Measurement of the 2D emission profiles of hydrogen and impurity ions in the TCV divertor

EUROfusion MST1 Team, TCV team, A. Perek (Corresponding author), T. A. Wijkamp, M. R. de Baar

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

Plasma emission of hydrogen and impurities is measured with use of filtered camera imaging in TCV divertor. The measurement technique is discussed in detail including: selection choice of filters, the absolute calibration procedure and the tomographic inversion. The process is applied to an unseeded L-mode density ramp discharge in an unfavorable for H-mode access magnetic field direction with divertor baffles. Obtained poloidal emission profiles are used to split Balmer emission into excitation and recombination parts revealing a recombination emission maximum on the high field side. The optical emission is further studied by selecting radial profiles in cross sections of interest finding an opposite radial shift direction for high and low n Balmer line emission maxima in detached conditions.

Original languageEnglish
Article number100858
Number of pages7
JournalNuclear Materials and Energy
Volume26
DOIs
Publication statusPublished - Mar 2021

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was supported in part by the Swiss National Science Foundation.

FundersFunder number
Horizon 2020 Framework Programme633053
H2020 Euratom
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

    Keywords

    • 2D spectroscopy
    • Detachment
    • Quantitative imaging
    • Tomographic inversion

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