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Fast-time-resolution charge-exchange measurements during the 'fishbone' instability in the poloidal divertor experiment

P. Beiersdorfer, R. Kaita, R.J. Goldston1984年被引用 21Nuclear FusionIF 3出版社

Measurements of fast-ion losses due to the 'fishbone' instability during high-βTq neutral-beam-heated discharges in the Poloidal Divertor Experiment have been made using two new vertical-viewing charge-exchange analysers. The measurements show that the instability has an n = 1 toroidal mode number, and that it ejects beam ions in a toroidally rotating bacon directed outward along a major radius. Observations of ejected ions with energies up to twice the beam injection energy at R ≈ Ro + a indicate the presence of a non-μ-conserving acceleration mechanism.

日本語訳

高速βTq中性粒子ビーム加熱放電中のポロイダルダイバータ実験において、「フィッシュボーン」不安定性による高速イオン損失の測定が、2台の新しい垂直視野荷電交換分析器を用いて行われた。測定により、この不安定性はn = 1のトロイダルモード数を有し、ビームイオンをトロイダル方向に回転しながら主半径に沿って外側へ放出することが示された。R ≈ Ro + aにおけるビーム入射エネルギーの2倍までのエネルギーを持つ放出イオンの観測は、μ非保存の加速機構の存在を示している。

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