Discharge Current Oscillation in Hall Thrusters
Discharge Current Oscillation in Hall Thrusters
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DOI：
10.2514/1.12759
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发表时间：
2005
影响因子：
1.9
通讯作者：
N. Yamamoto;K. Komurasaki;Y. Arakawa
中科院分区：
文献类型：
--
作者：
N. Yamamoto;K. Komurasaki;Y. Arakawa
为了扩大霍尔推力器的稳定工作范围，研究了霍尔推力器在10-100 kHz频率范围内的放电电流振荡。利用阳极层型和磁层型两种霍尔推力器测量了振荡幅度。发现振荡幅度对外加磁通密度敏感，这一结果表明振荡受电子迁移率的影响。根据实验结果建立了振荡模型，预测的振荡频率和稳定工作范围与实验结果定性一致。该模型表明，对应于等离子体波动的动量传递，即粘性效应，是实现稳定性的关键。因此，不同的加速通道配置的振荡幅度发散，平行，收敛测量，因为动量传递可能会受到影响的通道配置。该模型表明，通过在每种类型的霍尔推力器中采用收敛结构，成功地扩展了稳定的工作范围。
The discharge current oscillation at a frequency range of 10-100 kHz in Hall thrusters was investigated with the objective of extending their stable operational range. The amplitude of oscillation was measured using two types of Hall thrusters-the anode layer type and the magnetic layer type. The oscillation amplitude was found to be sensitive to the applied magnetic flux density, and this result indicated that the oscillation was affected by electron mobility. An oscillation model was proposed based on the experimental results, and the predicted frequency and stable operational range were found to agree qualitatively agreed with the experimental results. This model shows that the momentum transfer corresponding to plasma fluctuation, that is, the viscosity effect, is crucial to achieving stability. Thus, the oscillation amplitude for various acceleration channel configurations-divergent, parallel, and convergent-was measured because the momentum transfer could be affected by the channel configuration. The stable operational range was successfully extended by the adoption of the convergent configuration in each type of Hall thruster, as shown by this model.