Modification of spacecraft potentials by thermal electron emission on ATS-5
Modification of spacecraft potentials by thermal electron emission on ATS-5
复制标题
通过 ATS-5 上的热电子发射改变航天器电势
DOI：
10.2514/3.28068
复制
发表时间：
1981
期刊：
影响因子：
--
通讯作者：
R. Olsen
中科院分区：
文献类型：
--
作者：
R. Olsen
本文报道和分析了应用技术卫星5号上热电子发射器的电子发射实验。在日食充电环境中的操作表明，电子发射可以部分放电带负电荷的卫星。典型的操作导致千伏电位在几十秒内降低到数百伏，然后在几分钟内逐渐充电。用一维电流平衡模型模拟平衡电流。发现1微安量级的电流，显著低于发射极能力。一个三维的、随时间变化的计算机模型的应用表明，太阳能电池阵列上的差分充电限制了发射电流，阻止了卫星的完全放电，并允许它在电子发射器的情况下充电。
Electron emission experiments on Applied Technology Satellite 5 using a thermal electron emitter are reported and analyzed. Operations in eclipse charging environments showed that electron emission could partially discharge a negatively charged satellite. Typical operations resulted in kilovolt potentials being reduced to hundreds of volts for a few tens of seconds, followed by a gradual recharging over a period of minutes. Equilibrium currents were modeled with a one-dimensional current balance model. Currents on the order of 1 microampere were found, significantly below emitter capabilities. Application of a three-dimensional, time-dependent computer model showed that differential charging on the solar arrays was limiting the emitted current, preventing the complete discharge of the satellite, and allowing it to recharge in spite of the electron emitter.