Experimental validation of beam particle self interaction in JT-60U by use of N-NB

Okano, Kunihiko*; Suzuki, Takahiro; Umeda, Naotaka; Hiwatari, Ryoji*; Masaki, Kei; Tobita, Kenji; Fujita, Takaaki

In a toroidal system, circulating fast ions generated by neutral beam injection affect the beam stopping cross-section of the neutral beam itself. This effect is called "beam particle self-interaction (BPSI)". In a recent experiment in JT-60U with 350 keV H $^{0}$ beam, an indication of this BPSI effect has been found for the first time. In a low density discharge at about 110 $^{19}$ m $^{-3}$ , the beam shine-through decreased by about 35% within several hundred msec after beam injection. This result is consistent with a prediction by the BPSI theory.

Language	:	English
Journal	:	Purazuma, Kaku Yugo Gakkai-Shi
Volume	:	81
Number	:	8
Pages	:	p.579 - 580
Publication Year/Month	:	2005/08
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Paper URL	:	http://ci.nii.ac.jp/naid/110006281958
DOI for research data	:
Keywords	:	ビーム粒子自己相互作用; BPSI; 高速イオン; 電流駆動; 電流立ち上げ; 突き抜け; イオン化断面積; 中性粒子ビーム; 負イオン源; JT-60U
Research Facility	:	JT-60(臨界プラズマ試験装置)
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Article of JAEA R&D Review	:
Cooperating Institute	:	電力中央研究所

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Registration No. : A20050156
JAEA Abstracts No. : 330972
Paper Submission No. : 65

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