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Creation and control of variably shaped plasmas in TCV

F Hofmann, J B Lister, W Anton, S Barry, R Behn, S Bernel, G Besson, F Buhlmann, R Chavan, M Corboz1994年Plasma Physics and Controlled FusionIF 2.2出版社

During the first year of operation, the TCV tokamak has produced a large variety of plasma shapes and magnetic configurations, with 1.0<or=Btor<or=1.46 T, Ip<or=800 kA, kappa <or=2.05, -0.7<or= delta <or=0.7. A new shape control algorithm, based on finite element reconstruction of the plasma current in real time, has been implemented. Vertical growth rates of 800 sec-1 corresponding to a stability margin f=1.15, have been stabilized. Ohmic H-modes, with energy confinement times reaching 80 ms, normalized beta ( beta toraB/Ip) of 1.9 and tau E/ITER89-P of 2.4 have been obtained in single-null X-point deuterium discharges with the ion grad B drift towards the X-point. Limiter H-modes with maximum line averaged electron densities of 1.7*1020m-3 have been observed in D-shaped plasmas with 360 kA<or=Ip<or=600 kA.

日本語訳

TCVトカマクの最初の1年間の運転において、多様なプラズマ形状と磁気配位が生成され、1.0<or=Btor<or=1.46 T、Ip<or=800 kA、κ<or=2.05、-0.7<or=δ<or=0.7の範囲で実現された。プラズマ電流の有限要素再構成に基づく新しい形状制御アルゴリズムが実装された。安定性マージンf=1.15に対応する鉛直成長率800 sec-1が安定化された。オーミックHモードでは、エネルギー閉じ込め時間が80 msに達し、規格化ベータ(βtoraB/Ip)が1.9、τE/ITER89-Pが2.4となり、イオンのgrad BドリフトがX点方向を向いたシングルヌルX点重水素放電において達成された。リミターHモードでは、360 kA<or=Ip<or=600 kAのD字型プラズマにおいて、最大線平均電子密度1.7*1020m-3が観測された。

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