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Advances in singly connected closed field line plasma devices and extrapolation to POP level experiments and reactors

A.L. Hoffman, L.C. Steinhauer, H. Ferrari, R. Farengo2009年被引用 2Nuclear FusionIF 3出版社

Recent advances in creating stable, hot, steady-state field-reversed-configuration (FRC) plasmas using rotating magnetic fields (RMFs) have made this an appropriate time for re-examining the old field-reversed-mirror concept. The reactor advantages of such a linear, naturally high beta configuration would be enormous, but previous attempts to produce field reversal using tangential neutral beam injection (TNBI) alone were unsuccessful. Simple scalable extensions of present RMF produced FRCs can result in ideal traps for TNBI produced energetic ions, and detailed calculations show high efficiencies of TNBI production of energetic ion rings within such FRCs. If non-standard MHD effects such as strong flow and highly energetic ions are able to extend FRC stability to larger sizes, then the principal need will be to reduce present high values of anomalous cross-field resistivity. Experimental trends show how this may be achieved, and the present experimental and theoretical status of the most basic issues of FRC stability, confinement, and current drive are summarized, along with the new calculations on TNBI. The parameters for a modest sized 'proof-of-principle' (POP) device which can address these basic issues, as well as provide enough flux for efficient TNBI trapping, are given.

日本語訳

最近の回転磁場(RMF)を用いた安定した高温定常場反転配位(FRC)プラズマの生成における進展により、従来の場反転ミラー概念を再検討する適切な時期となった。このような線状の自然高ベータ配位の炉心としての利点は計り知れないが、従来の接線方向中性粒子ビーム入射(TNBI)のみによる場反転の生成試みは成功しなかった。現在のRMF生成FRCの単純なスケーラブルな拡張は、TNBI生成高エネルギーイオンに対する理想的なトラップとなり得る。詳細な計算により、そのようなFRC内でのTNBIによる高エネルギーイオンリング生成の高効率が示されている。非標準的なMHD効果、例えば強い流れや高エネルギーイオンがFRCの安定性をより大きなサイズに拡張できるならば、主要な課題は現在の異常交叉磁場抵抗率の高い値を低減することになる。実験的傾向はこれが達成可能であることを示しており、FRCの安定性、閉じ込め、および電流駆動の最も基本的な問題に関する現在の実験的・理論的状況が、TNBIに関する新たな計算とともに要約されている。これらの基本的な問題に対処でき、かつ効率的なTNBI捕捉に十分な磁束を提供できる中規模の「原理実証」(POP)装置のパラメータが提示されている。

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