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衛(wèi)星介質(zhì)深層充放電模擬實驗裝置研制進(jìn)展

An Environmental Simulation Facility for Study of Deep Dielectric Charging on Satellites

  • 摘要: 文章介紹了深層充放電研究的國內(nèi)外現(xiàn)狀及中科院空間中心在研的衛(wèi)星深層充放電實驗?zāi)M裝置進(jìn)展情況。鍶90/釔90β放射源和5～100 keV電子槍被設(shè)計到一個真空系統(tǒng)內(nèi)，分別作為介質(zhì)深層充電及介質(zhì)電導(dǎo)率的測試手段。分別用β放射源和電子槍對介質(zhì)樣品進(jìn)行了輻照試驗，觀察到了kV級的充電電位和放電現(xiàn)象。在輻照樣品之前進(jìn)行的輻照空靶的實驗均未觀測到放電信號。該裝置可為我國發(fā)展長壽命、高可靠的新一代通信、氣象等中高軌衛(wèi)星提供深層放電防護(hù)設(shè)計的基礎(chǔ)數(shù)據(jù)、理論和技術(shù)支撐。

     

    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.

     

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