低功率霍尔推力器束流发散和推力矢量偏心特性研究

Beam Divergence and Thrust Vector Deviation Characteristics of Low-Power Hall Thruster

关键词:  混合励磁  低功率  霍尔推力器  束流发散  推力矢量

Key words:  Bybrid excitation  Low power  Hall thruster  Beam divergence  Thrust vector

摘要:

为了准确掌握不同工况下混合励磁模式低功率霍尔推力器束流发散和推力矢量偏心特性，凭借自主设计和改进的一套快速评估霍尔推力器束流发散角和推力矢量偏角原位集成诊断装置，系统研究了推力器在不同阳极质量流率、磁场、电场下束流分布和推力矢量偏心特性的变化规律。结果表明，束流发散角随阳极质量流率（0.65~0.95mg/s）和磁场强度（112~142Gs）的变化呈现负相关的特性。当阳极质量流率为0.95mg/s时，束流发散角降到29.1°（<30°），推力矢量偏角随阳极质量流率和磁场强度的变化分别存在极大值（1.19°）和极小值（0.91°）。束流发散角、推力矢量偏角在放电电压为250~330V时基本保持不变。

Abstract:

In order to accurately master the beam divergence and thrust vector deviation characteristics of low power Hall thruster with the bybrid excitation mode under different working conditions，a set of beam divergence angle and thrust vector deviation angle in-situ integrated diagnosis equipment was designed and improved independently which was systematically evaluated the beam current distribution and thrust vector eccentricity characteristics under different anode mass flow rates，magnetic fields，and electric fields. The test results show that the beam divergence angle is negatively correlated with anode mass flow rate （0.65~0.95mg/s） and magnetic field intensity （112~142Gs）.The beam divergence angle drops to 29.1° （<30°） when the anode flow rate is 0.95mg/s. The thrust vector deviation angle has a maximum （1.19°） and minimum （0.91°） with the variations of anode mass flow rate and magnetic field intensity. However，the beam divergence angle and thrust vector deviation angle remain basically constant over the discharge voltage range of 250V~330V.