Plasma edge and plasma-wall interaction modelling: Lessons learned from metallic devices

Wiesen, S.; Groth, M.; Wischmeier, M.; Brezinsek, S.; Jarvinen, A.; Reimold, F.; Aho-Mantila, L.

doi:10.1016/j.nme.2017.03.033

Title: Plasma edge and plasma-wall interaction modelling: Lessons learned from metallic devices

Journal Article · 01 August 2017 · Nuclear Materials and Energy

DOI: https://doi.org/10.1016/j.nme.2017.03.033 · OSTI ID:1497271

Wiesen, S. ^[1]; Groth, M. ^[2]; Wischmeier, M. ^[3]; Brezinsek, S. ^[1]; Jarvinen, A. ^[4]; Reimold, F. ^[1]; Aho-Mantila, L. ^[5]

Forschungszentrum Julich (Germany). Inst. für Energie- und Klimaforschung
Aalto Univ., Espoo (Finland)
Max-Planck-Inst. für Plasmaphysik, Garching (Germany)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
VTT Technical Research Centre of Finland Ltd, Espoo (Finland)

Robust power exhaust schemes employing impurity seeding are needed for target operational scenarios in present day tokamak devices with metallic plasma-facing components (PFCs). For an electricity-producing fusion power plant at power density P_sep/R > 15 MW/m divertor detachment is a requirement for heat load mitigation. 2D plasma edge transport codes like the SOLPS code as well as plasma-wall interaction (PWI) codes are key to disentangle relevant physical processes in power and particle exhaust. With increased quantitative credibility in such codes more realistic and physically sound estimates of the life-time expectations and performance of metallic PFCs can be accomplished for divertor conditions relevant for ITER and DEMO. An overview is given on the recent progress of plasma edge and PWI modelling activities for (carbon-free) metallic devices, that include results from JET with the ITER-like wall, ASDEX Upgrade and Alcator C-mod. It is observed that metallic devices offer an opportunity to progress the understanding of underlying plasma physics processes in the edge. The validation of models can be substantially improved by eliminating carbon from the experiment as well as from the numerical system with reduced degrees of freedom as no chemical sputtering from amorphous carbon layers and no carbon or hydro-carbon transport are present. With the absence of carbon as the primary plasma impurity and given the fact that the physics of the PWI at metallic walls is less complex it is possible to isolate the crucial plasma physics processes relevant for particle and power exhaust. Finally, for a reliable 2D dissipative plasma exhaust model these are: cross-field drifts, complete kinetic neutral physics, geometry effects (including main-chamber, divertor and sub-divertor structures), SOL transport reflecting also the non-diffusive nature of anomalous transport, as well as transport within the pedestal region in case of significant edge impurity radiation affecting pedestal pressure and hence P_sep.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); European Commission (EC)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1497271

Report Number(s):: LLNL-JRNL-752164; 930345

Journal Information:: Nuclear Materials and Energy, Vol. 12, Issue C; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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References (72)

