Relationship between MHD events, magnetic resonances and transport barriers in TJ-II plasmas

被引：15
作者：
Lopez-Bruna, D. [1 ]
Ochando, M. A. [1 ]
Lopez-Fraguas, A. [1 ]
Medina, F. [1 ]
Ascasibar, E. [1 ]
机构：
[1] Asociac EURATOM Ciemat, Lab Nacl Fus, Madrid 28040, Spain
来源：
NUCLEAR FUSION | 2013年 / 53卷 / 07期
关键词：
H TRANSITION EXPERIMENTS; ECH PLASMAS; CONFINEMENT; STABILITY; MODE;
D O I：
10.1088/0029-5515/53/7/073051
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：
In the TJ-II stellarator,a medium-sized heliac device that operates at high rotational transform (t = iota/2 pi similar to 3/2) and low magnetic shear, a close relationship is identified between abrupt changes in transport (in the form of radial fluxes, edge or internal transport barriers), broadband magnetohydrodynamic (MHD) events and the location of magnetic resonances. The observations are based on the local behaviour of plasma radiation. Phenomena that appear like sawteeth and crashes in tokamaks are found in practically all kinds of plasmas and show intensities and repetition rates that depend on plasma parameters. The magnetic resonances are suggested as important transport regulators in normal operation.
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页数：11
相关论文
共 50 条
[1]   TJ-II PROJECT - A FLEXIBLE HELIAC STELLARATOR [J].
ALEJALDRE, C ;
GOZALO, JJA ;
PEREZ, JB ;
MAGANA, FC ;
DIAZ, JRC ;
PEREZ, JG ;
LOPEZFRAGUAS, A ;
GARCIA, L ;
KRIVENSKI, VI ;
MARTIN, R ;
NAVARRO, AP ;
PEREA, A ;
RODRIGUEZYUNTA, A ;
AYZA, MS ;
VARIAS, A .
FUSION TECHNOLOGY, 1990, 17 (01) :131-139
[2]   Review of confinement and transport studies in the TJ-II flexible heliac [J].
Alejaldre, C ;
Almoguera, L ;
Alonso, J ;
Ascasíbar, E ;
Baciero, A ;
Balbín, R ;
Blaumoser, M ;
Botija, J ;
Brañas, B ;
de la Cal, E ;
Cappa, A ;
Carrasco, R ;
Castejón, F ;
Castellano, J ;
Cepero, JR ;
Cremy, C ;
Doncel, J ;
Eguilior, S ;
Estrada, T ;
Fernández, A ;
Fuentes, C ;
García, A ;
García-Cortés, I ;
Guasp, J ;
Herranz, J ;
Hidalgo, C ;
Jiménez, JA ;
Kirpitchev, I ;
Krivenski, V ;
Labrador, I ;
Lapayese, F ;
Likin, K ;
Liniers, M ;
López-Fraguas, A ;
López-Sánchez, A ;
de la Luna, E ;
Martín, R ;
Martínez-Laso, L ;
McCarthy, KJ ;
Medina, F ;
Medrano, M ;
Méndez, P ;
van Milligen, B ;
Ochando, M ;
Pacios, L ;
Pastor, I ;
Pedrosa, MA ;
de la Peña, A ;
Portas, A ;
Qin, J .
NUCLEAR FUSION, 2001, 41 (10) :1449-1457
[3]   A study of topological structures in TJ-II radiation profiles using an automated pattern recognition procedure and their correlation with plasma confinement [J].
Baciero, A ;
Zurro, B ;
McCarthy, KJ ;
López-Fraguas, A ;
Ascasíbar, E ;
Estrada, T ;
García-Cortés, I ;
de la Luna, E ;
Vega, J .
PLASMA PHYSICS AND CONTROLLED FUSION, 2001, 43 (08) :1039-1053
[4]   Central electron temperature estimations of TJ-II neutral beam injection heated plasmas based on the soft x ray multi-foil technique [J].
Baiao, D. ;
Medina, F. ;
Ochando, M. ;
McCarthy, K. ;
Tabares, F. ;
Pastor, I. ;
Varandas, C. .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2012, 83 (05)
[5]  
BOOZER AH, 1983, PLASMA PHYS CONTROLL, V3, P129
[6]   Influence of magnetic topology on transport and stability in stellarators [J].
Castejón, F ;
Fujisawa, A ;
Ida, K ;
Talmadge, JN ;
Estrada, T ;
López-Bruna, D ;
Hidalgo, C ;
Krupnik, L ;
Melnikov, A .
PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 :B53-B69
[7]   Influence of low-order rational magnetic surfaces on heat transport in TJ-II heliac ECRH plasmas [J].
Castejón, F ;
López-Bruna, D ;
Estrada, T ;
Ascasíbar, E ;
Zurro, B ;
Baciero, A .
NUCLEAR FUSION, 2004, 44 (05) :593-599
[8]  
Castejon F., 2000, SERIES PLASMA PHYS, V6, P3
[9]   Influence of the q-profile shape on plasma performance in JET [J].
Challis, CD ;
Litaudon, X ;
Tresset, G ;
Baranov, YF ;
Bécoulet, A ;
Giroud, C ;
Hawkes, NC ;
Howell, DF ;
Joffrin, E ;
Lomas, PJ ;
Mailloux, J ;
Mantsinen, MJ ;
Stratton, BC ;
Ward, DJ ;
Zastrow, KD .
PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (07) :1031-1055
[10]  
Coda S., 2012, 24 IAEA FUS EN C SAN
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