Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration

被引：1

作者：

Wei, X. S. ^{[1
]}

Wang, W. H. ^{[1
]}

Lin, Z. ^{[1
]}

Choi, G. J. ^{[1
]}

Dettrick, S. ^{[2
]}

Lau, C. ^{[2
]}

Liu, P. F. ^{[1
]}

Tajima, T. ^{[1
,2
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[2] TAE Technol Inc, Foothill Ranch, CA 92610 USA

来源：

NUCLEAR FUSION | 2021年 / 61卷 / 12期

关键词：

zonal flow; field-reversed configuration; ITG mode; turbulent transport; GYROKINETIC PARTICLE SIMULATION; E X B; TURBULENCE; TRANSPORT; DRIVEN;

D O I：

10.1088/1741-4326/ac3023

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：

Gyrokinetic simulations of long wavelength ion temperature gradient (ITG) turbulence in the scrape-off layer (SOL) of a field-reversed configuration (FRC) find that zonal flows are nonlinearly generated and are the dominant mechanism for the nonlinear saturation of the ITG instability. After the ITG saturation, zonal flows remain undamped and gradually suppress the turbulent transport to a very low level. In the simulations with collisions, collisional damping gradually reduces zonal flow amplitude to a lower level, which allows finite ITG turbulence intensity and ion heat transport in the SOL. The steady state turbulence intensity and ion heat transport are found to be proportional to the collision frequency. This favorable scaling suggests that minimizing collisions (e.g. increasing temperature, reducing impurity content, etc) and preserving toroidal symmetry could improve plasma confinement in the FRC.

引用

页数：11

共 40 条

[1] Global simulation of ion temperature gradient instabilities in a field-reversed configuration
Bao, J.
Lau, C. K.
Lin, Z.
Wang, H. Y.
Fulton, D. P.
Dettrick, S.
Tajima, T.
[J]. PHYSICS OF PLASMAS, 2019, 26 (04)
[2] A high performance field-reversed configuration
Binderbauer, M. W.
Tajima, T.
Steinhauer, L. C.
Garate, E.
Tuszewski, M.
Schmitz, L.
Guo, H. Y.
Smirnov, A.
Gota, H.
Barnes, D.
Deng, B. H.
Thompson, M. C.
Trask, E.
Yang, X.
Putvinski, S.
Rostoker, N.
Andow, R.
Aefsky, S.
Bolte, N.
Bui, D. Q.
Ceccherini, F.
Clary, R.
Cheung, A. H.
Conroy, K. D.
Dettrick, S. A.
Douglass, J. D.
Feng, P.
Galeotti, L.
Giammanco, F.
Granstedt, E.
Gupta, D.
Gupta, S.
Ivanov, A. A.
Kinley, J. S.
Knapp, K.
Korepanov, S.
Hollins, M.
Magee, R.
Mendoza, R.
Mok, Y.
Necas, A.
Primavera, S.
Onofri, M.
Osin, D.
Rath, N.
Roche, T.
Romero, J.
Schroeder, J. H.
Sevier, L.
Sibley, A.
[J]. PHYSICS OF PLASMAS, 2015, 22 (05)
[3] Excitation of zonal flow by drift waves in toroidal plasmas
Chen, L
Lin, ZH
White, R
[J]. PHYSICS OF PLASMAS, 2000, 7 (08) : 3129 - 3132
[4] Zonal flows in plasma - a review
Diamond, PH
Itoh, SI
Itoh, K
Hahm, TS
[J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (05) : R35 - R161
[5] PARTIALLY LINEARIZED ALGORITHMS IN GYROKINETIC PARTICLE SIMULATION
DIMITS, AM
LEE, WW
[J]. JOURNAL OF COMPUTATIONAL PHYSICS, 1993, 107 (02) : 309 - 323
[6] Comparisons and physics basis of tokamak transport models and turbulence simulations
Dimits, AM
Bateman, G
Beer, MA
Cohen, BI
Dorland, W
Hammett, GW
Kim, C
Kinsey, JE
Kotschenreuther, M
Kritz, AH
Lao, LL
Mandrekas, J
Nevins, WM
Parker, SE
Redd, AJ
Shumaker, DE
Sydora, R
Weiland, J
[J]. PHYSICS OF PLASMAS, 2000, 7 (03) : 969 - 983
[7] Gyrokinetic simulation of driftwave instability in field-reversed configuration
Fulton, D. P.
Lau, C. K.
Schmitz, L.
Holod, I.
Lin, Z.
Tajima, T.
Binderbauer, M. W.
[J]. PHYSICS OF PLASMAS, 2016, 23 (05)
[8] Gyrokinetic particle simulation of a field reversed configuration
Fulton, D. P.
Lau, C. K.
Holod, I.
Lin, Z.
Dettrick, S.
[J]. PHYSICS OF PLASMAS, 2016, 23 (01)
[9] Plasma equilibria with multiple ion species: Equations and algorithm
Galeotti, L.
Barnes, D. C.
Ceccherini, F.
Pegoraro, F.
[J]. PHYSICS OF PLASMAS, 2011, 18 (08)
[10] Formation of hot, stable, long-lived field-reversed configuration plasmas on the C-2W device
Gota, H.
Binderbauer, M. W.
Tajima, T.
Putvinski, S.
Tuszewski, M.
Deng, B. H.
Dettrick, S. A.
Gupta, D. K.
Korepanov, S.
Magee, R. M.
Roche, T.
Romero, J. A.
Smirnov, A.
Sokolov, V
Song, Y.
Steinhauer, L. C.
Thompson, M. C.
Trask, E.
Van Drie, A. D.
Yang, X.
Yushmanov, P.
Zhai, K.
Allfrey, I
Andow, R.
Barraza, E.
Beall, M.
Bolte, N. G.
Bomgardner, E.
Ceccherini, F.
Chirumamilla, A.
Clary, R.
DeHaas, T.
Douglass, J. D.
DuBois, A. M.
Dunaevsky, A.
Fallah, D.
Feng, P.
Finucane, C.
Fulton, D. P.
Galeotti, L.
Galvin, K.
Granstedt, E. M.
Griswold, M. E.
Guerrero, U.
Gupta, S.
Hubbard, K.
Isakov, I.
Kinley, J. S.
Korepanov, A.
Krause, S.
[J]. NUCLEAR FUSION, 2019, 59 (11)

← 1 2 3 4 →