关键词: 电喷雾推力器, 结构参数, 发射极, 粒子轨迹

Abstract: In order to improve the performance of electrospray thruster and beam extraction efficiency, the electric field distribution and particle trajectory of the electrospray thruster with different structural parameters are simulated via the COMSOL software. The results show that under the condition of a certain extraction voltage, the emitter tip field intensity is significantly affected by the emitter structure. It increases with the increase of the emitter rib width and rib spacing. The extraction grid structure has a significant effect on the beam extraction efficiency. Compared with the straight structure, the expansion structure has a better extraction efficiency. The increase of the width of the extraction grid hole is also conducive to the improvement of the extraction efficiency. The distance between the emitter and the extraction grid also has a great effect on the extraction efficiency, and reducing the distance between the two grids is beneficial to improve the extraction efficiency. The horizontal assembly error will obviously affect the trajectory of the emitted particles, but has little influence on the extraction efficiency.

Key words: electrospray thruster, structural parameters, emitters, particle trajectory