Energetic bounds on gyrokinetic instabilities. Part 1. Fundamentals

P. Helander, G.G. Plunk
2022 Journal of Plasma Physics  
Upper bounds on the growth of free energy in gyrokinetics are derived. These bounds apply to all local gyrokinetic instabilities in the geometry of a flux tube, i.e. a slender volume of plasma aligned with the magnetic field, regardless of the geometry of field, the number of particle species or collisions. The results apply both to linear instabilities and to the nonlinear growth of finite-amplitude fluctuations.
doi:10.1017/s0022377822000277 fatcat:fqzzbcoupjh27ghrllxzmgtafy