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An experimental and computational study of compact torus formation, decay and heating in the Berkeley Compact Torus Experiment

E. Coomer, C.W. Hartman, E. Morse, D. Reisman2000年被引用 4Nuclear FusionIF 3出版社

A spheromak type compact torus (CT) plasma is investigated by studies of thegun type plasma formation mechanism and from the characteristics of the magnetic decay following the establishment of a CT equilibrium in the flux conserver. Radiofrequency heating in the lower hybrid range (432 MHz) is used to study the electron heat confinement using a 20 MW, 100 μs power pulse. While electron temperatures up to 200 eV have been measured with RF heating, the impact on magnetic decay from the RF heating is relatively weak. A simple model based upon parallel electron heat transport along stochastic magnetic field lines gives a scaling law for magnetic decay which fits the experimental data. Results of two dimensional MHD code calculations are given which match many details of the experimentally observed formation physics.

日本語訳

スフェロマック型コンパクトトーラス(CT)プラズマは、ガン型プラズマ生成機構の研究と、フラックスコンサーバー内でのCT平衡確立後の磁場減衰特性の観測を通じて調査される。低ハイブリッド周波数帯(432 MHz)における高周波加熱は、20 MW、100 μsのパワーパルスを用いて電子熱閉じ込めの研究に使用される。高周波加熱により最大200 eVの電子温度が測定されているが、磁場減衰に対する高周波加熱の影響は比較的弱い。確率的磁力線に沿った平行電子熱輸送に基づく単純なモデルは、実験データに適合する磁場減衰のスケーリング則を与える。観測された生成物理の多くの詳細と一致する2次元MHDコード計算の結果が示される。

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