Characterization of wall conditions in DIII-D Metadata

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Title

  • Main Title Characterization of wall conditions in DIII-D

Creator

  • Author: Holtrop, K. L.
    Creator Type: Personal
  • Author: Jackson, G. L.
    Creator Type: Personal
  • Author: Kellman, A. G.
    Creator Type: Personal
  • Author: Lee, R. L.
    Creator Type: Personal
  • Author: West, W. P.
    Creator Type: Personal
    Creator Info: General Atomics, San Diego, CA (United States)
  • Author: Wood, R. D.
    Creator Type: Personal
    Creator Info: Lawrence Livermore National Lab., CA (United States)
  • Author: Whyte, D. G.
    Creator Type: Personal
    Creator Info: Inst. National de la Recherche Scientifique, Rimouski, Quebec (Canada). Energie et Materiaux

Contributor

  • Sponsor: United States. Department of Energy. Office of Energy Research.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Energy Research, Washington, DC (United States)

Publisher

  • Name: General Atomic Company
    Place of Publication: San Diego, California
    Additional Info: General Atomics, San Diego, CA (United States)
  • Name: Lawrence Livermore National Laboratory
    Place of Publication: California
    Additional Info: Lawrence Livermore National Lab., CA (United States)

Date

  • Creation: 1996-10-01

Language

  • English

Description

  • Content Description: Wall conditioning in DIII-D is one of the most important factors in achieving reproducible high confinement discharges. For example, the very high confinement mode (VH-mode) was only discovered after boronization, a CVD technique to deposit a thin boron film over the entire surface of the tokamak. In order to evaluate wall conditions and provide a data base to correlate these wall conditions with tokamak discharge performance, a series of nominally identical reference VH-mode discharges (1.6 MA, 2.1 T, double-null diverted) were taken at various times during a series of experimental campaigns with evolving wall conditions. These reference discharges have allowed a quantitative determination of how the wall conditions have evolved. For instance, core carbon and oxygen levels in the VH-mode phase remains at historically low levels during the 1995 run year and there was also a steady decrease in the oxygen levels at plasma initiation during this period. The authors discuss the long term changes in low Z impurities and the effect of wall conditioning techniques such as boronization and baking on these impurities. In addition, the evolution of the deuterium recycling rates will be discussed.
  • Physical Description: 25 p.

Subject

  • Keyword: Baking
  • Keyword: H-Mode Plasma Confinement
  • STI Subject Categories: 70 Plasma Physics And Fusion
  • Keyword: Doublet-3 Device
  • Keyword: First Wall
  • Keyword: Chemical Vapor Deposition
  • Keyword: Plasma Impurities
  • Keyword: Boron

Source

  • Conference: 43. national symposium of the American Vacuum Society (AVS), Philadelphia, PA (United States), 14-18 Oct 1996

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE97004589
  • Report No.: GA--A22474
  • Report No.: CONF-961002--7
  • Grant Number: AC03-89ER51114;W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 468570
  • Archival Resource Key: ark:/67531/metadc676816

Note

  • Display Note: INIS; OSTI as DE97004589
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