Fuel retention studies with the ITER-Like Wall in JET Brezinsek, S.; Loarer, T.; Philipps, V. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/083023	journal	July 2013
Plasma isotopic change over experiments in JET under Carbon and ITER-Like Wall conditions Loarer, T.; Brezinsek, S.; Philipps, V. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.11.012	journal	August 2015
High density operation for reactor-relevant power exhaust Wischmeier, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.078	journal	August 2015
Plasma Edge Physics with B2-Eirene Schneider, R.; Bonnin, X.; Borrass, K. Contributions to Plasma Physics, Vol. 46, Issue 1-2 https://doi.org/10.1002/ctpp.200610001	journal	February 2006
Beryllium migration in JET ITER-like wall plasmas Brezinsek, S.; Widdowson, A.; Mayer, M. Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/063021	journal	May 2015
Plasma-surface interaction in the Be/W environment: Conclusions drawn from the JET-ILW for ITER Brezinsek, S. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.007	journal	August 2015
Sputtering Yields Eckstein, Wolfgang Topics in Applied Physics, p. 33-187 https://doi.org/10.1007/978-3-540-44502-9_3	book	January 2007
Modelling of Impurity Transport and Plasma-Wall Interaction in Fusion Devices with the ERO Code: Basics of the Code and Examples of Application: Modelling of Impurity Transport and Plasma-Wall Interaction in Fusion Devices with the ERO Code: Basics of the Code and Examples of Application Kirschner, A.; Tskhakaya, D.; Kawamura, G. Contributions to Plasma Physics, Vol. 56, Issue 6-8 https://doi.org/10.1002/ctpp.201610014	journal	July 2016
Full-tungsten plasma edge simulations with SOLPS Bonnin, X.; Coster, D. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.10.041	journal	August 2011
Melt-layer motion and droplet ejection under divertor-relevant plasma conditions De Temmerman, G.; Daniels, J.; Bystrov, K. Nuclear Fusion, Vol. 53, Issue 2 https://doi.org/10.1088/0029-5515/53/2/023008	journal	February 2013
Disruptions in ITER and strategies for their control and mitigation Lehnen, M.; Aleynikova, K.; Aleynikov, P. B. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.075	journal	August 2015
Numerical analysis of hydrogen risk mitigation measures for support of ITER licensing Xiao, J.; Travis, J. R.; Breitung, W. Fusion Engineering and Design, Vol. 85, Issue 2 https://doi.org/10.1016/j.fusengdes.2009.12.008	journal	April 2010
Impact of divertor geometry on radiative divertor performance in JET H-mode plasmas Jaervinen, A. E.; Brezinsek, S.; Giroud, C. Plasma Physics and Controlled Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/0741-3335/58/4/045011	journal	February 2016
Physics of the detached radiative divertor regime in DIII-D Fenstermacher, M. E.; Boedo, J.; Isler, R. C. Plasma Physics and Controlled Fusion, Vol. 41, Issue 3A https://doi.org/10.1088/0741-3335/41/3A/028	journal	January 1999
Numerical modelling of high density JET divertor plasma with the SOLPS4.2 (B2-EIRENE) code Kotov, V.; Reiter, D.; Pitts, R. A. Plasma Physics and Controlled Fusion, Vol. 50, Issue 10 https://doi.org/10.1088/0741-3335/50/10/105012	journal	September 2008
Relevance of collisionality in the transport model assumptions for divertor detachment multi-fluid modelling on JET Wiesen, S.; Fundamenski, W.; Wischmeier, M. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.12.010	journal	August 2011
Influence of atomic physics on EDGE2D-EIRENE simulations of JET divertor detachment with carbon and beryllium/tungsten plasma-facing components Guillemaut, C.; Pitts, R. A.; Kukushkin, A. S. Nuclear Fusion, Vol. 54, Issue 9 https://doi.org/10.1088/0029-5515/54/9/093012	journal	August 2014
Impurity seeding for tokamak power exhaust: from present devices via ITER to DEMO Kallenbach, A.; Bernert, M.; Dux, R. Plasma Physics and Controlled Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0741-3335/55/12/124041	journal	November 2013
Heat flux mitigation by impurity seeding in high-field tokamaks Reinke, M. L. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/aa5145	journal	January 2017
The new SOLPS-ITER code package Wiesen, S.; Reiter, D.; Kotov, V. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.012	journal	August 2015
Models and Numerics in the Multi-Fluid 2-D Edge Plasma Code EDGE2D/U Simonini, R.; Corrigan, G.; Radford, G. Contributions to Plasma Physics, Vol. 34, Issue 2-3 https://doi.org/10.1002/ctpp.2150340242	journal	January 1994
Progress in two-dimensional plasma edge modelling Reiter, D. Journal of Nuclear Materials, Vol. 196-198 https://doi.org/10.1016/S0022-3115(06)80014-0	journal	December 1992
Numerical modelling for divertor design of the WEST device with a focus on plasma–wall interactions Bufferand, H.; Ciraolo, G.; Marandet, Y. Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053025	journal	April 2015
Development of Integrated SOL/Divertor Code and Simulation Study in JAEA Kawashima, Hisato; Shimizu, Katsuhiro; Takizuka, Tomonori Plasma and Fusion Research, Vol. 1 https://doi.org/10.1585/pfr.1.031	journal	January 2006
