R Reimer, O Marchuk, B Geiger, P J Mc Carthy, M Dunne, J Hobirk, R Wolf, ASDEX Upgrade Team

2017

August

Review of Scientific Instruments

Influence of non-local thermodynamic equilibrium and Zeeman effects on magnetic equilibrium reconstruction using spectral motional Stark effect diagnostic

Published

WOS: 4 ()

Stark effect Thermodynamics Zeeman effect

88

8

083509

The Motional Stark Effect (MSE) diagnostic is a well established technique to infer the local internal magnetic field in fusion plasmas. In this paper, the existing forward model which describes the MSE data is extended by the Zeeman effect, fine-structure, and relativistic corrections in the interpretation of the MSE spectra for different experimental conditions at the tokamak ASDEX Upgrade. The contribution of the non-Local Thermodynamic Equilibrium (non-LTE) populations among the mag- netic sub-levels and the Zeeman effect on the derived plasma parameters is different. The obtained pitch angle is changed by 3

10.1063/1.4994889