Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Simulations of a high-density, highly-radiating lithium divertor

Abstract

Results are presented for one- and two-dimensional (2D) edge plasma transport simulations for strong injection of lithium (Li) in the divertor region of a tokamak. The model includes the scrape-off layer and divertor regions, and, for 2D, a small region inside the magnetic separtrix. Equations are solved for the density and momentum of a deuterium/tritium (DT) species and all three charge states of Li, in addition to separate ion and electron energy equations via the UEDGE code. Equations are also included for the DT and Li gas species. Lithium gas is injected from the side walls or divertor plate, implying that these surfaces are evaporating liquid Li. For a range of Li gas input, steady-state, detached-plasma solutions are shown where greater than 90% of the exhaust power is radiated by Li, resulting in peak surface heat fluxes ~2 MW/m2 on the divertor plate, outer wall, and private-flux wall. While Li ions dominate in the divertor leg, their density is in the range of 10% of the DT density at the midplane. The collisional parallel thermal force plays a key role in determining the midplane ion Li density, and sensitivity of results to different model assumptions are discussed. Here the keymore » issue is possible dilution of the core DT fuel. A brief comparison of the Li neutral solution is made with that from the Direct Simulation Monte-Carlo (DSMC) SPARTA code.« less

Authors:
 [1];  [1]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [2]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1511432
Grant/Contract Number:  
AC02-09CH11466; AC52-07NA27344; AC02-76CHO3073
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Volume: 18; 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

Rognlien, T. D., Rensink, M. E., Emdee, E., Goldston, R. J., Schwartz, J., and Stotler, D. P. Simulations of a high-density, highly-radiating lithium divertor. United States: N. p., 2019. Web. doi:10.1016/j.nme.2018.12.030.
Copy to clipboard
Rognlien, T. D., Rensink, M. E., Emdee, E., Goldston, R. J., Schwartz, J., & Stotler, D. P. Simulations of a high-density, highly-radiating lithium divertor. United States. https://doi.org/10.1016/j.nme.2018.12.030
Copy to clipboard
Rognlien, T. D., Rensink, M. E., Emdee, E., Goldston, R. J., Schwartz, J., and Stotler, D. P. Tue . "Simulations of a high-density, highly-radiating lithium divertor". United States. https://doi.org/10.1016/j.nme.2018.12.030. https://www.osti.gov/servlets/purl/1511432.
Copy to clipboard
@article{osti_1511432,
title = {Simulations of a high-density, highly-radiating lithium divertor},
author = {Rognlien, T. D. and Rensink, M. E. and Emdee, E. and Goldston, R. J. and Schwartz, J. and Stotler, D. P.},
abstractNote = {Results are presented for one- and two-dimensional (2D) edge plasma transport simulations for strong injection of lithium (Li) in the divertor region of a tokamak. The model includes the scrape-off layer and divertor regions, and, for 2D, a small region inside the magnetic separtrix. Equations are solved for the density and momentum of a deuterium/tritium (DT) species and all three charge states of Li, in addition to separate ion and electron energy equations via the UEDGE code. Equations are also included for the DT and Li gas species. Lithium gas is injected from the side walls or divertor plate, implying that these surfaces are evaporating liquid Li. For a range of Li gas input, steady-state, detached-plasma solutions are shown where greater than 90% of the exhaust power is radiated by Li, resulting in peak surface heat fluxes ~2 MW/m2 on the divertor plate, outer wall, and private-flux wall. While Li ions dominate in the divertor leg, their density is in the range of 10% of the DT density at the midplane. The collisional parallel thermal force plays a key role in determining the midplane ion Li density, and sensitivity of results to different model assumptions are discussed. Here the key issue is possible dilution of the core DT fuel. A brief comparison of the Li neutral solution is made with that from the Direct Simulation Monte-Carlo (DSMC) SPARTA code.},
doi = {10.1016/j.nme.2018.12.030},
journal = {Nuclear Materials and Energy},
number = C,
volume = 18,
place = {United States},
year = {Tue Jan 08 00:00:00 EST 2019},
month = {Tue Jan 08 00:00:00 EST 2019}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.nme.2018.12.030
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: Radiation rate coeffcients versus Te for each lithium charge state. From ADAS [12].
All figures and tables (7 total)
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

On lithium walls and the performance of magnetic fusion devices
journal, May 2003

  • Krasheninnikov, S. I.; Zakharov, L. E.; Pereverzev, G. V.
  • Physics of Plasmas, Vol. 10, Issue 5
  • DOI: 10.1063/1.1558293

Liquid lithium applications for solving challenging fusion reactor issues and NSTX-U contributions
journal, April 2017

Overview of the fusion nuclear science facility, a credible break-in step on the path to fusion energy
journal, October 2018

Scrape-off layer plasma and neutral characteristics and their interactions with walls for FNSF
journal, October 2018

Plasma Edge Physics with B2-Eirene
journal, February 2006

  • Schneider, R.; Bonnin, X.; Borrass, K.
  • Contributions to Plasma Physics, Vol. 46, Issue 1-2
  • DOI: 10.1002/ctpp.200610001

Scrape-off layer model for the study of impurity retention in the pumped divertor planned for JET
journal, March 1991

Generalised collisional-radiative model for light elements. A: Data for the Li isonuclear sequence
journal, November 2006

  • Loch, S. D.; Colgan, J.; Witthoeft, M. C.
  • Atomic Data and Nuclear Data Tables, Vol. 92, Issue 6
  • DOI: 10.1016/j.adt.2006.04.001

Impurity transport in edge plasmas with application to liquid walls
journal, May 2002

  • Rognlien, T. D.; Rensink, M. E.
  • Physics of Plasmas, Vol. 9, Issue 5
  • DOI: 10.1063/1.1461384
    Sort by:
    [ × clear filter / sort ]

    Works referencing / citing this record:

    Vapor shielding of liquid lithium divertor target during steady state and transient events
    journal, January 2020

      Sort by:
      [ × clear filter / sort ]

      Figures / Tables found in this record:

      Figure 1 (p. 3)figure
      Figure 2 (p. 4)figure
      Figure 3 (p. 4)figure
      Figure 4 (p. 5)figure
      Figure 5 (p. 5)figure
      Figure 6 (p. 6)figure
      Figure 7 (p. 7)figure
        [ × clear filter / sort ]
        Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

        Similar Records in DOE PAGES and OSTI.GOV collections: