51. Numerical Analysis of Plasma inside a Hollow Cathode
- Author
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TOMINAGA, Daiki, ARIWA, Yuichiro, NONAKA, Masahiro, OKURA, Takumi, KOIZUMI, Yuki, SATO, Ginga, KAISE, Tomohiro, and YOKOTA, Shigeru
- Abstract
令和4年度宇宙輸送シンポジウム（2023年1月12日-13日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)) , 相模原市, 神奈川県, Space Transportation Symposium FY2022 (January 12-13, 2023. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, Numerical analysis of the plasma state inside the hollow cathode was used to investigate changes in the state depending on the operating conditions. The analytical method used was the Full-PIC(Full Particle-In-Cell) method. The electron number density distribution inside the hollow cathode changed when the working gas inflow rate was changed from 1.36×10-6[kg/s] to 0.68×10-6[kg/s]. When the working gas flow rate was 0.68×10-6[kg/s], the electron number density inside the hollow cathode dropped significantly. The cause of this phenomenon is thought to be the unsteady operation of the hollow cathode due to insufficient working gas flow. Oscillations of the discharge current were also observed, suggesting that unsteady operation is occurring. In previous studies, unsteady operation was expected to be related to an increase or decrease in the amount of electrons inside the hollow cathode. In the present study, the increase and decrease in the amount of electrons and the number of ionization collisions were also confirmed, and the analytical solution was consistent with the predictions of the previous study. In addition, previous studies have shown that the electron number density inside the hollow cathode increases as it gets closer to the orifice, and we confirmed the same phenomenon in the numerical analysis., 資料番号: SA6000184094, STEP-2022-042
- Published
- 2023