中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1399-1404.doi: 10.1088/1009-1963/16/5/038
石秉仁, 林建龙, 李继全
Shi Bing-Ren(石秉仁)†, Lin Jian-Long(林建龙), and Li Ji-Quan(李继全)
摘要: Improved confinement of tokamak plasma with central negative shear is checked against the resistive ballooning mode. In the negative shear regime, the plasma is always unstable for purely growing resistive ballooning mode. For a simplest tokamak equilibrium model, the s--α model, characteristics of this kind of instability are fully clarified by numerically solving the high n resistive magnetohydrodynamic ballooning eigen-equation. Dependences of the growth rate on the resistivity, the absolute shear value, the pressure gradient are scanned in detail. It is found that the growth rate is a monotonically increasing function of α while it is not sensitive to the changes of the shear s, the initial phase \ta0 and the resistivity parameter \vaR.
中图分类号: (Tokamaks, spherical tokamaks)