Experimental Validation of Beam Particle Self Interaction in JT-60U by Use of N-NB
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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 H<sup>0</sup> beam, an indication of this BPSI effect was seen for the first time. In a low density discharge at about 1 × 10<sup>19</sup> m<sup>-3</sup>, 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.
- Journal of Plasma and Fusion Research
Journal of Plasma and Fusion Research 81(8), 579-580, 2005-08-25
The Japan Society of Plasma Science and Nuclear Fusion Research