Numerical study on discharge characteristics influenced by secondary electron emission in capacitive RF argon glow discharges by fluid modeling

• 来源期刊: 中国物理B（英文版）
• 关键词: RF glow discharge secondary electron emission fluid model
• 年，卷（期）: 2018,（2）
• 页码范围: 415-422
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/2/025201

摘要

A one-dimensional (1D) fluid model of capacitive RF argon glow discharges between two parallel-plate electrodes at low pressure is employed.The influence of the secondary electron emission on the plasma characteristics in the discharges is investigated numerically by the model.The results show that as the secondary electron emission coefficient increases,the cycle-averaged electric field has almost no change;the cycle-averaged electron temperature in the bulk plasma almost does not change,but it increases in the two sheath regions;the cycle-averaged ionization rate,electron density,electron current density,ion current density,and total current density all increase.Also,the cycle-averaged secondary electron fluxes on the surfaces of the electrodes increase as the secondary electron emission coefficient increases.The evolutions of the electron flux,the secondary electron flux and the ion flux on the powered electrode increase as the secondary electron emission coefficient increases.The cycle-averaged electron pressure heating,electron Ohmic heating,electron heating,and ion heating in the two sheath regions increase as the secondary electron emission coefficient increases.The cycle-averaged electron energy loss increases with increasing secondary electron emission coefficient.