Global and Self-consistent Simulation of ICRF Heating in Toroidal Plasmas

Abstract

The ICRF heating in toroidal plasmas is studied using two global simulation codes: a full wave field solver TASK/WM and a drift kinetic equation solver GNET. The codes are applied to both tokamaks and helical systems. The full wave code TASK/WM evaluates the realistic wave electric field, in which the effect of the self-consistent non-Maxwellian velocity distribution on the wave propagation is taken into account. GNET solves a linearized drift kinetic equation (5D phase-space) for energetic ions including complicated behavior of trapped particles in helical systemsCharacteristics of energetic ion distributions in the phase space are investigatedSelf-consistent analysis including the effect of energetic ion distribution on the fast wave propagation is also reported for tokamak plasmas.

Magnetic confinement theory summary

“…Full-wave treatments for IC and LH waves with self-consistent energetic particle distributions are now feasible. Thus three-dimension modelling for the helical device LHD, accounting for the complex phase-space of the fast-particle distributions, is possible, as demonstrated by Murakami [128]. These calculations, which form part of the TASK integrated modelling initiative, show satisfactory agreement with the fast-particle energy spectrum detected by the NDD NPA diagnostic.…”

Simulation of fast Alfvén wave interaction with beam ions over a range of cyclotron harmonics in DIII-D tokamak

“…It self-consistently calculates wave fields from the global full wave code, LION, [12] and non-Maxwellian velocity distribution of fast ions from a Monte-Carlo code, FIDO, [13] solving orbit-averaged Langevin equations for invariants of motion of unperturbed orbits for each resonant ion species in circular magnetic surfaces. More recently, Murakamini developed a global and selfconsistent simulation package using the full wave field solver, TASK/WM, and a linearized drift kinetic equation solver; GNET [14].…”