skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Time-dependent modeling of coupled plasma-wall dynamics

Abstract

Effects of dynamic wall outgassing on divertor plasma during an ELM-like heat pulse are modelled using newly coupled edge plasma code UEDGE and all reaction-diffusion code FACE. Different divertor regimes are simulated depending on the degree of the plasma detachment. It is shown that hydrogen outgassing from the divertor target plate induced by ELM pulse in the semi-detached regime can trigger deep plasma detachment. The induced detachment does not spontaneously reverse after the pulse due to ineffective implantation of low energy plasma hydrogen in the target material. Furthermore, we demonstrate that plasma neutrals play essential role in heat transport in a detached divertor. The modelled hydrogen dynamics in the wall material demonstrates that the heat pulse leads to enhanced hydrogen transport toward the wall bulk.

Authors:
ORCiD logo [1];  [1];  [2]
  1. Univ. of California, San Diego, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1603069
Alternate Identifier(s):
OSTI ID: 1603188
Grant/Contract Number:  
SC0018302
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 27; Journal Issue: 3; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Smirnov, R. D., Krasheninnikov, S. I., and Umansky, M. V. Time-dependent modeling of coupled plasma-wall dynamics. United States: N. p., 2020. Web. https://doi.org/10.1063/1.5140183.
Smirnov, R. D., Krasheninnikov, S. I., & Umansky, M. V. Time-dependent modeling of coupled plasma-wall dynamics. United States. https://doi.org/10.1063/1.5140183
Smirnov, R. D., Krasheninnikov, S. I., and Umansky, M. V. Thu . "Time-dependent modeling of coupled plasma-wall dynamics". United States. https://doi.org/10.1063/1.5140183. https://www.osti.gov/servlets/purl/1603069.
@article{osti_1603069,
title = {Time-dependent modeling of coupled plasma-wall dynamics},
author = {Smirnov, R. D. and Krasheninnikov, S. I. and Umansky, M. V.},
abstractNote = {Effects of dynamic wall outgassing on divertor plasma during an ELM-like heat pulse are modelled using newly coupled edge plasma code UEDGE and all reaction-diffusion code FACE. Different divertor regimes are simulated depending on the degree of the plasma detachment. It is shown that hydrogen outgassing from the divertor target plate induced by ELM pulse in the semi-detached regime can trigger deep plasma detachment. The induced detachment does not spontaneously reverse after the pulse due to ineffective implantation of low energy plasma hydrogen in the target material. Furthermore, we demonstrate that plasma neutrals play essential role in heat transport in a detached divertor. The modelled hydrogen dynamics in the wall material demonstrates that the heat pulse leads to enhanced hydrogen transport toward the wall bulk.},
doi = {10.1063/1.5140183},
journal = {Physics of Plasmas},
number = 3,
volume = 27,
place = {United States},
year = {2020},
month = {3}
}

Works referenced in this record:

Neutral recycling effects on ITG turbulence
journal, July 2017


Impact of wall saturation on particle control in long and high-power-heated discharges in JT-60U
journal, April 2006


Physics basis for the first ITER tungsten divertor
journal, August 2019


Multi-fluid transport code modeling of time-dependent recycling in ELMy H-mode
journal, June 2014

  • Pigarov, A. Yu.; Krasheninnikov, S. I.; Rognlien, T. D.
  • Physics of Plasmas, Vol. 21, Issue 6
  • DOI: 10.1063/1.4885346

A fully implicit, time dependent 2-D fluid code for modeling tokamak edge plasmas
journal, December 1992


Simulation of Detachment in ITER-Geometry Using the UEDGE Code and a Fluid Neutral Model
journal, January 1996

  • Wising, F.; Knoll, D. A.; Krasheninnikov, S. I.
  • Contributions to Plasma Physics, Vol. 36, Issue 2-3
  • DOI: 10.1002/ctpp.2150360238

Analytical calculations for impurity seeded partially detached divertor conditions
journal, February 2016


Modeling of Multispecies Dynamics in Fusion-Related Materials with FACE
journal, January 2017

  • Smirnov, R. D.; Guterl, J.; Krasheninnikov, S. I.
  • Fusion Science and Technology, Vol. 71, Issue 1
  • DOI: 10.13182/FST16-125

Molecular dynamics simulation of deuterium trapping and bubble formation in tungsten
journal, March 2013


Hydrogen in tungsten: Absorption, diffusion, vacancy trapping, and decohesion
journal, February 2010

  • Johnson, Donald F.; Carter, Emily A.
  • Journal of Materials Research, Vol. 25, Issue 2
  • DOI: 10.1557/JMR.2010.0036

Solution and Diffusion of Hydrogen in Tungsten
journal, May 1969

  • Frauenfelder, R.
  • Journal of Vacuum Science and Technology, Vol. 6, Issue 3
  • DOI: 10.1116/1.1492699

Deuterium Transport and Trapping in Polycrystalline Tungsten
journal, March 1992

  • Anderl, R. A.; Holland, D. F.; Longhurst, G. R.
  • Fusion Technology, Vol. 21, Issue 2P2
  • DOI: 10.13182/FST92-A29837

Fundamental aspects of deuterium retention in tungsten at high flux plasma exposure
journal, August 2015

  • Ogorodnikova, O. V.
  • Journal of Applied Physics, Vol. 118, Issue 7
  • DOI: 10.1063/1.4928407

Edge and divertor plasma: detachment, stability, and plasma-wall interactions
journal, June 2017