Journal of Plasma and Fusion Research
Print ISSN : 0918-7928
Rapid Communications
Experimental Validation of Beam Particle Self Interaction in JT-60U by Use of N-NB
Kunihiko OKANOTakahiro SUZUKINaotaka UMEDARyoji HIWATARIKei MASAKIKenji TOBITATakaaki FUJITA
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2005 Volume 81 Issue 8 Pages 579-580

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Abstract

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 a 350 keV H0 beam, an indication of this BPSI effect was seen for the first time. In a low density discharge at about 1 × 1019 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.

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© 2005 by The Japan Society of Plasma Science and Nuclear Fusion Research
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