Collective Thomson scattering diagnostic at Wendelstein 7-X

D. Moseev*, M. Stejner, T. Stange, I. Abramovic, H. P. Laqua, S. Marsen, N. Schneider, H. Braune, U. Hoefel, W. Kasparek, Søren Bang Korsholm, C. Lechte, Frank Leipold, S. K. Nielsen, Mirko Salewski, J. Rasmussen, M. Weißgerber, R. C. Wolf

*Corresponding author for this work

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Abstract

A Collective Thomson Scattering (CTS) diagnostic is installed at Wendelstein 7-X for ion temperature measurements in the plasma core. The diagnostic utilizes 140 GHz gyrotrons usually used for electron cyclotron resonance heating (ECRH) as a source of probing radiation. The CTS diagnostic uses a quasi-optical transmission line covering a distance of over 40 m. The transmission line is shared between the ECRH system and the CTS diagnostic. Here we elaborate on the design, installation, and alignment of the CTS diagnostic and present the first measurements at Wendelstein 7-X.
Original languageEnglish
Article number013503
JournalReview of Scientific Instruments
Volume90
Issue number1
Number of pages12
ISSN0034-6748
DOIs
Publication statusPublished - 2019

Cite this

Moseev, D., Stejner, M., Stange, T., Abramovic, I., Laqua, H. P., Marsen, S., Schneider, N., Braune, H., Hoefel, U., Kasparek, W., Korsholm, S. B., Lechte, C., Leipold, F., Nielsen, S. K., Salewski, M., Rasmussen, J., Weißgerber, M., & Wolf, R. C. (2019). Collective Thomson scattering diagnostic at Wendelstein 7-X. Review of Scientific Instruments, 90(1), [013503]. https://doi.org/10.1063/1.5050193