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Axial compression of a field reversed configuration plasma

S. Okada, K. Kitano, H. Matsumoto, K. Yamanaka, T. Ohtsuka, A.K. Martin, M. Okubo, S. Yoshimura, S. Sugimoto, S. Ohi1999年被引用 11Nuclear FusionIF 3出版社

A new concept for plasma heating using axial magnetic compression of a field reversedconfiguration (FRC) plasma is proposed. In this concept, the FRC plasma is compressed only axially,keeping the magnetic flux between the separatrix and the confining chamber (flux conserver) wallunchanged, while allowing the plasma to expand radially. A simple model based on an empiricalscaling law of FRC confinement and on the assumption that the compression is done adiabatically predicts that, in addition to heating the plasma, improved confinement will also be accomplished with this concept. This compression is done by energizing segmented mirror coils successively in such a way as to decrease the length of the confinement region between the coils. The apparatus for this axial compression was developed and an experiment was carried out. In this experiment the plasma was compressed by about 30% and the plasma lifetime of about 500 μs was increased by about 50 μs.

日本語訳

磁場反転配位(FRC)プラズマの軸方向磁気圧縮を用いたプラズマ加熱の新しい概念を提案する。この概念では、FRCプラズマは軸方向のみに圧縮され、セパラトリックスと閉じ込め容器(フラックスコンサーバー)壁の間の磁束は不変のまま、プラズマは径方向に膨張することが許容される。FRC閉じ込めの経験則と、圧縮が断熱的に行われるという仮定に基づく単純なモデルは、この概念によりプラズマの加熱に加えて、閉じ込めの改善も達成されることを予測する。この圧縮は、分割されたミラーコイルを順次励磁し、コイル間の閉じ込め領域の長さを減少させることによって行われる。この軸方向圧縮のための装置を開発し、実験を実施した。この実験では、プラズマは約30%圧縮され、約500μsのプラズマ寿命は約50μs延長された。

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Field-Reversed Configuration
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