Impurity transport in internal transport barrier discharges on JET

被引：65

作者：

Dux, R ^{[1
]}

Giroud, C

Zastrow, KD

机构：

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

[2] Trilateral Euregio Cluster, Ass EURATOM FOM, FOM Rijnhuizen, Nieuwegein, Netherlands

[3] Fus Assoc, EURATOM UKAEA, Culham, England

来源：

NUCLEAR FUSION | 2004年 / 44卷 / 02期

关键词：

D O I：

10.1088/0029-5515/44/2/006

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：

Impurity behaviour in JET internal transport barrier (ITB) discharges with reversed shear has been investigated. Metallic impurities accumulate in cases with too strong peaking of the main ion density profile. The accumulation is due to inwardly directed drift velocities inside the ITB radius. The strength of the impurity peaking increases with the impurity charge and is low for the low-Z elements C and Ne. Transport calculations show that the observed behaviour is consistent with dominant neoclassical impurity transport inside the ITB. In some cases, MHD events in the core flatten the radial profile of the metallic impurity.

引用

页码：260 / 264

页数：5

共 23 条

[1]

Alper B, 1996, P 23 EPS C CONTR FUS, V20C, P163

[2] Microturbulence and flow shear in high-performance JET ITB plasma [J].

Budny, RV ;

Andre, R ;

Bécoulet, A ;

Challis, CD ;

Conway, GD ;

Dorland, W ;

Ernst, DR ;

Hahm, TS ;

Hender, TC ;

McCune, D ;

Rewoldt, G ;

Sharapov, SE .

PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (07) :1215-1228

[3] 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

[4] Impurity transport with strong and weak internal thermal barriers in JET optimized shear plasmas [J].

Chen, H ;

Hawkes, NC ;

Ingesson, LC ;

Peacock, NJ ;

Haines, MG .

NUCLEAR FUSION, 2001, 41 (01) :31-46

[5] JET quasistationary internal-transport-barrier operation with active control of the pressure profile -: art. no. 145004 [J].

Crisanti, F ;

Litaudon, X ;

Mailloux, J ;

Mazon, D ;

Barbato, E ;

Baranov, Y ;

Bécoulet, A ;

Bécoulet, M ;

Challis, CD ;

Conway, GD ;

Dux, R ;

Eriksson, LG ;

Esposito, B ;

Frigione, D ;

Hennequin, P ;

Giroud, C ;

Hawkes, N ;

Huysmans, G ;

Imbeaux, F ;

Joffrin, E ;

Lomas, P ;

Lotte, P ;

Maget, P ;

Mantsinen, M ;

Moreau, D ;

Rimini, F ;

Riva, M ;

Sarazin, Y ;

Tresset, G ;

Tuccillo, AA ;

Zastrow, KD .

PHYSICAL REVIEW LETTERS, 2002, 88 (14) :145004/1-145004/4

[6] Z dependence of the core impurity transport in ASDEX Upgrade H mode discharges [J].

Dux, R ;

Peeters, AG ;

Gude, A ;

Kallenbach, A ;

Neu, R .

NUCLEAR FUSION, 1999, 39 (11) :1509-1522

[7] Neoclassical impurity transport in the core of an ignited tokamak plasma [J].

Dux, R ;

Peeters, AG .

NUCLEAR FUSION, 2000, 40 (10) :1721-1729

[8] Accumulation of impurities in advanced scenarios [J].

Dux, R ;

Giroud, C ;

Neu, R ;

Peeters, AG ;

Stober, J ;

Zastrow, KD .

JOURNAL OF NUCLEAR MATERIALS, 2003, 313 :1150-1155

[9]

DUX R, 2001, 28 C CONTR FUS PLASM

[10] Observation of neoclassical transport in reverse shear plasmas on TFTR [J].

Efthimion, PC ;

Von Goeler, S ;

Houlberg, WA ;

Synakowski, EJ ;

Zarnstorff, MC ;

Batha, SH ;

Bell, RE ;

Bitter, M ;

Bush, CE ;

Levinton, FM ;

Mazzucato, E ;

McCune, DC ;

Mueller, D ;

Park, HK ;

Ramsey, AT ;

Roquemore, AL ;

Taylor, G .

NUCLEAR FUSION, 1999, 39 (11Y) :1905-1909

← 1 2 3 →