DIII-D data for modeling the scrape-off-layer plasma

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We are in the process of assembling a database of edge and divertor plasma parameters suitable for use in benchmarking tious 2D models of the scrape-off- layer (SOL) plasma. Also, we are using the Braams B2 code to derive transport coefficients for the edge plssma. In parallel, work is starting on an upgrade to the B2 code that includes padlel current flow and EXB drifts. These efforts are directed at increasing the confidence level of models of the tokamak edge plasma so that we can predict the effect of planned upgrades to DIII-D (e.g., the Advanced Divertor Program) and the ... continued below

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48 p.; Other: FDE: PDF; PL:

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Hill, D.N.; Buchenauer, D.; Carlstrom, T.N.; Ferron, J. & Resink, M. December 4, 1989.

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We are in the process of assembling a database of edge and divertor plasma parameters suitable for use in benchmarking tious 2D models of the scrape-off- layer (SOL) plasma. Also, we are using the Braams B2 code to derive transport coefficients for the edge plssma. In parallel, work is starting on an upgrade to the B2 code that includes padlel current flow and EXB drifts. These efforts are directed at increasing the confidence level of models of the tokamak edge plasma so that we can predict the effect of planned upgrades to DIII-D (e.g., the Advanced Divertor Program) and the performance of next generation machines such as CIT or ITER, where initial design studies show that plasma conditions at the divertor targets can have a large impact on the lifetime and cost of the machine. This report summarizes our recent progress in characterizing the DIII-D SOL plasma and in modeling these data with the the B2 code. Section I contains a brief description of the diagnostics available for characterizing the SOL plasma. In Section II we present our measurements of the SOL parameters for H-mode plasmas. This includes data showing how the divertor plasma parameters (n{sub e}(r), T{sub e}(r), and Q(r)) vary from ohmic to L-mode to H-mode, and power balance for quasi-stationary H-mode plasmas. Section III covers divertor-target heat-flux asymmetries for double and single null operation with forward and reversed toroidal field. In Section IV we show the scaling of L-mode parameters with neutral beam power, and Section V concludes with a summary of the results obtained from the Braams B2 SOL simulation code.

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48 p.; Other: FDE: PDF; PL:

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OSTI as DE98057429

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  • Other Information: PBD: 4 Dec 1989

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  • Other: DE98057429
  • Report No.: UCID--21833
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/303925 | External Link
  • Office of Scientific & Technical Information Report Number: 303925
  • Archival Resource Key: ark:/67531/metadc684070

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  • December 4, 1989

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 16, 2016, 6:26 p.m.

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Hill, D.N.; Buchenauer, D.; Carlstrom, T.N.; Ferron, J. & Resink, M. DIII-D data for modeling the scrape-off-layer plasma, report, December 4, 1989; California. (digital.library.unt.edu/ark:/67531/metadc684070/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.