Ballooning Delta-prime in the Second Stable Region

Physics of Fluids |

The stability of resistive ballooning modes in the second ideal stability region is an important issue that has recently received much attention. In this paper it is shown that the ballooning triangle 1s negative, and therefore that the triangle -driven modes are stable, throughout most of the second region. These results are compared with those of Kim and Choi [Phys. Fluids Bl, 1444 (1989)].