Mass focusing and particle trajectories of particle beam in orthogonal electromagnetic field

Hailong, 赵海龙 Zhao; Hongchen, 刘洪臣 Liu; Chunsheng, 王春生 Wang; Le, 张乐 Zhang; Binhao, 江滨浩 Jiang

doi:10.3788/hplpb20152705.54001

Cited by 2 publications

(1 citation statement)

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“…The mass flow rate of the 20 A emission current hollow cathode is 0.2 mg s −1 and the exit pressure is about 450 Pa, as measured by a flowmeter. According to the results from a previous study [5], the entrance pressure of the cathode tube and the exit pressure of orifice are 260.5 Pa and 76 Pa, respectively. As the gas in the supply tube is a viscous fluid, the simulations of the pressure distribution, xenon velocity and neutral atom density in the discharge region of the hollow cathode are performed by using COMSOL multiphysics software and the results are shown in figures 2(a)-(c) with the assumption that there is a steady flow of gas.…”

Section: Initial Conditions Of the Discharge Regionmentioning

confidence: 86%

Plasma characteristics in the discharge region of a 20 A emission current hollow cathode

Sun

Zhang

Wen

et al. 2017

Plasma Sci. Technol.

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Numerical calculation and fluid simulation methods were used to obtain the plasma characteristics in the discharge region of the LIPS-300 ion thruster's 20 A emission current hollow cathode and to verify the structural design of the emitter. The results of the two methods indicated that the highest plasma density and electron temperature, which improved significantly in the orifice region, were located in the discharge region of the hollow cathode. The magnitude of plasma density was about 10 21 m −3 in the emitter and orifice regions, as obtained by numerical calculations, but decreased exponentially in the plume region with the distance from the orifice exit. Meanwhile, compared to the emitter region, the electron temperature and current improved by about 36% in the orifice region. The hollow cathode performance test results were in good agreement with the numerical calculation results, which proved that that the structural design of the emitter and the orifice met the requirements of a 20 A emission current. The numerical calculation method can be used to estimate plasma characteristics in the preliminary design stage of hollow cathodes.

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Section: Initial Conditions Of the Discharge Regionmentioning

confidence: 86%