Forward modeling of collective Thomson scattering for Wendelstein 7-X plasmas: Electrostatic approximation

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • W7-X Team

Research units

  • Eindhoven University of Technology
  • Max-Planck-Institut für Plasmaphysik
  • Danmarks Tekniske Universitet
  • University of Stuttgart

Abstract

In this paper, we present a method for numerical computation of collective Thomson scattering (CTS). We developed a forward model, eCTS, in the electrostatic approximation and benchmarked it against a full electromagnetic model. Differences between the electrostatic and the electromagnetic models are discussed. The sensitivity of the results to the ion temperature and the plasma composition is demonstrated. We integrated the model into the Bayesian data analysis framework Minerva and used it for the analysis of noisy synthetic data sets produced by a full electromagnetic model. It is shown that eCTS can be used for the inference of the bulk ion temperature. The model has been used to infer the bulk ion temperature from the first CTS measurements on Wendelstein 7-X.

Details

Original languageEnglish
Article number023501
JournalReview of Scientific Instruments
Volume90
Issue number2
Publication statusPublished - 1 Feb 2019
MoE publication typeA1 Journal article-refereed

ID: 32632727