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以高亮度半导体激光器或玻璃光纤激光器作能源的微型激光等离子体推进器(μLPT)是高效、长寿命、低推力脉冲火箭发动机。它使用简单的低电压半导体开关驱动激光器,截止态电功率为零。首次给出微型激光等离子体推进器实验演示;单推力幅度复盖5个数量级,从40mdyn-S(<1nN-S,1dyn-S=10~(-5)N-S)到2dyn-S。比推力高达1800s,耦合效率达25dyn-S/J。研究了几种靶材料。初始应用是供微卫星和纳卫星的定位和寿命结束时再入。现在开发的原型发动机预期寿命输出约5×10~7dyn-S(500N-S),足够再入5kg低地球轨道(LEO)卫星。
Micro-laser plasma thrusters (μLPT), which use high-brightness semiconductor lasers or glass fiber lasers as energy sources, are highly efficient, long-life, low-thrust pulsed rocket engines. It uses a simple low-voltage semiconductor switch to drive the laser with an off-state electrical power of zero. The experimental demonstration of the miniature laser plasma thruster is given for the first time. The single thrust amplitude covers 5 orders of magnitude, from 40mdyn-S (<1nN-S, 1dyn-S = 10-5N-S) to 2dyn-S. Specific thrust up to 1800s, coupling efficiency of 25dyn-S / J. Several target materials were studied. The initial application is for microsatellites and nanosatellites positioning and reentry at the end of life. The prototype engine now being developed has a life expectancy of about 5 × 10 ~ 7dyn-S (500N-S), enough to re-enter 5kg Low Earth Orbit (LEO) satellites.