Pulse acoustic technology for measurement of charge distribution in dielectric materials for spacecraft

被引:49
作者
Takada, Tatsuo [1 ]
Miyake, Hiroaki [1 ]
Tanaka, Yasuhiro [1 ]
机构
[1] Musashi Inst Technol, Mech Syst Engn Dept, Yokohama, Kanagawa 2240015, Japan
关键词
electron beam; gamma ray; glass material; polymeric material; pressure wave propagation (PWP) method; proton; pulsed electroacoustic (PEA) method; radioactive ray; space charge;
D O I
10.1109/TPS.2006.883289
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
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.
引用
收藏
页码:2176 / 2184
页数:9
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