3.1 閉じ込めはどこまで達成したか?(3.高閉じ込めは高ベータと両立するか?, <小特集>球状トカマクの実用炉への展望-トカマクの低アスペクト比化への挑戦-)

概要

論文の詳細を見る
Auxiliary heated confinement data are being accumulated from medium-size spherical tokamaks MAST and NSTX with aspect ratio A=R/a≅1.5. It has already been demonstrated that high beta (normalized beta β_N>5) and good confinement (enhancement over tokamak H-mode confinement scaling H_<H98y2>1) can be achieved simultaneously. Both L-mode and H-mode plasmas have energy confinement times comparable to or exceeding predictions of scaling laws based on conventional aspect ratio tokamak data. Analyses of kinetic profile data indicate that ion transport is near neoclassical in most cases, but electron transport is highly anomalous and is the dominant power loss channel. Indications of internal transport barrier formation are observed in both ion and electron temperature profiles, contributing to the core pressure increase.
社団法人プラズマ・核融合学会の論文
2004-11-25