کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6744708 | 1429330 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Response of Hâ ions to extraction field in a negative hydrogen ion source
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
In order to investigated the dynamics of Hâ ions and understand the extraction process inside filament-arc-driven plasmas in a Cs-seeded negative ion source, diagnostic experiments using a directional Langmuir probe combined with photodetachment measurement have been conducted. Two-dimensional flow pattern of Hâ ion flow has been obtained as well as the profile of Hâ ion density. The result shows that Hâ ions come from the direction of plasma grid surface, flow to the plasma in the extraction region. During beam extraction, Hâ ion flow turns to the beam direction. The stagnation point of Hâ ion flow is at â¼20Â mm apart from the plasma grid. Around the stagnation point, the maximum decrement of Hâ density caused by beam extraction appears. The results indicate that Hâ ions are extracted from the plasma volume. The extraction process occurs in a region near the plasma grid aperture with boundary of â¼20Â mm apart from the plasma gird.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 123, November 2017, Pages 481-484
Journal: Fusion Engineering and Design - Volume 123, November 2017, Pages 481-484
نویسندگان
S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, M. Osakabe, K. Nagaoka, Y. Takeiri, M. Shibuya,