The Electromagnetic Simulation And Experimental Research Of Electron Cyclotron Resonance Plasma Thruster

The electron cyclotron resonance plasma is a magnetized plasma with high density,low temperature and low pressure.In the magnetic field,the electrons do cyclotron movement around the magnetic field lines.When the incident microwave power frequency and electron cyclotron angle frequency are equal,the electron cyclotron resonance effect will be produced.Under low pressure conditions,the ideal electron cyclotron resonance plasma density can reach 1017?1019m-3.In the area of cyclotron resonance effect,the ionization rate is extremely high,the bipolar electric field effect and the magnetic nozzle principle can accelerate the plasma jet and produce thrust.As the electron cyclotron resonant plasma thruster is a new type of electromagnetic thruster,the study of its working principle is necessary.Based on the valuable research experience and the theory of electric propulsion at home and abroad,this paper summarizes the discharge,the transmission theory and the acceleration mechanism involved in the electron cyclotron resonance plasma thruster.This paper carries out the simulation calculation of the plasma physical characteristics parameters in the discharge chamber,and designs the electron cyclotron resonance plasma thruster prototype.We use DLUT electric propulsion laboratory high vacuum electric propulsion experiment platform to observe the discharge phenomenon.The specific contents of this paper are as follows:Compared to traditional chemical propulsion,advanced chemical propulsion and several advanced space propulsion technologies have been ahead of performance indicators,In this paper,the characteristics of these propulsion technologies are described in detail,highlighting the importance of electric propulsion compared to other propulsion techniques and the potential of development,then leads to the characteristics of electron cyclotron resonance plasma thruster and the wide application prospect in electric propulsion.This paper describes the working principle of the electron cyclotron resonance plasma thruster,including electron cyclotron resonance effect and magnetic nozzle theory,and summarizes the probe diagnosis theory of electron cyclotron resonance plasma thruster in the plume.Based on COMSOL Multiphysics finite element simulation software,the static magnetic field model and the microwave electromagnetic field model of the discharge chamber were established.By the method of separation of variables,we change the corresponding parameters and obtain the spatial distributions of electronic density,electronic temperature and collision power loss inside the discharge chamber.The experiment was carried out on the experimental platform of high vacuum electric propulsion of DLUT,and the different discharge effects were observed under different experimental conditions.It is concluded that with the increasing of mass flow rate and the microwave incident power,the energy obtained by electrons increases,the collision of neutral particles makes more neutral particles ionize and the number of electrons become larger.Finally,the Langmuir single probe is used to diagnose the plume region of the electron cyclotron resonance plasma thruster,obtaining the corresponding plasma ?-? curve and the plasma parameter.