2011/09/01 by A. B. Hassam, Hassam, A. B., Robert G. Kleva +2
Physics and Astronomy · #FOS: Physical sciences #Magnetic confinement fusion research #Plasma Physics (physics.plasm-ph) #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.1109.0057
arxiv created 2011/09/01 · openalex publication_date 2011/09/01 · arxiv updated 2011/09/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Collisionless geodesic acoustic modes in tokamaks being supersonic for large "safety factor" q, the CGL (G. Chew, M. Goldberger, F. Low, 1956)1 double-adiabatic fluid closure is applied to formulate a theory for these modes. The basic linear normal mode is obtained. External means to drive these modes at resonance, as has been proposed earlier, are explored. The external drivers considered include external magnetic forces to effect flux surface displacements, as well as non-axisymmetric ion heating. Finally, the damping of these modes from collisional magnetic pumping is investigated using a model set of CGL collision-corrected equations.