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

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

Keywords

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

Fingerprint Dive into the research topics of 'Measurement of the 2D emission profiles of hydrogen and impurity ions in the TCV divertor'. Together they form a unique fingerprint.

Cite this