Previous three dimensional magnetohydrodynamic studies of the Large Helical Device are extended to include free-boundary calculations of two realistic equilibrium sequences. The use of an external vertical field to centre the configuration as the plasma pressure increases is shown to give results that are almost identical with the earlier fixed-boundary computations. The expected response of a set of magnetic diagnostic loops is calculated and the sensitivity of the Mercier stability to the treatment of resonances in the parallel current is also considered
従来の三次元電磁流体力学的研究を拡張し、大型ヘリカル装置の現実的な平衡系列2つに対する自由境界計算を含めた。プラズマ圧力が増加するにつれて配位を中心に保つために外部垂直磁場を用いることが、以前の固定境界計算とほぼ同一の結果を与えることを示す。一組の磁気診断ループの期待応答を計算し、平行電流における共鳴の扱いに対するMercier安定性の感度も考察する。