High time-resolved, 2D imaging of type-I ELMs in DIII-D using a image-intensified CID camera

M. Groth*, M. E. Fenstermacher, J. A. Boedo, N. H. Brooks, D. S. Gray, C. J. Lasnier, A. W. Leonard, G. D. Porter, J. G. Watkins

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

The evolution of 2D emission profiles of D-alpha and C III during type-I edge localised modes (ELMs) has been investigated in DIII-D using a tangentially viewing gated, intensified charge-injected device (CID) camera. The measured CIII emission profiles indicate transient inner leg attachment with the arrival of the ELM heat pulse. The measured D-alpha emission profiles during an ELM cycle show enhanced deuterium recycling during the deposition of the ELM particle pulse at the target, which suggests the detachment of the divertor plasma from the target plates. Measurements taken in ELMy H-mode discharges at densities of 50% and 90% of the Greenwald density limit are compared utilising the CID camera system and a comprehensive set of other divertor diagnostics. An ELM models based on fluid and PIC simulations are used to discuss the observation on the response of the divertor plasma to the ELM heat and particle pulse.

Original languageEnglish
Pages (from-to)1071-1075
Number of pages5
JournalJournal of Nuclear Materials
Volume313-316
DOIs
Publication statusPublished - Mar 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • Divertor
  • ELM evolution
  • Line emission profiles
  • Plasma imaging

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