Abstract: Electron cyclotron resonance thruster has the advantages of cathodeless operation, high specific impulse and simple structure which make the thruster very attractive for deep space exploration.Its discharge chamber is the key component,in which the working media of electron cyclotron resonance plasma is produced.The magnetic and high-frequency electromagnetic field in the chamber are very important for thruster startup and stable operation.Hence the numerical simulation and analysis of the fields are very important.Three models with different materials of l Ocm discharge chamber for magnetic and high-frequency electromagnetic field calculation were established with finite element analysis software.With the models,the field distribution was calculated and analyzed.The results show that the location of electron cyclotron resonance surface in each model is appropriate,but the soft ion style is better.The electron cyclotron resonance surface overlaps the maximum microwave electric field region,through which the plasma was formed reliably.

Key words: Electron cyclotron resonance thruster, Static magnetic field, High-frequency, electromagnetic field, Specific impulse, Finite element analysis, Deep space probe