Radiation distributions in detached divertor operation on DIII-D

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Enhanced radiative losses with accompanying divertor heat flux reductions have been achieved on DIII-D by the puffing of deuterium and/or neon gas. In addition these highly radiating, reduced divertor heat flux regimes have been extended to lower core plasma density through cryopumping in the divertor. This paper describes the magnitude, distribution and other characteristics of the radiation obtained during these experiments. Radiated power is measured by two poloidally separated 24-channel bolometer arrays. One array views from above, the other from below the midplane. The radiated power profile is reconstructed by assuming constant emissivity on a flux surface for the core ... continued below

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4 p.

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Leonard, A.W.; Petrie, T.W. & Allen, S.L. July 1, 1995.

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Description

Enhanced radiative losses with accompanying divertor heat flux reductions have been achieved on DIII-D by the puffing of deuterium and/or neon gas. In addition these highly radiating, reduced divertor heat flux regimes have been extended to lower core plasma density through cryopumping in the divertor. This paper describes the magnitude, distribution and other characteristics of the radiation obtained during these experiments. Radiated power is measured by two poloidally separated 24-channel bolometer arrays. One array views from above, the other from below the midplane. The radiated power profile is reconstructed by assuming constant emissivity on a flux surface for the core and SOL plasma and paramterizating the divertor radiation by flux surface and distance above the divertor floor. Images of visible line radiation in the divertor provide information about the distribution of impurities; e.g., a tangential image is inverted to provide a poloidal profile of the emissivity. The core plasma impurity densities are measured by charge-exchange spectroscopy techniques.

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4 p.

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INIS; OSTI as DE96002695

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  • 22. European conference on controlled fusion and plasmas physics, Bournemouth (United Kingdom), 3-7 Jun 1995

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  • Other: DE96002695
  • Report No.: GA-A--22068
  • Report No.: CONF-9506282--3
  • Grant Number: AC03-89ER51114;W-7405-ENG-48;AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 135520
  • Archival Resource Key: ark:/67531/metadc618655

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Aug. 1, 2016, 6:38 p.m.

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Leonard, A.W.; Petrie, T.W. & Allen, S.L. Radiation distributions in detached divertor operation on DIII-D, article, July 1, 1995; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc618655/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.