Zonal flows and long-distance correlations during the formation of the edge shear layer in the TJ-II stellarator

被引：10

作者：

Calvo, I. ^{[1
]}

Carreras, B. A. ^{[2
]}

Garcia, L. ^{[2
]}

Pedrosa, M. A. ^{[1
]}

Hidalgo, C. ^{[1
]}

机构：

[1] CIEMAT, Asociac EURATOM, Lab Nacl Fus, E-28040 Madrid, Spain

[2] Univ Carlos III Madrid, Madrid 28911, Spain

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2009年 / 51卷 / 06期

关键词：

GRADIENT-DRIVEN TURBULENCE; POLOIDAL FLOW; CONFINEMENT; TRANSPORT; GENERATION; EVOLUTION; TOKAMAK; PLASMA;

D O I：

10.1088/0741-3335/51/6/065007

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：

A theoretical interpretation is given for the observed long-distance correlations in potential fluctuations in TJ-II. The value of the correlation increases above the critical point of the transition for the emergence of the plasma edge shear flow layer. Mean (i.e. surface averaged, zero-frequency) sheared flows cannot account for the experimental results. A model consisting of four envelope equations for the fluctuation level, the mean flow shear, the zonal flow amplitude shear and the averaged pressure gradient is proposed. It is shown that the presence of zonal flows is essential to reproduce the main features of the experimental observations.

引用

页数：12

共 12 条

[1] Evidence of long-distance correlation of fluctuations during edge transitions to improved-confinement regimes in the TJ-II stellarator
Pedrosa, M. A.
Silva, C.
Hidalgo, C.
Carreras, B. A.
Orozco, R. O.
Carralero, D.
PHYSICAL REVIEW LETTERS, 2008, 100 (21)
[2] Identification of Zonal Flows and Their Spatial Distribution in the TJ-II Stellarator Plasmas
G. A. Sarancha
L. G. Eliseev
Ph. O. Khabanov
N. K. Kharchev
A. V. Melnikov
JETP Letters, 2022, 116 : 98 - 104
[3] Identification of Zonal Flows and Their Spatial Distribution in the TJ-II Stellarator Plasmas
Sarancha, G. A.
Eliseev, L. G.
Khabanov, Ph O.
Kharchev, N. K.
Melnikov, A., V
JETP LETTERS, 2022, 116 (02) : 98 - 104
[4] Spatial characterization of edge zonal flows in the TJ-II stellarator: the roles of plasma heating and isotope mass
Losada, U.
Kobayashi, T.
Ohshima, S.
Cappa, A.
Van Milligen, B.
Liniers, M.
Lopez-Miranda, B.
Liu, B.
Pastor, I
Silva, C.
Hidalgo, C.
PLASMA PHYSICS AND CONTROLLED FUSION, 2021, 63 (04)
[5] Long-Range Correlations During Plasma Transitions in the TJ-II Stellarator
Pedrosa, M. A.
Hidalgo, C.
Silva, C.
Carreras, B. A.
Carralero, D.
Calvo, I.
CONTRIBUTIONS TO PLASMA PHYSICS, 2010, 50 (6-7) : 507 - 513
[6] Dynamics of zonal-flow-like structures in the edge of the TJ-II stellarator
Alonso, J. A.
Velasco, J. L.
Arevalo, J.
Hidalgo, C.
Pedrosa, M. A.
Van Milligen, B. Ph
Carralero, D.
Silva, C.
PLASMA PHYSICS AND CONTROLLED FUSION, 2013, 55 (01)
[7] Edge turbulence during limiter biasing experiments in the TJ-II stellarator
Pedrosa, MA
Hidalgo, C
McCarthy, KJ
López-Sánchez, A
Ochando, MA
Pastor, I
Baciero, A
Calderón, E
Estrada, T
Herranz, J
López-Razola, J
Milligen, BV
Tafalla, D
Tabarés, F
Dreval, N
Chmyga, A
Khrebtov, SM
Komarov, AD
Kozachok, S
Krupnik, L
Eliseev, L
Melnikov, AV
CZECHOSLOVAK JOURNAL OF PHYSICS, 2003, 53 (10) : 877 - 885
[8] On the link between parallel flows, turbulence and electric fields in the edge of the TJ-II stellarator
Alonso, J. A.
Hidalgo, C.
Pedrosa, M. A.
De Pablos, J. L.
EPL, 2009, 85 (02)
[9] Role of isotope mass and evidence of fluctuating zonal flows during the L-H transition in the TJ-II stellarator
Losada, U.
Estrada, T.
Liu, B.
van Milligen, B.
Cheng, J.
Silva, C.
Pastor, I
Fontdecaba, J. M.
Hidalgo, C.
PLASMA PHYSICS AND CONTROLLED FUSION, 2018, 60 (07)
[10] The impact of edge radial electric fields on edge-scrape-off layer coupling in the TJ-II stellarator
Grenfell, G.
van Milligen, B. Ph
Losada, U.
Estrada, T.
Liu, B.
Silva, C.
Spolaore, M.
Hidalgo, C.
NUCLEAR FUSION, 2020, 60 (01)

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