RESEARCH AND DEVELOPMENT OF LOW-POWER HALL THRUSTERS WITH CIRCULAR-CROSS-SECTIONAL DISCHARGE CHAMBER, AND ITS INNER PHYSICAL PROCESSES

圆形断面放电室小功率霍尔推进器及其内部物理过程的研制

• 批准号: 16360420
• 负责人: TAHARA Hirokazu
• 金额: $ 9.34万
• 依托单位: OSAKA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360420/
• 关键词: HALL THRUSTER; ELECTRIC PROPULSION; SPACE PROPULSION; THRUST PERFORMANCE; PLASMA; LOW POWER; SMALL SATELLITE; 小電力; マイクロサテライト

Effects of magnetic field configuration in Hall thrusters with circular cross-sectional discharge chambers were examined using TCHT-3A and TCHT-3B series Hall thrusters. The results showed that by adjusting the position of peak of radial magnetic flux density the thrust performance was improved. As the position of peak of radial magnetic flux density shifts downstream, the ion loss to the wall and electron current to the anode decrease. However, propellant utilization also decreases because of neutral diffusion. Hence, the optimal position of peak exists.Plume measurements of Hall thruster with circular cross-sectional discharge chamber, named TCHT-2, were carried out. Ion current density measurement showed that the plume divergent angle was not sensitive to propellant mass flow rate and that the propellant utilization decreased as the mass flow rate decreased. Ion energy measurement using RPA indicated that the efficiency of acceleration decreased at low mass flow rate. From the electron temperature and plasma potential distribution inside the discharge chamber obtained by a double probe, the ionization/acceleration region is located at which strong radial magnetic field exists.The miniature Hall thruster TCHT-3A showed that thrust performance declined with scaling down by increase of ion loss. By applying strong radial magnetic field at the downstream region, miniature Hall thruster TCHT-3B achieved higher thrust performance than TCHT-3A did at low power level. It has efficiency (26-39%) in the power range 80-170W.

用TCHT-3A和TCHT-3B系列霍尔推进器研究了圆形截面放电室霍尔推进器中磁场结构的影响。结果表明，通过调整径向磁通密度峰值的位置，改善了推力性能。随着径向磁通密度峰值位置向下游移动，流向壁面的离子损失和流向阳极的电子电流减小。然而，由于中性扩散，推进剂利用率也会下降。对TCHT-2圆形截面放电室霍尔推力器进行了羽流测量。离子流密度测量表明，羽流发散角对推进剂质量流量不敏感，推进剂利用率随质量流量的减小而降低。用RPA测量离子能量表明，在低质量流量下，加速效率降低。从双探头测得的放电室内电子温度和等离子体电势分布可知，电离/加速区域位于径向磁场较强的区域。小型霍尔推进器TCHT-3A显示，随着离子损耗的增加，推力性能随尺度减小而下降。小型霍尔推力器TCHT-3B通过在下游施加强的径向磁场，在低功率下获得了比TCHT-3A更高的推力性能。它的效率在80-170W范围内(26%-39%)。

项目成果

Effects of Channel Wall Material on Performance and Plasma Characteristics of Hall Thrusters

• 发表时间: 2005
• 作者: H. Tahara;K. Imanaka

Performance Prediction of Hall Thrusters Using One-Dimensional Flowfield Calculation

使用一维流场计算预测霍尔推进器的性能

• 发表时间: 2004
• 期刊: 24^<th> Int.Symp. Space Technology and Science, ISTS 2004-b-53p
• 作者: Hirokazu Tahara;Seiro Yuge;Atsushi Shirasaki;Manuel Martinez-Sanchez
• 通讯作者: Manuel Martinez-Sanchez

Ground-Based Experiment of a Spacecraft Plasma Contactor Using a Hollow Cathode

使用空心阴极的航天器等离子体接触器的地面实验

• 发表时间: 2004
• 期刊: Vacuum 73,3-4
• 作者: Hirokazu Tahara;Seiro Yuge;Atsushi Shirasaki;Manuel Martinez-Sanchez;Hirokazu Tahara et al.;Hirokazu Tahara et al.
• 通讯作者: Hirokazu Tahara et al.

Influence of Magnetic Field Topography and Discharge Channel Structure on Performance of an Anode-Layer Hall Thruster

磁场形貌和放电通道结构对阳极层霍尔推进器性能的影响

• 发表时间: 2006
• 期刊: Proc. 25^<th> Int.Symp. Space Technology and Science, ISTS 2006-b-36
• 作者: Seiro Yuge;Hirokazu Tahara
• 通讯作者: Hirokazu Tahara

Basic study of electron collection by a bare-tether satellite

• DOI: 10.1016/j.vacuum.2003.12.102
• 发表时间: 2004-04
• 期刊: Vacuum
• 影响因子: 4
• 作者: H. Tahara;Hideki Nishio;T. Onishi