建立了螺旋波等离子体推进器中双层等离子体形成过程的一维全粒子PIC模型,讨论了放电过程中电子加热模型和等离子体膨胀模型,计算了不同条件下螺旋波等离子体推进器中双层等离子体的分布。结果表明：采用氩气工质,在射频电流90 A/m_{2和工作压强0.05~0.15 Pa的条件下,可产生双层等离子体,其密度为1.3×1015~2.8×1015 m-3,双层电势降为10~30 V,可加速氩离子束流,喷射速度为3~12 km/s,双层加速效应对推进器的性能具有一定影响。}

A one-dimensional full particle PIC model of the double-layer plasma forming process in helicon plasma thruster is established. A kind of electron heating model and plasma expansion model are discussed. And the distribution of double-layer plasma in helicon plasma thruster under different conditions is calculated. The results show that the double-layer plasma can be produced with argon under the condition of RF current of 90 A/m2 and working pressure of 0.05-0.15 Pa. The density is 1.3×10_{15-2.8×1015 m-3 and the potential drop of double-layer plasma is 10-30 V, which can accelerate argon ion beam to 3-12 km/s. Consequently, the double-layer acceleration effect can affect the performance of the thruster.}