Access to the Second Stability Regime near the Plasma Surface in a High-q,Low-Shear Tokamak Plasma

概要

論文の詳細を見る
Access to the second stability regime of the ballooning mocles is realized near theplasma surface in a nearly circular tokamak. It is shown that the plasma with a highsafety factor and low shear near the plasma surface can access to the second regimewithout the effect of X-point, even if the safety factc>r at the magnetic axis is low (< 1).The scaling of the second stability boundary as a function ol' the safety factor, theshear, aspect ratio, elongation and triangularity has been numerically calculated by us-ing the pressure profile optimization technique. Results show 1.hat the accessibility tothe second stability regime is high in a low aspect ratio and 21 positive triangularity((>>0) regime. By the effect of a pedestal current profile, the global shear near theplasma surface is reduced, and the accessibility is improved.[second stability, ballooning mode, plasma surface, low shear, high safety fac- ll tor, tokamakl
社団法人日本物理学会の論文
1990-03-15