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New high rotation mode in magnetized rotating plasmas

C Teodorescu, R F Ellis, A Case, R Clary, A B Hassam, R Lunsford, S Messer2006年Plasma Physics and Controlled FusionIF 2.2出版社

A new high-rotation (HR) mode of operation is reported for magnetized rotating plasmas. Plasma is produced by an externally applied radial electric field in the Maryland centrifugal experiment, a mirror magnetic field plasma rotating azimuthally. The HR mode is achieved by optimizing over the discharge current. Previously reported stationary or steadily declining plasma voltages are now replaced by time-increasing voltages in the HR mode, with maximum voltages significantly higher than those previously recorded. Sonic Mach numbers are close to the theoretical values required for centrifugal confinement and for suppressing large scale magnetohydrodynamic (MHD) instabilities. Plasma momentum confinement time is much longer than the MHD instability time scale and longer than in ordinary mode operation. The mode is sustained over several confinement times.

日本語訳

磁化回転プラズマにおいて、高回転(HR)モードの動作が報告されている。プラズマは、メリーランド遠心実験装置において、外部から印加された径方向電場によって生成され、鏡磁場中で方位角方向に回転する。HRモードは、放電電流の最適化によって達成される。従来報告されていた定常的または単調減少するプラズマ電圧は、HRモードでは時間とともに増加する電圧に置き換わり、その最大電圧は従前に記録された値よりも有意に高くなる。マッハ数は、遠心閉じ込めおよび大規模磁気流体力学(MHD)不安定性の抑制に必要な理論値に近い値を示す。プラズマ運動量閉じ込め時間は、MHD不安定性の時間スケールよりもはるかに長く、通常モード動作時よりも長い。このモードは、複数の閉じ込め時間にわたって維持される。

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