MHD stability analysis of diagnostic optimized configuration shots in JET

被引：30

作者：

Saarelma, S ^{[1
]}

Parail, V

Andrew, Y

de la Luna, E

Kallenbach, A

Kempenaars, M

Korotkov, A

Loarte, A

Lönnroth, J

Monier-Garbet, P

Stober, J

Suttrop, W

机构：

[1] Aalto Univ, EURATOM, TEKES Assoc, FIN-02015 Helsinki, Finland

[2] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[3] EURATOM, CIEMAT Fus, E-28040 Madrid, Spain

[4] EURATOM, MPI Plasmaphys, D-85748 Garching, Germany

[5] EURATOM, FOM Rijnhuizen, TEC, NL-3430 BE Nieuwegein, Netherlands

[6] CSU, EFDA, Garching, Germany

[7] EURATOM, CEA Cadarache, DRFC, F-13108 St Paul Les Durance, France

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2005年 / 47卷 / 05期

关键词：

D O I：

10.1088/0741-3335/47/5/003

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 plasma edge MHD stability is analysed for several JET discharges in the diagnostic optimized configuration. The stability analysis of Type I ELMy plasmas shows how after an edge localized mode (ELM) crash the plasma edge is deep in the stable region against low- to intermediate-n peeling-ballooning modes. As the pressure gradient steepens and the edge current builds up, the plasma reaches the low- to intermediate-n peeling-ballooning mode stability boundary just before the ELM crash. Increasing the plasma fuelling by gas puffing makes the second stability access against high-n ballooning modes narrower until it closes completely and the ELMs change from Type I to Type III. Reducing the plasma heating has a similar effect. Increasing the safety factor at the plasma edge improves the stability against low- to intermediate-n modes allowing steeper pressure gradients to develop before an ELM crash.

引用

页码：713 / 731

页数：19

共 23 条

[1]

BARTLETT DV, 1992, 8 JOINT WORKSH EL CY

[2]

CENNACHI G, 1998, JETIR8803

[3] Magnetohydrodynamic stability of tokamak edge plasmas [J].

Connor, JW ;

Hastie, RJ ;

Wilson, HR ;

Miller, RL .

PHYSICS OF PLASMAS, 1998, 5 (07) :2687-2700

[4]

GOWERS C, 2000, J PLASMA FUSION RES, V76, P874

[5]

Huysmans G. T. A., 1991, COMPUTATIONAL PHYSIC, P371

[6] EDGE2D modelling of edge profiles obtained in JET diagnostic optimized configuration [J].

Kallenbach, A ;

Andrew, Y ;

Beurskens, M ;

Corrigan, G ;

Eich, T ;

Jachmich, S ;

Kempenaars, M ;

Korotkov, A ;

Loarte, A ;

Matthews, G ;

Monier-Garbet, P ;

Saibene, G ;

Spence, J ;

Suttrop, W .

PLASMA PHYSICS AND CONTROLLED FUSION, 2004, 46 (03) :431-446

[7]

KEMPENAARS M, 2003, 30 EPS C CONTR FUS A, V27

[8] RECONSTRUCTION OF CURRENT PROFILE PARAMETERS AND PLASMA SHAPES IN TOKAMAKS [J].

LAO, LL ;

STJOHN, H ;

STAMBAUGH, RD ;

KELLMAN, AG ;

PFEIFFER, W .

NUCLEAR FUSION, 1985, 25 (11) :1611-1622

[9] Dependence of edge stability on plasma shape and local pressure gradients in the DIII-D and JT-60U tokamaks [J].

Lao, LL ;

Kamada, Y ;

Oikawa, T ;

Baylor, LR ;

Burrell, KH ;

Chan, VS ;

Chance, MS ;

Chu, MS ;

Ferron, JR ;

Fukuda, T ;

Hatae, T ;

Isayama, A ;

Jackson, GJ ;

Leonard, AW ;

Makowski, MA ;

Manickam, J ;

Murakami, M ;

Okabayashi, M ;

Osborne, TH ;

Snyder, PB ;

Strait, EJ ;

Takeji, S ;

Takizuka, T ;

Taylor, TS ;

Turnbull, AD ;

Tsuchiya, K ;

Wade, MR .

NUCLEAR FUSION, 2001, 41 (03) :295-300

[10] The impact of ELMs on the ITER divertor [J].

Leonard, AW ;

Herrmann, A ;

Itami, K ;

Lingertat, J ;

Loarte, A ;

Osborne, TH ;

Suttrop, W .

JOURNAL OF NUCLEAR MATERIALS, 1999, 266 :109-117

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