Improvement of Radio Frequency Plasma Cathode and its Application to Ion Thruster

射频等离子体阴极的改进及其在离子推进器中的应用

• 批准号: 22760625
• 负责人: AOYAGI Junichiro
• 金额: $ 2.66万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760625/
• 关键词: 高周波放電プラズマ; 電子源; 中和器; 点火特性; 電子放出特性; イオン推進機; 高周波放電プラズマ; 電子源; 中和器; 点火特性; 電子放出特性; イオン推進機

In order to improve performances of radio frequency plasma cathode, ignition capability and electron emission characteristics were investigated, parametrically. Moreover, plasma diagnostic in a cathode chamber was carried out. It was cleared that the pressure in the chamber and the electric field formed by an electrode for ion collection were dominant to the ignition. In addition, it was also revealed that there exists an optimum pressure for electron emission, where depends on saturation current of ion and/or electron. On the basis of the results, a new cathode was designed, constructed and demonstrated. As the result, electric power consumption was reduced by half for equivalent electron emission. This study will be valuable for practical application to the ion thruster or its neutralizer.

为了提高射频等离子体阴极的性能，参数研究了点火能力和电子发射特性。此外，进行了阴极腔中的血浆诊断。可以清楚地看出，由离子收集的电极形成的腔室和电场的压力主要是点火开关。另外，还揭示了电子发射的最佳压力，其中取决于离子和/或电子的饱和电流。根据结果​​，设计，构建和证明了新的阴极。结果，对于等效电子发射，电力消耗降低了一半。这项研究对于在离子推进器或其中和器中的实际应用非常有价值。