Commissioning and first results of the 174 GHz collective Thomson scattering diagnostic at Wendelstein 7-X

D. Moseev*, S. Ponomarenko, H.P. Laqua, T. Stange, S.K. Nielsen, H. Braune, G. Gantenbein, S. Illy, J. Jelonnek, W. Kasparek, A. Kuleshov, L. Krier, C. Lechte, S. Marsen, M. Nishiura, B. Plaum, R. Ragona, T. Ruess, M. Salewski, P. StordiauM. Thumm, R.C. Wolf, J. Zimmermann

*Corresponding author for this work

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Abstract

Collective Thomson Scattering (CTS) diagnostics measure the scattering spectrum of monochromatic incident radiation off collective fluctuations in the plasma. In this contribution, we present the first results from the upgraded CTS diagnostic at Wendelstein 7-X (W7-X) operating in the frequency range between 172 and 176 GHz. This frequency range allows for minimization of noise originating from the electron cyclotron emission in the plasma. Consequently, the good signal-to-noise ratio allows measurements of fast ions or bulk plasma parameters with higher temporal resolution compared with the previously used 140 GHz system.
Original languageEnglish
Article numberC03056
JournalJournal of Instrumentation
Volume19
Issue number03
Number of pages9
ISSN1748-0221
DOIs
Publication statusPublished - 2024
Event20th International Symposium on Laser-Aided Plasma Diagnostics - Kyoto, Japan
Duration: 10 Sept 202314 Sept 2023
Conference number: 20

Conference

Conference20th International Symposium on Laser-Aided Plasma Diagnostics
Number20
Country/TerritoryJapan
CityKyoto
Period10/09/202314/09/2023

Keywords

  • Microwave radiometers
  • Microwave Antennas

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