Simulation of main plasma parameters of a cylindrical asymmetric capacitively coupled plasma micro-thruster using computational fluid dynamics

Frontiers in Physics

Boswell, Roderick W.¹  Charles, Christine¹  Greig, Amelia¹ 

[1] Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Canberra, ACT, Australia

关键词: plasma thruster;    computational fluid dynamics;    radiofrequency plasmas;    micro-discharge;    electric propulsion;   

DOI  :  10.3389/fphy.2014.00080

学科分类：物理（综合）

来源: Frontiers

【 摘 要 】

Computational fluid dynamics (CFD) simulations of a radio-frequency (13.56 MHz) electro-thermal capacitively coupled plasma (CCP) micro-thruster have been performed using the commercial CFD-ACE+ package. Standard operating conditions of a 10 W, 1.5 Torr argon discharge were used to compare with previously obtained experimental results for validation. Results show that the driving force behind plasma production within the thruster is ion-induced secondary electrons ejected from the surface of the discharge tube, accelerated through the sheath to electron temperatures up to 33.5 eV. The secondary electron coefficient was varied to determine the effect on the discharge, with results showing that full breakdown of the discharge did not occur for coefficients coefficients less than or equal to 0.01.

【 授权许可】

CC BY