Kinetic plasma-wall interaction using immersed boundary conditions

被引：1

作者：

Munschy, Yann ^{[1
]}

Bourne, Emily ^{[1
,2
]}

Dif-Pradalier, Guilhem ^{[1
]}

Donnel, Peter ^{[1
]}

Ghendrih, Philippe ^{[1
]}

Grandgirard, Virginie ^{[1
]}

Sarazin, Yanick ^{[1
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

[2] Ecole Polytech Fed Lausanne, SCITAS, CH-1015 Lausanne, Switzerland

来源：

NUCLEAR FUSION | 2024年 / 64卷 / 05期

基金：

欧盟地平线“2020”;

关键词：

Vlasov-Poisson system; immersed boundary conditions; penalization; gyrokinetics; kinetic sheath; kinetic plasma wall interaction; SHEATH; TRANSITION; TOKAMAK; TRANSPORT; ELECTRON; LIMITER; DRIVEN;

D O I：

10.1088/1741-4326/ad346c

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The interaction between a plasma and a solid surface is studied in a (1D-1V) kinetic approach using immersed boundary conditions and penalization to model the wall. Two solutions for the penalized wall region are investigated that either allow currents to flow within the material boundary or not. Essential kinetic aspects of sheath physics are recovered in both cases and their parametric dependencies investigated. Importantly, we show how the two approaches can be reconciled when accounting for relevant kinetic effects. Non-Maxwellian features of the ion and electron distribution functions are essential to capture the value of the potential drop in the sheath. These features lead to a sheath heat transmission factor for ions 60% larger than usually predicted and 35% for electrons. The role of collisions is discussed and means of incorporating minimally-relevant kinetic sheath physics in the gyrokinetic framework are discussed.

引用

页数：32

共 49 条

[1] A MODEL FOR COLLISION PROCESSES IN GASES .1. SMALL AMPLITUDE PROCESSES IN CHARGED AND NEUTRAL ONE-COMPONENT SYSTEMS
BHATNAGAR, PL
GROSS, EP
KROOK, M
[J]. PHYSICAL REVIEW, 1954, 94 (03): : 511 - 525
[2] Bohm D., 1949, CHARACTERISTICS ELEC
[3] Non-uniform splines for semi-Lagrangian kinetic simulations of the plasma sheath
Bourne, Emily
Munschy, Yann
Grandgirard, Virginie
Mehrenberger, Michel
Ghendrih, Philippe
[J]. JOURNAL OF COMPUTATIONAL PHYSICS, 2023, 488
[4] THE MECHANISM OF POSITIVE ION COLLECTION BY A SPHERICAL PROBE IN A DENSE GAS
BOYD, RLF
[J]. PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION B, 1951, 64 (381): : 795 - 804
[5] Numerical modelling for divertor design of the WEST device with a focus on plasma-wall interactions
Bufferand, H.
Ciraolo, G.
Marandet, Y.
Bucalossi, J.
Ghendrih, Ph.
Gunn, J.
Mellet, N.
Tamain, P.
Leybros, R.
Fedorczak, N.
Schwander, F.
Serre, E.
[J]. NUCLEAR FUSION, 2015, 55 (05)
[6] Near wall plasma simulation using penalization technique with the transport code SOLEDGE2D-EIRENE
Bufferand, H.
Bensiali, B.
Bucalossi, J.
Ciraolo, G.
Genesio, P.
Ghendrih, Ph.
Marandet, Y.
Paredes, A.
Schwander, F.
Serre, E.
Tamain, P.
[J]. JOURNAL OF NUCLEAR MATERIALS, 2013, 438 : S445 - S448
[7] Gyrokinetic projection of the divertor heat-flux width from present tokamaks to ITER
Chang, C. S.
Ku, S.
Loarte, A.
Parail, V.
Koechl, F.
Romanelli, M.
Maingi, R.
Ahn, J. -W.
Gray, T.
Hughes, J.
LaBombard, B.
Leonard, T.
Makowski, M.
Terry, J.
[J]. NUCLEAR FUSION, 2017, 57 (11)
[8] PLASMA-WALL TRANSITION IN AN OBLIQUE MAGNETIC-FIELD
CHODURA, R
[J]. PHYSICS OF FLUIDS, 1982, 25 (09) : 1628 - 1633
[9] Kinetic simulations of the Chodura and Debye sheaths for magnetic fields with grazing incidence
Coulette, David
Manfredi, Giovanni
[J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2016, 58 (02)
[10] Neoclassical physics in full distribution function gyrokinetics
Dif-Pradalier, G.
Diamond, P. H.
Grandgirard, V.
Sarazin, Y.
Abiteboul, J.
Garbet, X.
Ghendrih, Ph.
Latu, G.
Strugarek, A.
Ku, S.
Chang, C. S.
[J]. PHYSICS OF PLASMAS, 2011, 18 (06)

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