An 18.3 MJ charging and discharging pulsed power supply system for the space plasma environment research facility (SPERF): the subsystem for the magnetic mirror coil

Peng E; Jian Guan; Xun Ma; Wenbin Ling; Weijun Deng; Mingjun Ding; Chuanhui Kang; Juan Zhao; Hongtao Li; Weiming Tong; Liyi Li

doi:10.1063/5.0131492

An 18.3 MJ charging and discharging pulsed power supply system for the space plasma environment research facility (SPERF): the subsystem for the magnetic mirror coil

Rev Sci Instrum. 2023 Apr 1;94(4):044710. doi: 10.1063/5.0131492.

Authors

Peng E¹, Jian Guan², Xun Ma³, Wenbin Ling¹, Weijun Deng³, Mingjun Ding³, Chuanhui Kang³, Juan Zhao³, Hongtao Li³, Weiming Tong¹, Liyi Li¹

Affiliations

¹ Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China.
² School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China.
³ Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, Mianyang 621900, Sichuan, China.

PMID: 38081280
DOI: 10.1063/5.0131492

Abstract

The magnetic reconnection process relevant to that at the magnetotail is one of the research contents of the Space Plasma Environment Research Facility, which is under construction at the Harbin Institute of Technology in China. Two magnetic mirror sub-coils placed symmetrically in the vertical direction and connected in series cooperate with a dipole coil to generate a magnetic field environment similar to the Earth's magnetotail. A capacitor-based pulsed power supply (PPS) system with a modular design is developed to excite two magnetic mirror sub-coils to generate a magnetic field with a magnetic flux density of not less than 200 G at the center of the two sub-coils. The PPS should deliver a pulsed current with a peak of more than 8 kA, and the duration of the current not be less than 95% of the peak over 5 ms to two magnetic mirror sub-coils when the charging voltage is not less than 20 kV. In addition, the duration from the peak to 10% of the peak is not more than 130 ms. The detailed design of the PPS is discussed in this paper, and a test method is designed to reduce the risk of damage to the wires and the connection between the wires and the coaxial cables of the PPS when the PPS discharges at a higher charging voltage. Finally, the discharge test of the PPS is carried out to verify the design of the PPS.