Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
Ideal ballooning modes are believed to be responsible for high beta disruption observed on TFTR and DII-D. Recent 3D MHD simulations of the disruption phenomenon further support this point of view. Thus it is important to understand the role of non-ideal effects, like finite electron inertia as well as electron pressure gradients and ion-diamagnetic effects on the stability of these modes and establish more realistic threshold conditions. We have modified our one-dimensional eigenvalue code based on the ballooning mode formalism, to include these non-ideal effects and will systematically investigate the changes in the beta threshold for ballooning modes. We will present results of the modification of the stability boundary in the standard s-\alpha diagram due to each of the non-ideal effects that we incorporate in our studies.