Numerical Simulation and Analysis of ECRIT Plasma Characteristics
In response to the issue that the ionization efficiency of the electron cyclotron resonance ion thruster(ECRIT)in spacecraft propulsion system is easily affected by the structural parame-ters and working parameters of the discharge chamber,and the coupling between the main tech-nical parameters cannot be optimized independently,the multi-physics simulation software is a-dopted to carry out numerical simulation in this paper.The adaptive function is used to refine the electron cyclotron resonance(ECR)grid method to improve the simulation accuracy,the influence of different magnetic circuit structure parameters,working gas,antenna configuration and micro-wave power on the performance of ECR thrusters is explored,so that electrons can obtain the maximum energy in the ECR region,which is partially verified by some tests(the influence of microwave input power and working medium gas on discharge).The results show that the mag-netic ring distance,the inner ring-waveguide small end distance and the magnet height have great influence on the ECR region distribution,while the width of the magnet has a relatively small in-fluence.The electron density of xenon is higher than that of argon gas.The electron density and power deposition of L-shaped antennas are higher than those of pole antennas.The electron num-ber density and collision power loss increase with the increase of incident microwave power,which can provide reference for the design of ECR thrusters.
spacecraft propulsion systemECRITelectromagnetic simulationmagnetic circuit structureworking gasantenna configurationmicrowave power
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