Kinetic modelling of impurity transport in detached plasma for integrated divertor simulation with SONIC (SOLDOR/NEUT2D/IMPMC/EDDY) Shimizu, K.; Takizuka, T.; Ohya, K. Nuclear Fusion, Vol. 49, Issue 6 https://doi.org/10.1088/0029-5515/49/6/065028	journal	May 2009
A fully implicit, time dependent 2-D fluid code for modeling tokamak edge plasmas Rognlien, T. D.; Milovich, J. L.; Rensink, M. E. Journal of Nuclear Materials, Vol. 196-198 https://doi.org/10.1016/S0022-3115(06)80058-9	journal	December 1992
Neutral Gas Transport Modeling with DEGAS 2 Stotler, Daren; Karney, Charles Contributions to Plasma Physics, Vol. 34, Issue 2-3 https://doi.org/10.1002/ctpp.2150340246	journal	January 1994
Simulation of divertor pumping in JT-60U with SOLDOR/NEUT2D code Kawashima, H.; Shimizu, K.; Takizuka, T. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.127	journal	June 2007
The Chodura sheath for angles of a few degrees between the magnetic field and the surface of divertor targets and limiters Stangeby, P. C. Nuclear Fusion, Vol. 52, Issue 8 https://doi.org/10.1088/0029-5515/52/8/083012	journal	July 2012
The Particle-In-Cell Method Tskhakaya, D.; Matyash, K.; Schneider, R. Contributions to Plasma Physics, Vol. 47, Issue 8-9 https://doi.org/10.1002/ctpp.200710072	journal	December 2007
Comparing scrape-off layer and divertor physics in JET pure He and D discharges Pitts, R.; Andrew, P.; Andrew, Y. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01429-0	journal	March 2003
Divertor detachment during pure helium plasmas in JET Wischmeier, M.; Coster, D.; Bonnin, X. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01427-7	journal	March 2003
Modelling of island divertor physics and comparison to W7-AS experimental results Feng, Y.; Sardei, F.; Grigull, P. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01463-0	journal	March 2003
Recent Improvements in the EMC3-Eirene Code: Recent Improvements in the EMC3-Eirene Code Feng, Y.; Frerichs, H.; Kobayashi, M. Contributions to Plasma Physics, Vol. 54, Issue 4-6 https://doi.org/10.1002/ctpp.201410092	journal	June 2014
Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER Eich, T.; Leonard, A. W.; Pitts, R. A. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093031	journal	August 2013
Power load studies in JET and ASDEX-Upgrade with full-W divertors Sieglin, B.; Eich, T.; Scarabosio, A. Plasma Physics and Controlled Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0741-3335/55/12/124039	journal	November 2013
Heuristic drift-based model of the power scrape-off width in low-gas-puff H-mode tokamaks Goldston, R. J. Nuclear Fusion, Vol. 52, Issue 1 https://doi.org/10.1088/0029-5515/52/1/013009	journal	December 2011
Inter-ELM Power Decay Length for JET and ASDEX Upgrade: Measurement and Comparison with Heuristic Drift-Based Model Eich, T.; Sieglin, B.; Scarabosio, A. Physical Review Letters, Vol. 107, Issue 21 https://doi.org/10.1103/PhysRevLett.107.215001	journal	November 2011
Multi-machine scaling of the divertor peak heat flux and width for L-mode and H-mode discharges Loarte, A.; Bosch, S.; Chankin, A. Journal of Nuclear Materials, Vol. 266-269 https://doi.org/10.1016/S0022-3115(98)00590-X	journal	March 1999
Analysis of a multi-machine database on divertor heat fluxes Makowski, M. A.; Elder, D.; Gray, T. K. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.4710517	journal	May 2012
Investigation of scrape-off layer and divertor heat transport in ASDEX Upgrade L-mode Sieglin, B.; Eich, T.; Faitsch, M. Plasma Physics and Controlled Fusion, Vol. 58, Issue 5 https://doi.org/10.1088/0741-3335/58/5/055015	journal	April 2016
Scaling of the divertor power spreading (S-factor) in open and closed divertor operation in JET and ASDEX Upgrade Scarabosio, A.; Eich, T.; Hoppe, F. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.11.076	journal	August 2015
Partial detachment of high power discharges in ASDEX Upgrade Kallenbach, A.; Bernert, M.; Beurskens, M. Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053026	journal	April 2015
Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D–EIRENE Jaervinen, A. E.; Groth, M.; Airila, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.047	journal	August 2015
A new experimental classification of divertor detachment in ASDEX Upgrade Potzel, S.; Wischmeier, M.; Bernert, M. Nuclear Fusion, Vol. 54, Issue 1 https://doi.org/10.1088/0029-5515/54/1/013001	journal	November 2013
Divertor studies in nitrogen induced completely detached H-modes in full tungsten ASDEX Upgrade Reimold, F.; Wischmeier, M.; Bernert, M. Nuclear Fusion, Vol. 55, Issue 3 https://doi.org/10.1088/0029-5515/55/3/033004	journal	February 2015
Experimental studies and modeling of complete H-mode divertor detachment in ASDEX Upgrade Reimold, F.; Wischmeier, M.; Bernert, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.019	journal	August 2015
Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade Aho-Mantila, L.; Bonnin, X.; Coster, D. P. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.11.049	journal	August 2015
Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas Groth, M.; Brezinsek, S.; Belo, P. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.030	journal	August 2015
Simulation of neutral gas flow in a tokamak divertor using the Direct Simulation Monte Carlo method Gleason-González, Cristian; Varoutis, Stylianos; Hauer, Volker Fusion Engineering and Design, Vol. 89, Issue 7-8 https://doi.org/10.1016/j.fusengdes.2014.02.005	journal	October 2014
OSM-EIRENE modeling of neutral pressures in the Alcator C-Mod divertor Lisgo, S.; Börner, P.; Boswell, C. Journal of Nuclear Materials, Vol. 337-339 https://doi.org/10.1016/j.jnucmat.2004.09.073	journal	March 2005
Finalizing the ITER divertor design: The key role of SOLPS modeling Kukushkin, A. S.; Pacher, H. D.; Kotov, V. Fusion Engineering and Design, Vol. 86, Issue 12 https://doi.org/10.1016/j.fusengdes.2011.06.009	journal	December 2011
Self-consistent modeling of X-point MARFE and divertor detachment Kotov, Vladislav; Reiter, D.; Wiesen, S. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.091	journal	July 2013
Implications of high density operation on SOL transport: A multimachine investigation Carralero, D.; Müller, H. W.; Groth, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.019	journal	August 2015
Comparison of particle transport in the scrape-off layer plasmas of Alcator C-Mod and DIII-D Lipschultz, B.; Whyte, D.; LaBombard, B. Plasma Physics and Controlled Fusion, Vol. 47, Issue 10 https://doi.org/10.1088/0741-3335/47/10/001	journal	September 2005
Collisionality dependent transport in TCV SOL plasmas Garcia, O. E.; Pitts, R. A.; Horacek, J. Plasma Physics and Controlled Fusion, Vol. 49, Issue 12B https://doi.org/10.1088/0741-3335/49/12B/S03	journal	November 2007
Dissipative processes in interchange driven scrape-off layer turbulence Fundamenski, W.; Garcia, O. E.; Naulin, V. Nuclear Fusion, Vol. 47, Issue 5 https://doi.org/10.1088/0029-5515/47/5/006	journal	April 2007
Impact of large island perturbations on turbulent blob transport in tokamaks Reiser, D. Physics of Plasmas, Vol. 14, Issue 8 https://doi.org/10.1063/1.2771133	journal	August 2007
Variables affecting simulated Be sputtering yields Björkas, C.; Nordlund, K. Journal of Nuclear Materials, Vol. 439, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.04.036	journal	August 2013
Study of physical and chemical assisted physical sputtering of beryllium in the JET ITER-like wall Brezinsek, S.; Stamp, M. F.; Nishijima, D. Nuclear Fusion, Vol. 54, Issue 10 https://doi.org/10.1088/0029-5515/54/10/103001	journal	September 2014
Atomistic simulations of the effect of reactor-relevant parameters on be sputtering Safi, E.; Björkas, C.; Lasa, A. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.050	journal	August 2015
Modelling of the material transport and layer formation in the divertor of JET: Comparison of ITER-like wall with full carbon wall conditions Kirschner, A.; Matveev, D.; Borodin, D. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.072	journal	August 2015
An integrated model of impurity migration and wall composition dynamics for tokamaks Schmid, K.; Reinelt, M.; Krieger, K. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2011.01.105	journal	August 2011
Implementation of a diffusion convection surface evolution model in WallDYN Schmid, K. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.099	journal	July 2013
Investigation of the influence of divertor recycling on global plasma confinement in JET ITER-like wall Tamain, P.; Joffrin, E.; Bufferand, H. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.021	journal	August 2015
Intra-ELM phase modelling of a JET ITER-like wall H-mode discharge with EDGE2D-EIRENE Harting, D. M.; Wiesen, S.; Groth, M. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.023	journal	August 2015
JINTRAC: A System of Codes for Integrated Simulation of Tokamak Scenarios Romanelli, Michele; Corrigan, Gerard; Parail, Vassili Plasma and Fusion Research, Vol. 9, Issue 0 https://doi.org/10.1585/pfr.9.3403023	journal	January 2014
Integrated Modelling of Nitrogen Seeded JET Discharges Zagórski, R.; Telesca, G.; Rapp, J. Contributions to Plasma Physics, Vol. 48, Issue 1-3 https://doi.org/10.1002/ctpp.200810032	journal	March 2008
Non-dimensional transport study on ELMy H-mode plasmas in JT-60U Shirai, H.; Takizuka, T.; Koide, Y. Plasma Physics and Controlled Fusion, Vol. 42, Issue 11 https://doi.org/10.1088/0741-3335/42/11/306	journal	November 2000
High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade Wischmeier, M.; Kallenbach, A.; Chankin, A. V. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.041	journal	June 2007
Effect of PFC Recycling Conditions on JET Pedestal Density: Effect of PFC Recycling Conditions on JET Pedestal Density Wiesen, S.; Brezinsek, S.; Harting, D. Contributions to Plasma Physics, Vol. 56, Issue 6-8 https://doi.org/10.1002/ctpp.201610015	journal	July 2016
Turbulent transport and the plasma edge Naulin, V. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2006.12.058	journal	June 2007

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