Time-dependent modeling of coupled plasma-wall dynamics

Smirnov, R. D.; Krasheninnikov, S. I.; Umansky, M. V.

doi:10.1063/1.5140183

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:

^[1]; Krasheninnikov, S. I. ^[1]; Umansky, M. V. ^[2]

Univ. of California, San Diego, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: 2020-03-05

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.  doi:10.1063/1.5140183.

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                    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

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                    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.

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@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}

}

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Works referenced in this record:

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Wising, F.; Knoll, D. A.; Krasheninnikov, S. I.
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Dynamic modelling of local fuel inventory and desorption in the whole tokamak vacuum vessel for auto-consistent plasma-wall interaction simulations
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Analytical calculations for impurity seeded partially detached divertor conditions
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journal, June 2014

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journal, February 2010

Johnson, Donald F.; Carter, Emily A.
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Similar Records

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

Abstract

Citation Formats

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

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

Dynamic modelling of local fuel inventory and desorption in the whole tokamak vacuum vessel for auto-consistent plasma-wall interaction simulations journal, May 2019

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

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

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

Neutral recycling effects on ITG turbulence journal, July 2017

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

Solution and Diffusion of Hydrogen in Tungsten journal, May 1969

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

Deuterium Transport and Trapping in Polycrystalline Tungsten journal, March 1992

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

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

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

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

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

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

Dynamic modelling of local fuel inventory and desorption in the whole tokamak vacuum vessel for auto-consistent plasma-wall interaction simulations
journal, May 2019

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

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

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

Neutral recycling effects on ITG turbulence
journal, July 2017

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

Solution and Diffusion of Hydrogen in Tungsten
journal, May 1969

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

Deuterium Transport and Trapping in Polycrystalline Tungsten
journal, March 1992

Impact of wall saturation on particle control in long and high-power-heated discharges in JT-60U
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Modeling of Multispecies Dynamics in Fusion-Related Materials with FACE
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Hydrogen in tungsten: Absorption, diffusion, vacancy trapping, and decohesion
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