Observation of zonal flow-like structures using the autocorrelation-width technique

被引：15

作者：

Bencze, A.

Berta, M.

Zoletnik, S.

Stockel, J.

Adámek, J.

Hron, M.

机构：

[1] EURATOM, KFKI, RMKI, H-1525 Budapest, Hungary

[2] Szechenyi Istvan Univ, EURATOM Assoc, Gyor, Hungary

[3] EURATOM, IPP, Prague, Czech Republic

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2006年 / 48卷 / 04期

关键词：

D O I：

10.1088/0741-3335/48/4/S10

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：

This paper presents the first application of the autocorrelation-width technique (Bencze A and Zoletnik S 2005 Phys. Plasmas 12 052323) to detect and characterize the microturbulence-zonal flow system using fluctuating signals ((phi) over tilde (f), (I) over tilde (s),) measured by arrays of single-tip Langmuir probes in the CASTOR tokamak. Radially localized (1 cm) random flow structures have been clearly observed with a lifetime of approximate to 1 ms and a long-range poloidal correlation, extending over at least one-fourth of the poloidal circumference.

引用

收藏

页码：S137 / S153

页数：17

相关论文

共 23 条

[1] Autocorrelation analysis and statistical consideration for the determination of velocity fluctuations in fusion plasmas [J].

Bencze, A ;

Zoletnik, S .

PHYSICS OF PLASMAS, 2005, 12 (05) :1-10

[2] Signature of turbulent zonal flows observed in the DIII-D tokamak [J].

Coda, S ;

Porkolab, M ;

Burrell, KH .

PHYSICAL REVIEW LETTERS, 2001, 86 (21) :4835-4838

[3] Direct measurement of zonal flows and geodesic acoustic mode oscillations in ASDEX Upgrade using Doppler reflectometry [J].

Conway, GD ;

Scott, B ;

Schirmer, J ;

Reich, M ;

Kendl, A .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (08) :1165-1185

[4] Spatially resolved characterization of electrostatic fluctuations in the scrape-off layer of the CASTOR tokamak [J].

Devynck, P ;

Bonhomme, G ;

Martines, E ;

Stöckel, J ;

Van Oost, G ;

Voitsekhovitch, I ;

Adámek, J ;

Azeroual, A ;

Doveil, F ;

Duran, I ;

Gravier, E ;

Gunn, J ;

Hron, M .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (02) :269-280

[5] Zonal flows in plasma - a review [J].

Diamond, PH ;

Itoh, SI ;

Itoh, K ;

Hahm, TS .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (05) :R35-R161

[6] In search of the elusive zonal flow using cross-bicoherence analysis [J].

Diamond, PH ;

Rosenbluth, MN ;

Sanchez, E ;

Hidalgo, C ;

Van Milligen, B ;

Estrada, T ;

Brañas, B ;

Hirsch, M ;

Hartfuss, HJ ;

Carreras, BA .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4842-4845

[7] Comparisons and physics basis of tokamak transport models and turbulence simulations [J].

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 .

PHYSICS OF PLASMAS, 2000, 7 (03) :969-983

[8] Transport control by coherent zonal flows in the core/edge transitional regime [J].

Hallatschek, K ;

Biskamp, D .

PHYSICAL REVIEW LETTERS, 2001, 86 (07) :1223-1226

[9] DEVELOPMENTS IN THE GYROFLUID APPROACH TO TOKAMAK TURBULENCE SIMULATIONS [J].

HAMMETT, GW ;

BEER, MA ;

DORLAND, W ;

COWLEY, SC ;

SMITH, SA .

PLASMA PHYSICS AND CONTROLLED FUSION, 1993, 35 (08) :973-985

[10] Radial structure of Reynolds stress in the plasma boundary of tokamak plasmas [J].

Hidalgo, C ;

Silva, C ;

Pedrosa, MA ;

Sánchez, E ;

Fernandes, H ;

Varandas, CAF .

PHYSICAL REVIEW LETTERS, 1999, 83 (11) :2203-2205