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束流引出区中小负离子束宽度和轴偏转对射频场的响应。

Response of negative ion beamlet width and axis deflection to RF field in beam extraction region.

作者信息

Nagaoka Kenichi, Nakano Haruhisa, Hamajima Taiga, Nakamoto Ryoya, Tsumori Katsuyoshi, Osakabe Masaki, Kisaki Masashi, Miyamoto Kenji, Takahashi Kazunori, Fantz Ursel

机构信息

National Institute for Fusion Science, Toki, 509-5292, Japan.

Nagoya University, Nagoya, 464-8602, Japan.

出版信息

Sci Rep. 2025 Jan 16;15(1):1494. doi: 10.1038/s41598-024-81334-w.

DOI:10.1038/s41598-024-81334-w
PMID:39820748
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11739601/
Abstract

Beam-divergence characteristics of single negative ion beamlet have been experimentally investigated with a superimposition of a controlled perturbation of a radio frequency wave (RF) field in a filament-arc discharge negative ion source. Oscillations of a negative-ion beamlet width and axis responding to the RF perturbation were observed, which may be a cause of the larger beam divergence angle of the RF negative ion source for ITER. It is pointed out that the oscillation of the beamlet width depends on the perveance and on an RF frequency such that the oscillation is suppressed at perveance-matched conditions and at low RF frequency.

摘要

在丝状电弧放电负离子源中，通过叠加射频（RF）场的受控扰动，对单负离子微束的束发散特性进行了实验研究。观察到负离子微束宽度和轴对RF扰动的振荡，这可能是ITER射频负离子源束发散角较大的原因。指出微束宽度的振荡取决于导流系数和RF频率，使得在导流系数匹配条件和低RF频率下振荡受到抑制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/790ddbd1e729/41598_2024_81334_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/6fd9b2cba58f/41598_2024_81334_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/9abcdfa772a8/41598_2024_81334_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/e08a5949e141/41598_2024_81334_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/28ab831d51e9/41598_2024_81334_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/790ddbd1e729/41598_2024_81334_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/6fd9b2cba58f/41598_2024_81334_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/9abcdfa772a8/41598_2024_81334_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/e08a5949e141/41598_2024_81334_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/28ab831d51e9/41598_2024_81334_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/028c/11739601/790ddbd1e729/41598_2024_81334_Fig5_HTML.jpg

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本文引用的文献

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Neutral beam injection with an improved accelerator for LHD.
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