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<p>Nested-channel Hall thrusters with anode layer (TAL) have the potential to improve their thrust-throttling characteristics and achieve further downsizing beyond conventional TALs. This study investigated the performance and discharge-oscillation characteristics of TMU-D058, a 1.5-kW-class double-channel TAL. During single-channel operation, it achieved a maximum anode efficiency of 49% at 507&#xa0;W for the inner channel and 49% at 855&#xa0;W for the outer one. However, the double-channel operation yielded a maximum anode efficiency of 29% at 591&#xa0;W, which was lower than that of the single-channel operation. The surge discharge current appeared periodically at a few kilohertz only during double-channel operations, possibly owing to channel interaction. This periodic surge current reduces the anode efficiency, particularly at higher power levels. The findings of this study, particularly the double-channel operation of TAL, will contribute to the realization of nested-channel TALs.</p>

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Performance and discharge oscillation of a 1.5-kW-class double-channel Hall thruster with anode layer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月9日

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  • Keita Nishii,
  • Taisei Nakajima,
  • Fuga Matsuo,
  • Nanami Takiguchi,
  • Akira Kakami

摘要

Nested-channel Hall thrusters with anode layer (TAL) have the potential to improve their thrust-throttling characteristics and achieve further downsizing beyond conventional TALs. This study investigated the performance and discharge-oscillation characteristics of TMU-D058, a 1.5-kW-class double-channel TAL. During single-channel operation, it achieved a maximum anode efficiency of 49% at 507 W for the inner channel and 49% at 855 W for the outer one. However, the double-channel operation yielded a maximum anode efficiency of 29% at 591 W, which was lower than that of the single-channel operation. The surge discharge current appeared periodically at a few kilohertz only during double-channel operations, possibly owing to channel interaction. This periodic surge current reduces the anode efficiency, particularly at higher power levels. The findings of this study, particularly the double-channel operation of TAL, will contribute to the realization of nested-channel TALs.