中文摘要：

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 trapping coefficient which results in a reduced sheath thickness.In addition,magnetic field strength will influence the sheath potential distributions.

英文摘要：

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 trapping coefficient which results in a reduced sheath thickness. In addition, magnetic field strength will influence the sheath potential distributions.