Investigation of suprathermal electron dynamics with ECCD in the TCV tokamak

摘要

Introduction Suprathermal electron dynamics in both real and velocity spaces play an important role in the physics of electron cyclotron current drive (ECCD), which is crucial for auxiliary current drive and MHD stability and plasma profile control. On the TCV tokamak, a gyrotron power modulation technique is being employed to investigate the dependence of suprathermal electron transport on electron energy and location as well as EC power, utilizing a novel hard X-ray tomographic spectrometer (HXRS). The modulated EC discharge is modelled using the collisional/quasilinear 3D (2D in momentum space and ID in spatial space) bounce-averaged Fokker-Planck solver LUKE.