DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modelling of edge plasma dynamics with active wall boundary conditions

Abstract

Abstract A self‐consistent 2D model is presented for transport in boundary plasma and plasma‐facing material walls. Plasma dynamics in the domain is represented by a 2D collisional plasma fluid model in the edge‐plasma code UEDGE (Rognlien et al., J. Nucl. Mater. 196–198 (1992) 347), and transport of hydrogen and heat in the wall is represented by a system of reaction–diffusion equations in the 1D wall code FACE (Smirnov et al., Fusion Sci. Technol. 71 (2017) 75). To account for variation of parameters along the wall, in the coupled model multiple instances of the FACE code run in parallel. The coupled model provides a tool for investigating a range of dynamic plasma–material interactions phenomena in 2D. For demonstration of its capability, one application of particular interest is the role of active wall in tokamak strike point sweeping proposed for mitigation of divertor heat loads. In the present study, the coupled calculations are applied to investigation of the impact of heat and hydrogen transport in the material wall on the divertor plasma and target heat load during sweeping of the target strike point for parameters of a high‐power tokamak.

Authors:
 [1];  [2]; ORCiD logo [3];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California San Diego, La Jolla, CA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)
OSTI Identifier:
1877479
Alternate Identifier(s):
OSTI ID: 1996582
Grant/Contract Number:  
AC05-00OR22725; AC52-07NA27344; SC0018302
Resource Type:
Accepted Manuscript
Journal Name:
Contributions to Plasma Physics
Additional Journal Information:
Journal Volume: 62; Journal Issue: 5-6; Journal ID: ISSN 0863-1042
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tokamak; plasma divertor

Citation Formats

Umansky, Maxim V., Smirnov, Roman D., Elwasif, Wael R., and Krasheninnikov, Sergei I. Modelling of edge plasma dynamics with active wall boundary conditions. United States: N. p., 2022. Web. doi:10.1002/ctpp.202100156.
Umansky, Maxim V., Smirnov, Roman D., Elwasif, Wael R., & Krasheninnikov, Sergei I. Modelling of edge plasma dynamics with active wall boundary conditions. United States. https://doi.org/10.1002/ctpp.202100156
Umansky, Maxim V., Smirnov, Roman D., Elwasif, Wael R., and Krasheninnikov, Sergei I. Sat . "Modelling of edge plasma dynamics with active wall boundary conditions". United States. https://doi.org/10.1002/ctpp.202100156. https://www.osti.gov/servlets/purl/1877479.
@article{osti_1877479,
title = {Modelling of edge plasma dynamics with active wall boundary conditions},
author = {Umansky, Maxim V. and Smirnov, Roman D. and Elwasif, Wael R. and Krasheninnikov, Sergei I.},
abstractNote = {Abstract A self‐consistent 2D model is presented for transport in boundary plasma and plasma‐facing material walls. Plasma dynamics in the domain is represented by a 2D collisional plasma fluid model in the edge‐plasma code UEDGE (Rognlien et al., J. Nucl. Mater. 196–198 (1992) 347), and transport of hydrogen and heat in the wall is represented by a system of reaction–diffusion equations in the 1D wall code FACE (Smirnov et al., Fusion Sci. Technol. 71 (2017) 75). To account for variation of parameters along the wall, in the coupled model multiple instances of the FACE code run in parallel. The coupled model provides a tool for investigating a range of dynamic plasma–material interactions phenomena in 2D. For demonstration of its capability, one application of particular interest is the role of active wall in tokamak strike point sweeping proposed for mitigation of divertor heat loads. In the present study, the coupled calculations are applied to investigation of the impact of heat and hydrogen transport in the material wall on the divertor plasma and target heat load during sweeping of the target strike point for parameters of a high‐power tokamak.},
doi = {10.1002/ctpp.202100156},
journal = {Contributions to Plasma Physics},
number = 5-6,
volume = 62,
place = {United States},
year = {Sat Feb 12 00:00:00 EST 2022},
month = {Sat Feb 12 00:00:00 EST 2022}
}

Works referenced in this record:

Continuum-scale modeling of helium bubble bursting under plasma-exposed tungsten surfaces
journal, November 2018

  • Blondel, Sophie; Bernholdt, David E.; Hammond, Karl D.
  • Nuclear Fusion, Vol. 58, Issue 12
  • DOI: 10.1088/1741-4326/aae8ef

A Software Package for Plasma-Facing Component Analysis and Design: The Heat Flux Engineering Analysis Toolkit (HEAT)
journal, January 2022


Divertor heat flux challenge and mitigation in SPARC
journal, September 2020


Mitigation of divertor heat loads by strike point sweeping in high power JET discharges
journal, October 2017


Impact of the JET ITER-like wall on H-mode plasma fueling
journal, April 2017


Progress with the 5D full-F continuum gyrokinetic code COGENT
journal, February 2020


The new SOLPS-ITER code package
journal, August 2015


The surface eroding thermocouple for fast heat flux measurement in DIII-D
journal, October 2018

  • Ren, J.; Donovan, D.; Watkins, J.
  • Review of Scientific Instruments, Vol. 89, Issue 10
  • DOI: 10.1063/1.5038677

Self-Consistent Simulations of the Plasma-Wall Transition Layer
journal, March 2008

  • Tskhakaya, D.; Kuhn, S.; Tomita, Y.
  • Contributions to Plasma Physics, Vol. 48, Issue 1-3
  • DOI: 10.1002/ctpp.200810021

Fast Parallel Algorithms for Short-Range Molecular Dynamics
journal, March 1995


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


Time-dependent modeling of coupled plasma-wall dynamics
journal, March 2020

  • Smirnov, R. D.; Krasheninnikov, S. I.; Umansky, M. V.
  • Physics of Plasmas, Vol. 27, Issue 3
  • DOI: 10.1063/1.5140183

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