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Electron heating by ion Bernstein wave in the HT-7 tokamak

Y P Zhao, J Li, J R Luo, B N Wan, Y Z Mao, Y Bao, B L Lin, X Z Gong, X Gao, X K Yang2001年Plasma Physics and Controlled FusionIF 2.2出版社

Ion Bernstein wave (IBW) heating has been investigated in the HT-7superconducting tokamak. Electron heating mode was concentrated ondeuterium plasma with an injecting power to 320 kW. The bulk electrontemperature showed a significant rise with a heating factor, ΔTe×ne/PRF, up to 9.4 eV×1013 cm-3 kW-1. The direct electron heating via electron Landau damping from IBWhas been demonstrated after intensive RF wall conditioning. Both on-axis andoff-axis electron heating were obtained. Electron temperature profile wasmodified by IBW under different plasma conditions. Edge density showed nosharp drop during IBW heating. Plasma density and temperature remainedalmost unchanged in front of antenna. But edge temperature and densityinside of plasma visibly increased and their profiles became steeper.Particle confinement improvement was observed by IBW.

日本語訳

イオン・バーンシュタイン波(IBW)加熱がHT-7超伝導トカマクにおいて研究された。電子加熱モードは、320 kWまでの入射電力を用いた重水素プラズマに集中した。バルク電子温度は、加熱係数ΔTe×ne/PRFが9.4 eV×1013 cm-3 kW-1に達する顕著な上昇を示した。集中的なRF壁コンディショニング後、IBWからの電子ランダウ減衰による直接電子加熱が実証された。オン軸およびオフ軸の両方の電子加熱が達成された。電子温度分布は、異なるプラズマ条件下でIBWにより変更された。IBW加熱中、エッジ密度は急激な低下を示さなかった。アンテナ前方のプラズマ密度と温度はほぼ不変のままであった。しかし、プラズマ内部のエッジ温度と密度は目に見えて増加し、それらの分布はより急峻になった。IBWによる粒子閉じ込めの改善が観測された。

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Bernstein waveHT-7Electron heatingIon Bernstein wave
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