Heat Load onto the Globus-M2 Tokamak Wall due to Fast Ion Loss during Development of Toroidal Alfvén Eigenmodes

Abstract

The results of experiments are described, which were performed at the Globus-M2 tokamak andaimed at studying the fast ion loss at the outer tokamak wall due to fast ions interaction with the toroidalAlfvén eigenmodes. The local heating of carbon tiles was experimentally measured, and the correspondingheat flux was calculated. It was shown how simulations of the lost particle orbits can explain the characteristicfeatures of the spatial map of wall heating. The flux of lost fast particles onto the wall was studied as a functionof the instability amplitude. It has been demonstrated that the simulations predict similar dependence of thefast ion flux on the instability amplitude and also correlate its nature to the peculiarities of fast ions spatialdistribution.