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A localized high multipolar conductor configuration for a magnetic limiter in TEXTOR

A Nicolai, F Schongen, D Reiter1985年Plasma Physics and Controlled FusionIF 2.2出版社

The radially disturbing magnetic field generated by an octopole configuration is Fourier analysed and its impact on the transport processes of the plasma in the boundary region of TEXTOR (a=50 cm) is assessed. The Fourier analysis showed that beyond the radius r=42 cm a magnetically mixed layer is established, where the overlapping of the islands corresponding to each resonant Fourier component is good. As the main figure of merit concerning the transport process, the mean inclination angle epsilon (r) of the field lines against the toroidal direction, is computed. For the coil current Jc=60 kA the maximum value of epsilon (r) is 2.10-3. For TEXTOR, with and without additional heating, the modelling of the boundary region shows that the magnetic limiter action reduces the edge temperatures by a factor 6, and 1.7, respectively, mainly because of the enhanced heat diffusivities. The recycled hydrogen flux is increased roughly by a factor 3, thereby enhancing the electron density at the limiter edge by around a factor 1.6.

日本語訳

八極配位によって生成される摂動磁場をフーリエ解析し、TEXTOR(a=50 cm)の境界領域におけるプラズマの輸送過程への影響を評価した。フーリエ解析の結果、半径r=42 cmを超えると磁気混合層が形成され、各共鳴フーリエ成分に対応する磁気島の重なりが良好であることが示された。輸送過程に関する主要な性能指標として、トロイダル方向に対する磁力線の平均傾斜角ε(r)を計算した。コイル電流Jc=60 kAの場合、ε(r)の最大値は2×10⁻³である。TEXTORにおいて、追加加熱の有無にかかわらず、境界領域のモデリングにより、磁気リミッター作用が端部温度をそれぞれ6倍および1.7倍低減することが示された。これは主に熱拡散率の増大によるものである。リサイクル水素フラックスは約3倍増加し、これによりリミッター端部での電子密度が約1.6倍増大する。

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textor高精度(タイトル一致)

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LimiterTEXTOR
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