A reduced model of neutral-plasma interactions in the edge and scrape-off-layer: Verification comparisons with kinetic Monte Carlo simulations

Russell, D. A.; Myra, J. R.; Stotler, D. P.

doi:10.1063/1.5081670

Title: A reduced model of neutral-plasma interactions in the edge and scrape-off-layer: Verification comparisons with kinetic Monte Carlo simulations

Journal Article · 31 January 2019 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5081670 · OSTI ID:1497410

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Lodestar Research Corporation, Boulder, CO (United States); Lodestar Research Corporation
Lodestar Research Corporation, Boulder, CO (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

The 2D scrape-off-layer turbulence code (SOLT) is extended to include neutral-plasma interactions. A Boltzmann equation is derived for the evolution of the bi-normally-averaged neutral distribution function, G(_x,vx,t), in the radial dimension, and this evolution is included in the new code (nSOLT). Neutral-plasma interactions are mediated by charge-exchange (CX) and ionization rates based on poloidally-averaged plasma density and temperature. Good agreement is obtained between asymptotically stationary neutral density profiles from nSOLT simulations and those previously obtained from the Monte Carlo neutral transport code DEGAS 2, for time-averaged NSTX H-mode plasma profiles. The sensitivity of the nSOLT neutral profiles to atomic physics parameters, with and without CX physics, is included in the comparison. In addition, nSOLT simulations that evolve the plasma in 1D, using radial diffusion as a proxy for turbulent (blob) transport, illustrate the convergence to a self-consistent neutral-plasma equilibrium sustained by a neutral source at the far-SOL boundary and plasma heating in the core; equilibria consistent with typical NSTX Ohmic L-mode plasmas are described.

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Research Organization:: Lodestar Research Corporation, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: FG02-97ER54392

OSTI ID:: 1497410

Report Number(s):: LRC--18-176

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 26; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (37)

