CAJ | 학술논문

对于低轨（160~500 km）航天器，如果加上适当装置使其可以直接加速轨道环境中自然存在的等离子体，则航天器将受到一个反向推力。有关这个设想的基本方案是在航天器上添加一个加有电压的平行双栅结构，利用双栅之间形成的电场来加速轨道环境中的等离子体。采用二维PIC方法对轨道稀薄等离子体在加速双栅中的运动进行数值模拟，结果表明：离子在栅极间被电场加速后，到达下游，由于后栅和鞘层之间的电场作用，将被减速，离子在整个过程中并没有被加速。利用在平行栅前增加一个离子势能提升区的办法可以解决这个问题。
대우저궤（160~500 km）항천기，여과가상괄당장치사기가이직접가속궤도배경중자연존재적등리자체，칙항천기장수도일개반향추력。유관저개설상적기본방안시재항천기상첨가일개가유전압적평행쌍책결구，이용쌍책지간형성적전장래가속궤도배경중적등리자체。채용이유PIC방법대궤도희박등리자체재가속쌍책중적운동진행수치모의，결과표명：리자재책겁간피전장가속후，도체하유，유우후책화초층지간적전장작용，장피감속，리자재정개과정중병몰유피가속。이용재평행책전증가일개리자세능제승구적판법가이해결저개문제。
Equipment affiliated to Leo spacecraft can be used to accelerate the plasma naturally existed in space and then acquire thrust. A basic scheme about this idea is to put two grids supplied with different electric potentials to create an acceleration region for plasma on the orbit. We simulate the motion of ambient rare plasmas in accelerating grids by two di-mensional PIC method. The simulation results show that the ions first have been accelerated by the electron field between the grids and then would be decelerated by the electron field between the back grid and the plasma sheath,which means the ions would not be accelerated in the whole process. The problem would be solved if an ion potential raising region was added in front of the grids.