Chinese Space Science and Technology ›› 2020, Vol. 40 ›› Issue (4): 29-37.doi: 10.16708/j.cnki.1000-758X.2020.0042

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Effect of temperature on magnetic field configuration of magnetically shielded Hall thruster#br#

ZHAO Zhen,CHENG Jiabing,KANG Xiaolu   

  1. 1 Shanghai Institute of Space Propulsion, Shanghai201112, China
    2 Shanghai Engineering Research Center of Space Engine, Shanghai201112, China
  • Online:2020-08-25 Published:2020-07-20

Abstract: Magnetostatic simulation in room temperature condition is mostly applied for Hall thruster design and verified with measurement in non-working state. Severer thermal issues will be addressed for larger power Hall thrusters and result in magnetic deviation under high temperature. In order to study thermal influence, 10kW Hall thruster thermomagnetic coupling simulation was carried out. Comparing both results, discrepancy of magnetic radial component on Br centerline near anode was larger than that in exit. Magnetic shielding obtained in room temperature simulation was deviated in thermal state with non-compliance between field and wall up to 13%, through wall shape recorrection, magnetic shielding was restored with noncompliance below 4.8%. Reasonable design reduced thermal loads. Simulation showed that the maximal circuit temperature was less than 500℃, lower than 0.78 times of Curie temperature, which would not lead to sharp drop in magnetic performance, but thermal impact on magnetic configuration needs to be considered in magnetic shielding simulation.

Key words: magnetically shielded Hall thruster, magnetic simulation in room temperature condition, thermo-magnetic coupling simulation, optimal magnetic shielding configuration, non-compliance between magnetic field with ceramic wall