Pulse Acoustic Technology for Measurement of Charge Distribution in Dielectric Materials for Spacecraft
Pulse Acoustic Technology for Measurement of Charge Distribution in Dielectric Materials for Spacecraft
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DOI：
10.1109/tps.2006.883289
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发表时间：
2006-10
影响因子：
1.5
通讯作者：
T. Takada;H. Miyake;Y. Tanaka
中科院分区：
文献类型：
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作者：
T. Takada;H. Miyake;Y. Tanaka
近年来，由于带电粒子辐照而引起的航天器充电事故时有报道。其中一些是由表面放电引起的，通常发生在太空中的等离子体环境中。其他一些似乎是由于在相对高海拔的环境中大量材料中电荷积累而引起的放电。为了研究大体积材料中的电荷积累，作者一直在开发一种内部电荷测量系统。利用所研制的系统，采用所谓的脉冲电声法和基于脉冲声学测量技术的压力波传播法，观察了人工放射线照射下电介质材料中的内部电荷积累。该系统适用于电子束、质子束和γ射线照射下空气气氛或真空环境中电介质中电荷分布的测量。利用该系统，我们测量了聚合物薄膜和玻璃材料中的体电荷分布。本文在简要介绍测量原理的基础上，对一些典型的测量结果进行了总结
Recently, some accidents in spacecraft due to charging up by irradiation of charged particles have been reported. Some of them are caused by a surface discharge, which normally takes place in a plasma environment in space. Some others seem to be caused by a discharge due to an accumulation of charge in the bulk of materials in a relatively high-altitude environment. To investigate the charge accumulation in the bulk of materials, the authors have been developing an internal charge measurement system. The internal charge accumulation in dielectric materials under irradiation of artificial radioactive rays is observed using the developed system, which employs the so-called pulsed electroacoustic method and pressure wave propagation method based on pulse acoustic measurement techniques. The developed system is applicable to the measurement of the charge distribution in dielectrics in air atmosphere or vacuum environments under electron beam, proton beam, and gamma ray irradiations. Using the system, we measured bulk charge distributions in polymeric films and glass materials. In this paper, summaries of some typical measurement results are presented following a brief explanation of measurement principles