First absolute measurements of fast-ion losses have been obtained in the ASDEX Upgrade tokamak by means of absolutely calibrated scintillator based fast ion loss detector and infrared measurements. An instrument function that includes scintillator efficiency, collimator geometry, optical transmission and camera efficiency has been constructed. Absolute flux of Neutral Beam Injection (NBI) prompt losses has been obtained in magnetohydrodynamic (MHD) quiescent plasmas. ASCOT simulations are in fairly good agreement with FILD and IR measurements of the fast ion load.

This research was supported in part by the Spanish Ministry of Economy and Competitiveness (RYC2011-09152, FIS2015-69362-P and ENE2012-31087), the Marie Curie FP7 Integration Grant, PCIG11-GA-2012-321455, within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement number 633053 and the V Plan propio de la Universidad de Sevilla (VPPI-US).

Trabajo presentado a la 21st Topical Conference on High Temperature Plasma Diagnostics, celebrada en Madison, Wisconsin (US) del 5 al 9 de junio de 2016.

ASDEX Upgrade Team: et al.

Peer Reviewed