Experimental Study of Frequency Spectrum Characteristics in Spacecraft Dielectric Discharging
-
摘要: 空间电子辐射环境下,航天器介质的充放电效应是威胁航天器安全的重要因素.介质放电现象除与材料参数及构型相关外,还与空间电子环境密切相关.本文通过电子枪和Sr90放射源在地面实验装置上模拟空间电子辐照环境,测试了环氧树脂、聚四氟乙烯、聚酰亚胺等常见空间材料在不同温度、不同电子能量和电子束流强度影响下的放电脉冲,并对放电电流脉冲和电场脉冲进行频谱分析.实验分析结果表明,介质材料的放电电流脉冲频谱具有明显的单峰结构,该峰值与材料厚度和入射电子能量相关,但受材料温度和辐照束流强度影响不大.Abstract: Deep dielectric charging and discharging effect is one of the key factors threatening the spacecraft safety. Besides the dielectric and its grounding configuration, deep dielectric discharging is also affected by the electron environment in space. The space dielectrics such as FR4, Teflon and Polyimide were tested in a simulated space radiation environment on ground, and their discharging currents and electrical field pulses were recorded. By analyzing frequency spectrum characteristics of the discharging transients and the effect of dielectric temperature, electron energy and electron beam intensity, a peak frequency in discharging current was discovered. The result shows that the peak frequency varies with the dielectric thickness and electron energy, while no obvious change was observed at different beam intensities or temperatures.
-
[1] Lanzerotti L J, Breglia C, Maurer D W, et al. Studies of spacecraft charging on a geosynchronous telecommunications satellite[J]. Adv. Space Res., 1998, 22(1):79-82 [2] Frederickson A R, Benson C E, Bockman J F. Measurement of charge storage and leakage in polyimides[J]. Nucl. Instr. Meth. Phys. Res. B, 2003, 208:454-460 [3] H C Koons, J E Mazur, R S Selesnick, et al. The impact of the space environment on space systems[C]//Proceeding of the 6th Spacecraft Charging Technology Conference, AFRL-VS-TR-20001578, 20008. 7-11 [4] Huang Jianguo, Han Jianwei. Analysis of a typical internal charging induced spacecraft anomaly[J]. Acta Phys. Sin., 2010, 59(4):2907-2913. In Chinese (黄建国, 韩建伟. 航天器内部充放电效应及典型事例分析[J]. 物理学报, 2010, 59(4):2907-2913) [5] Bogorad A L, Likar J L, Voorhees C R, et al. Electrostatic discharge induced momentum pulses from charged spacecraft surfaces[J]. IEEE trans. Nucl. Sci., 2006, 53(6):3607-3609 [6] Velez J C M, Inguimbert V, Roussel J F, et al. ESDs on solar cell degradation, modeling and importance of the test setup[J]. IEEE trans. Plas. Sci., 2008, 36(5):2395-2403 [7] Guo Ce, Xue Bingsen, Lin Zhaoxiang. Approach for predicting the energetic electron flux in Geosynchronous Earth Orbit[J]. Chin. J. Space Sci., 2013, 33(4):418-426. In Chinese (郭策, 薛炳森, 林兆祥. 地球同步轨道高能电子通量预报方法 研究. 空间科学学报, 2013, 33(4):418-426) [8] Quan Ronghui, Han Jianwei, Zhang Zhenlong, et al. Experimental research and numerical simulation on deep charging for spacecraft dielectrics[J]. Chin. J. Space Sci., 2009, 29(6):609-614. In Chinese (全荣辉, 韩建伟, 张振龙, 等. 航天 器介质材料深层充放电实验与数值模拟[J]. 空间科学学报, 2009, 29(6):609-614) [9] Ryden K A, Morris P A, Rodgers D J, et al. Improved demonstration of internal charging hazard using Realistic Electron Environment Facility (REEF)[C]//Proceeding of the 8th SCTC, Huntsville: SCTS, 2003 [10] Quan Ronghui, Zhang Zhenlong, Han Jianwei. Experimental simulation of deep discharging in typical floating conductor structures of spacecraft[J]. Spacec. Envir. Eng., 2011, 28(1):21-24. In Chinese (全荣辉, 张振龙, 韩建伟. 航天器 典型悬浮导体结构深层放电现象的模拟实验研究[J]. 航天器环境工程, 2011, 28(1):21-24) [11] Gu C, Yan P, Shao T, Zhang S C. Fractal simulation of breakdown in dielectric[J]. High Voltage Eng., 2006, 32(1):1-4 [12] Peruani F, Solovey G. Irurzun I M, Mola E E. Dielectric breakdown model for composite materials[J]. Phys. Rev. E, 2003, 67(6):66-121 [13] Fasil V K, Karmakar S. Modeling and simulation based study for on-line detection of partial discharge of solid dielectric[C]//10th International Conference on the Properties and Applications of Dielectric Materials. Bangalore, India, 2012
点击查看大图
计量
- 文章访问数: 1213
- HTML全文浏览量: 67
- PDF下载量: 1598
- 被引次数: 0