Coupling of Parallelized DEGAS 2 and UEDGE Codes Stotler, D. P.; Karney, C. F. F.; Rensink, M. E. Contributions to Plasma Physics, Vol. 40, Issue 3-4 https://doi.org/10.1002/1521-3986(200006)40:3/4<221::AID-CTPP221>3.0.CO;2-L	journal	June 2000
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
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
Elementary Processes in Hydrogen-Helium Plasmas: Cross Sections and Reaction Rate Coefficients Janev, Ratko K.; Langer, William D.; Post, Douglass E. Springer Series on Atoms and Plasmas https://doi.org/10.1007/978-3-642-71935-6	book	January 1987
Survey of atomic processes in edge plasmas Janev, R. K.; Post, D. E.; Langer, W. D. Journal of Nuclear Materials, Vol. 121 https://doi.org/10.1016/0022-3115(84)90096-5	journal	May 1984
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
Recent theoretical progress in understanding coherent structures in edge and SOL turbulence Krasheninnikov, S. I.; D'Ippolito, D. A.; Myra, J. R. Journal of Plasma Physics, Vol. 74, Issue 5 https://doi.org/10.1017/S0022377807006940	journal	October 2008
Analytical and numerical study of the transverse Kelvin–Helmholtz instability in tokamak edge plasmas Myra, J. R.; D’Ippolito, D. A.; Russell, D. A. Journal of Plasma Physics, Vol. 82, Issue 2 https://doi.org/10.1017/S0022377816000301	journal	April 2016
Drift-ordered fluid equations for field-aligned modes in low-β collisional plasma with equilibrium pressure pedestals Simakov, Andrei N.; Catto, Peter J. Physics of Plasmas, Vol. 10, Issue 12 https://doi.org/10.1063/1.1623492	journal	December 2003
Erratum: “Drift-ordered fluid equations for field-aligned modes in low-β collisional plasma with equilibrium pressure pedestals” [Phys. Plasmas 10 , 4744 (2003)] Simakov, Andrei N.; Catto, Peter J. Physics of Plasmas, Vol. 11, Issue 5 https://doi.org/10.1063/1.1703527	journal	May 2004
Transport of perpendicular edge momentum by drift-interchange turbulence and blobs Myra, J. R.; Russell, D. A.; D’Ippolito, D. A. Physics of Plasmas, Vol. 15, Issue 3 https://doi.org/10.1063/1.2889419	journal	March 2008
Spontaneous rotation sources in a quiescent tokamak edge plasma Chang, C. S.; Ku, S. Physics of Plasmas, Vol. 15, Issue 6 https://doi.org/10.1063/1.2937116	journal	June 2008
Convective transport by intermittent blob-filaments: Comparison of theory and experiment D’Ippolito, D. A.; Myra, J. R.; Zweben, S. J. Physics of Plasmas, Vol. 18, Issue 6 https://doi.org/10.1063/1.3594609	journal	June 2011
Midplane neutral density profiles in the National Spherical Torus Experiment Stotler, D. P.; Scotti, F.; Bell, R. E. Physics of Plasmas, Vol. 22, Issue 8 https://doi.org/10.1063/1.4928372	journal	August 2015
Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width Russell, D. A.; D'Ippolito, D. A.; Myra, J. R. Physics of Plasmas, Vol. 22, Issue 9 https://doi.org/10.1063/1.4930285	journal	September 2015
Collisional transport across the magnetic field in drift-fluid models Madsen, J.; Naulin, V.; Nielsen, A. H. Physics of Plasmas, Vol. 23, Issue 3 https://doi.org/10.1063/1.4943199	journal	March 2016
Role of neutral gas in scrape-off layer of tokamak plasma in the presence of finite electron temperature and its gradient Bisai, N.; Kaw, P. K. Physics of Plasmas, Vol. 23, Issue 9 https://doi.org/10.1063/1.4962844	journal	September 2016
Global 3D two-fluid simulations of the tokamak edge region: Turbulence, transport, profile evolution, and spontaneous E × B rotation Zhu, Ben; Francisquez, Manaure; Rogers, Barrett N. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4978885	journal	May 2017
Influence of hot and cold neutrals on scrape-off layer tokamak plasma turbulence Bisai, N.; Kaw, P. K. Physics of Plasmas, Vol. 25, Issue 1 https://doi.org/10.1063/1.5002623	journal	January 2018
Plasma particle sources due to interactions with neutrals in a turbulent scrape-off layer of a toroidally confined plasma Thrysøe, A. S.; Løiten, M.; Madsen, J. Physics of Plasmas, Vol. 25, Issue 3 https://doi.org/10.1063/1.5019662	journal	March 2018
Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices Burrell, K. H. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872367	journal	May 1997
Two-dimensional electric fields and drifts near the magnetic separatrix in divertor tokamaks Rognlien, T. D.; Ryutov, D. D.; Mattor, N. Physics of Plasmas, Vol. 6, Issue 5 https://doi.org/10.1063/1.873488	journal	May 1999
Low-to-high confinement transition simulations in divertor geometry Xu, X. Q.; Cohen, R. H.; Rognlien, T. D. Physics of Plasmas, Vol. 7, Issue 5 https://doi.org/10.1063/1.874044	journal	May 2000
Plasma boundary phenomena in tokamaks Stangeby, P. C.; McCracken, G. M. Nuclear Fusion, Vol. 30, Issue 7 https://doi.org/10.1088/0029-5515/30/7/005	journal	July 1990
Analytical calculation of neutral transport and its effect on ions Hazeltine, R. D.; Calvin, M. D.; Valanju, P. M. Nuclear Fusion, Vol. 32, Issue 1 https://doi.org/10.1088/0029-5515/32/1/I01	journal	January 1992
A first-principles self-consistent model of plasma turbulence and kinetic neutral dynamics in the tokamak scrape-off layer Wersal, C.; Ricci, P. Nuclear Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0029-5515/55/12/123014	journal	November 2015
Edge and SOL turbulence and blob variations over a large database in NSTX Zweben, S. J.; Davis, W. M.; Kaye, S. M. Nuclear Fusion, Vol. 55, Issue 9 https://doi.org/10.1088/0029-5515/55/9/093035	journal	September 2015
Recent progress towards a physics-based understanding of the H-mode transition Tynan, G. R.; Cziegler, I.; Diamond, P. H. Plasma Physics and Controlled Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/0741-3335/58/4/044003	journal	January 2016
EDGE2D-EIRENE modelling of near SOL E _r : possible impact on the H-mode power threshold Chankin, A. V.; Delabie, E.; Corrigan, G. Plasma Physics and Controlled Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1361-6587/aa5ecc	journal	March 2017
Hermes: global plasma edge fluid turbulence simulations Dudson, B. D.; Leddy, J. Plasma Physics and Controlled Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1361-6587/aa63d2	journal	April 2017
Drive of parallel flows by turbulence and large-scale E × B transverse transport in divertor geometry Galassi, D.; Tamain, P.; Bufferand, H. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/aa5332	journal	February 2017
Neutral recycling effects on ITG turbulence Stotler, D. P.; Lang, J.; Chang, C. S. Nuclear Fusion, Vol. 57, Issue 8 https://doi.org/10.1088/1741-4326/aa7807	journal	July 2017
Impact of neutral density fluctuations on gas puff imaging diagnostics Wersal, C.; Ricci, P. Nuclear Fusion, Vol. 57, Issue 11 https://doi.org/10.1088/1741-4326/aa7db0	journal	August 2017
Influence of molecular dissociation on blob-induced atom density perturbations Thrysøe, A. S.; Madsen, J.; Naulin, V. Nuclear Fusion, Vol. 58, Issue 9 https://doi.org/10.1088/1741-4326/aac8a4	journal	July 2018
Plasma Facing Materials for the JET ITER-Like Wall Thomser, C.; Bailescu, V.; Brezinsek, S. Fusion Science and Technology, Vol. 62, Issue 1 https://doi.org/10.13182/FST12-A14103	journal	August 2012
Collisional transport across the magnetic field in drift-fluid models Madsen, Jens; Naulin, Volker; Nielsen, Anders Henry arXiv https://doi.org/10.48550/arxiv.1512.07425	text	January 2015
Hermes: Global plasma edge fluid turbulence simulations Dudson, Ben; Leddy, Jarrod arXiv https://doi.org/10.48550/arxiv.1609.03360	text	January 2016

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