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

Abstract

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.

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [3];  [3];  [5];  [3];  [5]; ORCiD logo [5];  [4];  [6];  [3];  [6];  [3];  [1];  [3]; ORCiD logo [7];  [8];  [9] more »;  [5]; ORCiD logo [7] « less
  1. Aalto Univ., Espoo (Finland)
  2. Univ. of California, San Diego, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. General Atomics, San Diego, CA (United States)
  5. Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research Plasma Physics, Jülich (Germany)
  6. Culham Centre for Fusion Energy, Culham Science Centre, Abingdon (United Kingdom)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  9. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1502527
Grant/Contract Number:  
AC05-00OR22725; FC02-04ER54698; AC52-07NA27344; FG92-07ER54917
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Volume: 19; Journal Issue: C; Journal ID: ISSN 2352-1791
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Groth, M., Hollmann, E. M., Jaervinen, A. E., Leonard, A. W., McLean, A. G., Samuell, C. M., Reiter, D., Allen, S. L., Boerner, P., Brezinsek, S., Bykov, I., Corrigan, G., Fenstermacher, M. E., Harting, D., Lasnier, C. J., Lomanowski, B., Makowski, M. A., Shafer, Morgan W., Wang, H. Q., Watkins, J. G., Wiesen, S., and Wilcox, Robert S.. EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas. United States: N. p., 2019. Web. doi:10.1016/j.nme.2019.02.035.
Groth, M., Hollmann, E. M., Jaervinen, A. E., Leonard, A. W., McLean, A. G., Samuell, C. M., Reiter, D., Allen, S. L., Boerner, P., Brezinsek, S., Bykov, I., Corrigan, G., Fenstermacher, M. E., Harting, D., Lasnier, C. J., Lomanowski, B., Makowski, M. A., Shafer, Morgan W., Wang, H. Q., Watkins, J. G., Wiesen, S., & Wilcox, Robert S.. EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas. United States. doi:10.1016/j.nme.2019.02.035.
Groth, M., Hollmann, E. M., Jaervinen, A. E., Leonard, A. W., McLean, A. G., Samuell, C. M., Reiter, D., Allen, S. L., Boerner, P., Brezinsek, S., Bykov, I., Corrigan, G., Fenstermacher, M. E., Harting, D., Lasnier, C. J., Lomanowski, B., Makowski, M. A., Shafer, Morgan W., Wang, H. Q., Watkins, J. G., Wiesen, S., and Wilcox, Robert S.. Tue . "EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas". United States. doi:10.1016/j.nme.2019.02.035. https://www.osti.gov/servlets/purl/1502527.
@article{osti_1502527,
title = {EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas},
author = {Groth, M. and Hollmann, E. M. and Jaervinen, A. E. and Leonard, A. W. and McLean, A. G. and Samuell, C. M. and Reiter, D. and Allen, S. L. and Boerner, P. and Brezinsek, S. and Bykov, I. and Corrigan, G. and Fenstermacher, M. E. and Harting, D. and Lasnier, C. J. and Lomanowski, B. and Makowski, M. A. and Shafer, Morgan W. and Wang, H. Q. and Watkins, J. G. and Wiesen, S. and Wilcox, Robert S.},
abstractNote = {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.},
doi = {10.1016/j.nme.2019.02.035},
journal = {Nuclear Materials and Energy},
number = C,
volume = 19,
place = {United States},
year = {2019},
month = {3}
}

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