Collective Thomson scattering data analysis for Wendelstein 7-X

I. Abramovic, A. Pavone, J. Svensson, D. Moseev, M. Salewski, H. P. Laqua, N.J. Lopes Cardozo, R.C. Wolf

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Abstract

Collective Thomson scattering (CTS) diagnostic is being installed on the Wendelstein 7-X stellarator to measure the bulk ion temperature in the upcoming experimental campaign. In order to prepare for the data analysis, a forward model of the diagnostic (eCTS) has been developed and integrated into the Bayesian data analysis framework Minerva. Synthetic spectra have been calculated with the forward model and inverted using Minerva in order to demonstrate the feasibility to measure the ion temperature in the presence of nuisance parameters that also influence CTS spectra. In this paper we report on the results of this anlysis and discuss the main sources of uncertainty in the CTS data analysis.

Original languageEnglish
Article numberC08015
Number of pages7
JournalJournal of Instrumentation
Volume12
Issue number8
DOIs
Publication statusPublished - 16 Aug 2017
Event2nd European Conference on Plasma Diagnostics (ECPD 2017) - Bordeaux, France
Duration: 18 Apr 201721 Apr 2017
Conference number: 2
http://iopscience.iop.org/journal/1748-0221/page/extraproc65

Keywords

  • Analysis and statistical methods
  • Nuclear instruments and methods for hot plasma diagnostics
  • Simulation methods and programs

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