Hybrid H-mode scenario with nitrogen seeding and type III ELMs in JET

被引：12

作者：

Corre, Y. ^{[1
]}

Joffrin, E. ^{[1
]}

Monier-Garbet, P. ^{[1
]}

Andrew, Y. ^{[2
]}

Arnoux, G. ^{[1
]}

Beurskens, M. ^{[2
]}

Brezinsek, S. ^{[3
]}

Brix, M. ^{[2
]}

Buttery, R. ^{[2
]}

Coffey, I. ^{[4
]}

Crombe, K. ^{[5
]}

de La Luna, E.

Felton, R. ^{[2
]}

Giroud, C. ^{[2
]}

Hacquin, S. ^{[1
]}

Hobirk, J. ^{[6
]}

Huber, A. ^{[3
]}

Imbeaux, F. ^{[1
]}

Jachmich, S. ^{[7
]}

Kempenaars, M. ^{[2
]}

Litaudon, X. ^{[1
]}

Leggate, H. ^{[2
]}

Loarer, T. ^{[1
]}

Maddison, G. ^{[2
]}

Rachlew, E. ^{[8
]}

Rapp, J. ^{[3
,9
]}

Sauter, O. ^{[10
]}

Savchkov, A. ^{[2
]}

Telesca, G. ^{[3
]}

Widdowson, A. ^{[3
]}

Zastrow, K. D. ^{[2
]}

Zimmermann, O. ^{[3
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

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

[3] Forschungszentrum Julich, Assoc EURATOM FZJ,Trilateral Euregio Cluster, Inst Energieforsch Plasmaphy, Julich, Germany

[4] Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland

[5] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

[6] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

[7] Assoc EURATOM Belgian State, KMS ERM, B-1000 Brussels, Belgium

[8] KTH Royal Inst Technol, Assoc EURATOM VR, SE-10691 Stockholm, Sweden

[9] EURATOM, FOM, Inst Plasmafys Rijnhuizen, Trilateral Euregio Cluster, Nieuwegein, Netherlands

[10] Ecole Polytech Fed Lausanne, CRPP, Assoc Euratom Confederat Suisse, CH-1015 Lausanne, Switzerland

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2008年 / 50卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/0741-3335/50/11/115012

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 performance of the 'hybrid' H-mode regime (long pulse operation with high neutron fluency) has been extensively investigated in JET during the 2005-2007 experimental campaign up to normalized pressure beta(N) = 3, toroidal magnetic field B-t = 1.7T, with type I ELMs plasma edge conditions. The optimized external current drive sources, self-generated non-inductive bootstrap current and plasma core stability properties provide a good prospect of achieving a high fusion gain at reduced plasma current for long durations in ITER. One of the remaining issues is the erosion of the divertor target plates associated with the type I ELM regime. A possible solution could be to operate with a plasma edge in the type III ELM regime (reduced transient and stationary heat loads) obtained with impurity seeding. An integrated hybrid type III ELM regime with a normalized pressure beta(N) = 2.6 (PNBI similar to 20-22 MW) and a thermal confinement factor of H-98* 98(y, 2) similar to 0.83 has been recently successfully developed on JET with nitrogen seeding. This scenario shows good plasma edge condition (compatible with the future ITER-like wall on JET) and moderate MHD activity. In this paper, we report on the experimental development of the scenario (with plasma current I-p = 1.7MA and magnetic field B-t = 1.7T) and the trade-off between heat load reduction at the target plates and global confinement due to nitrogen seeding and type III ELM working conditions.

引用

页数：20

共 42 条

[1] Improved charge exchange spectroscopy on the Joint European Torus for ion temperature and rotation velocity profiles
Andrew, Yasmin
Hawkes, N. C.
Crombe, K.
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2006, 77 (10)
[2] ARNOUX G, 2008, 18 PSI C TOL SPAIN
[3] Simulations of steady-state scenarios for Tore Supra using the CRONOS code
Basiuk, V
Artaud, JF
Imbeaux, F
Litaudon, X
Bécoulet, A
Eriksson, LG
Hoang, GT
Huysmans, G
Mazon, D
Moreau, D
Peysson, Y
[J]. NUCLEAR FUSION, 2003, 43 (09) : 822 - 830
[4] Pedestal and ELM response to impurity seeding in JET advanced scenario plasmas
Beurskens, M. N. A.
Arnoux, G.
Brezinsek, A. S.
Challis, C. D.
de Vries, P. C.
Giroud, C.
Huber, A.
Jachmich, S.
McCormick, K.
Pitts, R. A.
Rimini, F. G.
Alfier, A.
de la Luna, E.
Fundamenski, W.
Gerasimov, S.
Giovannozzi, E.
Joffrin, E.
Kempenaars, M.
Litaudon, X.
Loarer, T.
Lomas, P.
Mailloux, J.
Pasqualotto, R.
Pericoli-Ridolfini, V.
Pugno, R.
Rachlew, E.
Saarelma, S.
Solano, E.
Walsh, M.
Zabeo, L.
Zastrow, K. -D.
[J]. NUCLEAR FUSION, 2008, 48 (09)
[5] Stability analysis of improved confinement discharges: internal transport barriers in Tore Supra and radiative improved mode in TEXTOR
Bourdelle, C
Garbet, X
Hoang, GT
Ongena, J
Budny, RV
[J]. NUCLEAR FUSION, 2002, 42 (07) : 892 - 902
[6] Identification of molecular carbon sources in the JET divertor by means of emission spectroscopy
Brezinsek, S
Pospieszczyk, A
Stamp, MF
Meigs, A
Kirschner, A
Huber, A
Mertens, P
[J]. JOURNAL OF NUCLEAR MATERIALS, 2005, 337 (1-3) : 1058 - 1063
[7] BREZINSEK S, 2005, 32 EPS C TARR SPAIN
[8] CARRARO L, 2007, 34 EPS C WARS POL
[9] GLOBAL ENERGY CONFINEMENT DEGRADATION DUE TO MACROSCOPIC PHENOMENA IN TOKAMAKS
CHANG, Z
CALLEN, JD
[J]. NUCLEAR FUSION, 1990, 30 (02) : 219 - 233
[10] Interpretation of density limits and the H-mode operational diagram through similarity parameters for edge transport mechanisms
Chankin, AV
Saibene, G
[J]. PLASMA PHYSICS AND CONTROLLED FUSION, 1999, 41 (07) : 913 - 930

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