Energetics of Propellant Options for High -Power Hall Thrusters
Energetics of Propellant Options for High -Power Hall Thrusters
复制标题
高功率霍尔推进器推进剂选择的能量学
DOI：
10.2514/1.16376
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发表时间：
2007
影响因子：
1.9
通讯作者：
L. B. King
中科院分区：
文献类型：
--
作者：
A. Kieckhafer;L. B. King
氪，镉，碘，铯，汞和铋在性能的几个领域，包括推力，比冲，电离概率，最大理论效率和溅射产量与氙进行了比较。较轻的推进剂，如氪和镉，有利于高比冲，低推力的应用，而较重的推进剂，如汞和铋，是优选的低比冲，高推力的任务。电离碰撞率的计算表明，铯的电离概率最高（电离能最低），氪的电离概率最低（电离能最高），其他推进剂的电离概率介于铯和氪之间。溅射腐蚀计算表明，对于碳表面，较重的原子在低离子能量（小于2000 eV）下溅射的次数比轻原子少，并且在每千克千克的基础上溅射的次数要少得多。
Krypton, cadmium, iodine, cesium, mercury, and bismuth are compared with xenon in several areas of performance, including thrust, specific impulse, probability of ionization, maximum theoretical efficiency, and sputter yield. The lighter propellants such as krypton and cadmium are favorable for high-Isp, low-thrust applications, whereas heavier propellants such as mercury and bismuth are preferable for low-Isp, high-thrust missions. Calculations of the ionizing collision rate show that cesium had the highest ionization probability (and lowest ionization energy), krypton had the lowest probability (and highest ionization energy), with the other propellant falling between cesium and krypton. Sputter erosion calculations show that for a carbon surface, heavier atoms will sputter less at low ion energies (less than 2000 eV) than light atoms, and will sputter much less on a kilograms-per-kilogram basis.