Characteristics of a Sheath with Secondary Electron Emission in the Double Walls of a Hall Thruster

DUAN Ping(段萍); LI Xi (李肸); SHEN Hongjuan (沈鸿娟); CHEN Long (陈龙); E Peng (鄂鹏)

doi:10.1088/1009-0630/14/9/12

Plasma Science and Technology > 2012 > 14(9): 837-841. > DOI: 10.1088/1009-0630/14/9/12

DUAN Ping(段萍), LI Xi (李肸), SHEN Hongjuan (沈鸿娟), CHEN Long (陈龙), E Peng (鄂鹏). Characteristics of a Sheath with Secondary Electron Emission in the Double Walls of a Hall Thruster[J]. Plasma Science and Technology, 2012, 14(9): 837-841. DOI: 10.1088/1009-0630/14/9/12

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Characteristics of a Sheath with Secondary Electron Emission in the Double Walls of a Hall Thruster

1 Department of Physics, Dalian Maritime University, Dalian 116026, China 2 College of Physics Science and Technology, Dalian University, Dalian 116622, China 3 School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China 4 Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China

Funds: Supported by the National Natural Science Foundation of China (Nos. 10975026, 10875024, 11005025), the Scientific Research Program of the Education Bureau of Liaoning Province, China (No. 2009A047), and the State Key Development for Basic Research of China (Nos. 2009GB105004, 2009GB106002).

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Abstract

Abstract

In order to investigate the effects of secondary electrons, which are emitted from the wall, on the performance of a thruster, a one-dimensional fluid model of the plasma sheath in double walls is applied to study the characteristics of a magnetized sheath. The effects of secondary electron emission (SEE) coefficients and trapping coefficients, as well as magnetic field, on the structure of the plasma sheath are investigated. The results show that sheath potential and wall potential rise with the increment of SEE coefficient and tripping coefficient which results in a reduced sheath thickness. In addition, magnetic field strength will influence the sheath potential distributions.
- hall thruster,
- magnetized sheath,
- secondary electron

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