010401
8. Chaikovsky S.A., Chuvatin A.S., Oreshin V.I. Load current transformer of the terawatt generator MIG // Instruments and experimental technique. – 2012. – ¹. 2. – Ñ. 67-76. (In Russian)
9. Chuvatin A.S. et al. Design criteria and validation of a vacuum load current multiplier on a mega-ampere microsecond inductive storage generator // Laser and Particle Beams. – 2010. – Ò. 28. – ¹. 3. – Ñ. 361-369. https://doi.org/10.1017/S0263034610000224
10. Kokshenev V.A. Vacuum Insulation of a Ferromagnetic Core in a Megaampere Load Current Multiplier // Proceedings of 25th International Symposium on Discharges and Electrical Insulation in Vacuum. Tomsk, Russia. – 2012. C. 433-436. https://doi.org/10.1109/DEIV.2012.6412548
11. Kokshenev V.A. Microsecond plasma opening switch: pro et contra // Proceedings of 25th International Symposium on Discharges and Electrical Insulation in Vacuum. Tomsk, Russia. – 2012. C. 437-440. https://doi.org/10.1109/DEIV.2012.6412549
12. Kokshenev V.A. Registration of currents and voltages in the MA-MV range on the GIT-12 generator. https://doi.org/10.56761/EFRE2024.S4-P-027202
13. Anan’ev C.C. et al. Transport properties of a high-current magnetically insulated transmission line and dynamics of the near-electrode plasma. // Plasma Physics. – 2008. – Ò. 34. – ¹. 7. – Ñ. 627-640. (In Russian)
14. Kovalev V.G. et al. Operation of a vacuum line with magnetic self-insulation at microsecond pulse durations // Journal of Technical Physics. – 1992. – Ò. 62. – ¹. 7. – Ñ. 121-133. (In Russian)
15. Belomytzev C. Ya. et al. Calculation of the characteristics of the magnetic self-insulation wave in a vacuum transmission line based on conservation laws. // Journal of Technical Physics. – 2006. – Ò. 76. – ¹. 11. – Ñ. 108-115. (In Russian)
16. Bergeron K.D. Equivalent circuit approach to long magnetically insulated transmission lines // Journal of Applied Physics. – 1977. – Ò. 48. – ¹. 7. – Ñ. 3065-3069. https://doi.org/10.1063/1.324075
17. Di Capua M.S., Pellinen D.G. Propagation of power pulses in magnetically insulated vacuum transmission lines // Journal of Applied Physics. – 1979. – Ò. 50. – ¹. 5. – Ñ. 3713-3720. https://doi.org/10.1063/1.326277
18. Madrid E.A. et al. Steady-state modeling of current loss in a post-hole convolute driven by high power magnetically insulated transmission lines // Physical Review Special Topics–Accelerators and Beams. – 2013. – Ò. 16. – ¹. 12. – Ñ. 120401. https://doi.org/10.1103/PhysRevSTAB.16.120401
19. Kokshenev V.A. et al. Plasma Radiation Source on the Basis of the Gas Puff with Outer Plasma Shell in the Circuit of a Mega-Ampere Load Current Doubler // Russian Physics Journal. – 2017. – Ò. 60. – ¹. 8. – Ñ. 1419-1424
20. Shishlov A.V. et al. Generation of Ar K-shell radiation using a hybrid gas puff with an outer plasma shell // Proceedings of 8th International Congress on Energy Fluxes and Radiation Effects. – 2022. https://doi.org/10.56761/EFRE2022.S2-O-011601
For citation:
Kokshenev V.A., Sinebrykhov V.A., Zherlitsyn A.A. Operating modes of the ferromagnetic core of the load current transformer in a cascade circuit on the GIT-12 generator // Journal of Radio Electronics. – 2025. – ¹. 11. https://doi.org/10.30898/1684-1719.2025.11.23 (In Russian)