EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • UC-San-Diego
  • Lawrence Livermore National Laboratory
  • General Atomics
  • Forschungszentrum Jülich
  • JET
  • Oak Ridge National Laboratory
  • Sandia National Laboratories


The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.


Original languageEnglish
Pages (from-to)211-217
Number of pages7
JournalNuclear Materials and Energy
Publication statusPublished - 1 May 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Deuterium atomic and molecular emission, DIII-D, Divertor edge fluid simulations, EDGE2D-EIRENE, EIRENE, Lyman-Werner and Fulcher band

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