Research and Analysis on Laser-Induced Discharge Arc Characteristics of Spacecraft Solar Array

doi:10.16628/j.cnki.2095-8188.2024.02.001

Abstract

Abstract:

The discharge arc of solar array seriously threatens the reliable operation and safe life of spacecraft. Based on the discharge arc theory of solar array in space plasma environment, the discharge arc mechanism of high-energy pulse laser-induced solar array was analyzed. The discharge arc characteristics of solar array under three different working conditions were studied by using space discharge ground simulation experiment system. The energy density thresholds of laser-induced discharge arc under three working conditions were obtained, which were about 1.8×10⁸ W/cm², 1.45×10⁸W/cm² and1.08×10⁸ W/cm², respectively. In the Low-Earth-Orbit plasma environment, the probability of each pulse laser-induced discharge arc is about 60%, and the peak value of the laser-induced discharge arc current is 5.4 A, and the average duration is 16.68 μs, which is very easy to cause great harm to the solar array.

Key words: solar array, laser, plasma, discharge arc characteristics

CLC Number:

TM501.2

WEI Dejie, ZHU Liying, WU Jianwen, TONG Ziang. Research and Analysis on Laser-Induced Discharge Arc Characteristics of Spacecraft Solar Array[J]. LOW VOLTAGE APPARATUS, 2024, 0(2): 1-5.

Figures/Tables 10

References 17

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类型	参数	数值
环境参数	压强/Pa	5×10^-3
	等离子体密度/m^-3	1×10¹¹~1×10¹²
	电子温度/eV	2
激光参数	波长/nm	532
	脉宽/ns	5
	光斑直径/mm	1
电路参数	补偿电容C₁/nF	20
	补偿电容C₂/nF	20
	补偿电容C₃/nF	20
	保护电阻R_b/MΩ	10
	偏压电容C_ext/nF	50
	偏压电压U_b/V	220

脉冲激光能量/mJ	透过舷窗能量/mJ	能量密度/ (J·cm^-2)	功率密度/ (W·cm^-2)
4.3	3.65	0.46	9.29×10⁷
5.0	4.25	0.54	1.08×10⁸
6.7	5.70	0.73	1.45×10⁸
8.3	7.06	0.90	1.80×10⁸
10.0	8.50	1.08	2.17×10⁸
15.5	13.18	1.68	3.36×10⁸
20.9	17.77	2.26	4.53×10⁸
30.0	25.50	3.25	6.50×10⁸

参数	工况1			工况2			工况3
激光能量/mJ	8.3	10.0	15.5	6.7	8.3	10.0	5.0
放电持续时间/μs	8.16	10.01	11.33	10.02	11.31	12.41	16.68
放电电流峰值/A	0.98	1.04	1.06	1.60	1.63	1.71	5.40