Reconstruction of Electron Temperature Profiles Using Bayesian Analysis on Electron Cyclotron Emission Diagnostics in CHD

Abstract

The electron cyclotron emission (ECE) diagnostics is planned to be installed in the CHD stellarator/heliotrons for electron temperature measurement. The radiation profile of ECE is simulated by raytracing code, TRAVIS. Due to the insufficient optical thickness, the radiation temperature can be deviate from the electron temperature. To recon­struct the electron temperature profile, we have developed the analysis method based on the Bayesian framework, ODAT-SE. The method examined for several scenarios, including the wall reflections and energetic electrons. We have accurately reconstructed the electron temperature profile in all scenarios if the electron density profile is priorly given.