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Low energy (0.5-3 keV) fast neutral lithium beam source for edge plasma density measurements

M Ueda, R.R Silva, H Iguchi, J Fujita, K Kadota1997年Fusion Engineering and DesignIF 1.7出版社

AbstractA low energy (0.2–3 keV) fast neutral lithium beam source based on a glassy β-eucryptite Li+ source was developed for high spatial resolution (0.5 cm or less) density profile measurements in edge plasmas of tokamaks and stellarators. A 10-fold higher Li+ emission was obtained from this source as compared with the traditionally used pasty sources. Space charge effects became important for the ion beam propagation at such low energies, requiring careful beam control between the accelerator and the neutralizing section. In spite of this shortcoming, an approximately 40 μA cm−2 equivalent current Li0 beam at about 2 keV was obtained.

日本語訳

低エネルギー(0.2–3 keV)の高速中性リチウムビーム源を、ガラス状β-ユークリプタイトLi⁺源に基づいて開発し、トカマクおよびステラレータの周辺プラズマにおける高空間分解能(0.5 cm以下)の密度測定を実現した。従来使用されてきたペースト状源と比較して、この源からは10倍高いLi⁺放出が得られた。このような低エネルギーでは、イオンビーム伝播において空間電荷効果が重要となり、加速部と中和部の間での慎重なビーム制御が必要となった。この欠点にもかかわらず、約2 keVで約40 μA cm⁻²の等価電流のLi⁰ビームが得られた。

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Fusion Advanced Studies TorusLithiumEdge plasma
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