Ion kinetic effect on the low-n toroidal modes in compact torus (CT) plasmas such as spherical tokamak (ST), spheromak, field reversed configuration (FRC), and compact reversed field pinch (RFP) was investigated by using different ion species. The experimental results indicate that ion kinetic stabilization of the low-n modes was obtained in the low-q95 regime. It was clearly shown that the n = 1 mode was stabilized in the FRC under the low-S* regime (S*: averaged number of ion skin depth). The suppression of the n=2 mode activity in the low-S* RFP plasma was also observed. In the high-q95 (∼4) ST regime, all low-n (1 to 4) toroidal modes were stable for both high S* and low S*.
|Number of pages||6|
|Journal||Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)|
|Publication status||Published - 2006 Dec 1|
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering