2006/12/01 by H. SUGAMA, H. Sugama, T. Watanabe +1
Physics and Astronomy · Earth and Planetary Sciences · #Magnetic confinement fusion research #Ionosphere and magnetosphere dynamics #Tropical and Extratropical Cyclones Research
paper · doi:10.1017/s0022377806004958
Collisionless time evolutions of geodesic acoustic modes (GAMs) in tokamaks are investigated by the gyrokinetic theory and simulation. It is shown that the collisionless damping of the GAM oscillations is enhanced when the ratio of the typical drift orbit width of passing ions to the radial wavelength of the zonal flow increases.