A new beam emission polarimetry diagnostic for measuring the magnetic field line angle at the plasma edge of ASDEX Upgrade

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.A new edge beam emission polarimetry diagnostic dedicated to the measurement of the magnetic field line angle has been installed on the ASDEX Upgrade tokamak. The new diagnostic relies on the Motional Stark Effect and is based on the simultaneous measurement of the polarization direction of the linearly polarized π (parallel to the electric field) and σ (perpendicular to the electric field) lines of the Balmer line Dα. The technical properties of the system are described. The calibration procedures are discussed and first measurements are presented.This work has been carried out 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. The support from the EUROfusion Researcher Fellowship programme under grant number WP14-FRF-IPP/Viezzer and from the Spanish Ministry of Economy and Competitiveness (FJCI-201422139) is gratefully acknowledged.Peer Reviewe