Collisionless damping of geodesic acoustic mode (GAM) excited in the large safety factor (q) region of a tokamak plasma is investigated taking into account the effects of finite ion Larmor radius and guiding-center drift orbit width as well as parallel electric field contributions. A corresponding analytical expression for the damping rate including higher-order harmonics of ion transit resonances is systematically derived and agrees well with numerical results in its validity regime. © 2009 IOP Publishing Ltd.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Nuclear Energy and Engineering
Qiu, Z., Chen, L., & Zonca, F. (2009). Collisionless damping of short wavelength geodesic acoustic modes. Plasma Physics and Controlled Fusion, 51(1), -. . https://doi.org/10.1088/0741-3335/51/1/012001