Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Multi-Fluid Modeling of Low-Recycling Divertor Regimes

Journal Article · · Contributions to Plasma Physics
 [1];  [1];  [1];  [2];  [2];  [2];  [3];  [4];  [4];  [4];  [4]
  1. University of California, San Diego, CA (United States)
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
+ Show Author Affiliations
Here, the low-recycling regimes of divertor operation in a single-null NSTX magnetic configuration are studied using computer simulations with the edge plasma transport code UEDGE. The edge plasma transport properties pertinent to the low-recycling regimes are demonstrated. These include the flux-limited character of the parallel heat transport and the high plasma temperatures with the flattened profiles in the scrape-off-layer. It is shown that to maintain the balance of particle fluxes at the core interface the deuterium gas puffing rate should increase as the divertor recycling coefficient decreases. The radial profiles of the heat load to the outer divertor plate, the upstream radial plasma profiles, and the effects of the cross-field plasma transport in the low-recycling regimes are discussed. It is also shown that recycling of lithium impurities evaporating from the divertor plate at high surface temperatures can reverse the low-recycling divertor operational regime to the high-recycling one and may cause thermal instability of the divertor plate.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-09CH11466; AC52-07NA27344
OSTI ID:
1898295
Alternate ID(s):
OSTI ID: 1170767
OSTI ID: 21330259
Report Number(s):
LLNL-JRNL-416507; 377828
Journal Information:
Contributions to Plasma Physics, Journal Name: Contributions to Plasma Physics Journal Issue: 3-5 Vol. 50; ISSN 0863-1042
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (6)

Multi-Fluid Modeling of Large Parallel Plasma Flows in the Tokamak Scrape-Off Layer journal September 2006
A fully implicit, time dependent 2-D fluid code for modeling tokamak edge plasmas journal December 1992
Effect of lithium PFC coatings on NSTX density control journal June 2007
Evaporated lithium surface coatings in NSTX journal June 2009
On lithium walls and the performance of magnetic fusion devices journal May 2003
On temperature bifurcation of beryllium and lithium plasma facing components journal December 2009

Similar Records

Multi-Fluid Modeling of Low-Recycling Divertor Regimes
Conference · Thu Dec 31 23:00:00 EST 2009 · OSTI ID:1019013
Simulations of NSTX with a Liquid Lithium Divertor Module
Conference · Tue Jul 08 00:00:00 EDT 2008 · OSTI ID:958413
Simulations of NSTX with a Liquid Lithium Divertor Module
Technical Report · Wed Feb 17 23:00:00 EST 2010 · OSTI ID:973090

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
UEDGE
divertor
edge plasma transport
liquid lithium
recycling