卫星介质深层充放电模拟实验装置研制进展
An Environmental Simulation Facility for Study of Deep Dielectric Charging on Satellites
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摘要: 文章介绍了深层充放电研究的国内外现状及中科院空间中心在研的卫星深层充放电实验模拟装置进展情况。锶90/钇90β放射源和5～100 keV电子枪被设计到一个真空系统内，分别作为介质深层充电及介质电导率的测试手段。分别用β放射源和电子枪对介质样品进行了辐照试验，观察到了kV级的充电电位和放电现象。在辐照样品之前进行的辐照空靶的实验均未观测到放电信号。该装置可为我国发展长寿命、高可靠的新一代通信、气象等中高轨卫星提供深层放电防护设计的基础数据、理论和技术支撑。
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关键词:
- 深层充放电；电介质；?放射源；电子枪
Abstract: The simulation facility described in this paper is the first of its kind under development in China for investigation of deep dielectric charging on satellites. A Sr90/Y90 beta emitting source and a 5~100 keV electron gun are integrated in a single vacuum chamber for simulating deep dielectric charging/discharging and for measuring the conductivity of dielectric materials, respectively. Irradiation tests on dielectric materials were conducted using the beta source and the electron gun, separately, in which some discharging waveforms were recorded as a result of a few kVs of surface charging on the sample. This facility is designed to provide a theoretical and technical support for future design against deep dielectric charging on China’s subsequent middle-and-high altitude Earth satellites.-
Keywords:
- deep dielectric charging
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