Overview of physics results from MAST

被引：25

作者：

Lloyd, B. ^{[1
]}

Akers, R. J. ^{[1
]}

Alladio, F. ^{[2
]}

Allan, S. ^{[1
]}

Appel, L. C. ^{[1
]}

Barnes, M. ^{[1
,3
]}

Barratt, N. C. ^{[4
]}

Ben Ayed, N. ^{[1
]}

Breizman, B. N. ^{[5
]}

Cecconello, M. ^{[6
]}

Challis, C. D. ^{[1
]}

Chapman, I. T. ^{[1
]}

Ciric, D. ^{[1
]}

Colyer, G. ^{[1
]}

Connor, J. W. ^{[1
]}

Conway, N. J. ^{[1
]}

Cox, M. ^{[1
]}

Cowley, S. C. ^{[1
]}

Cunningham, G. ^{[1
]}

Darke, A. ^{[1
]}

De Bock, M. ^{[1
]}

Delchambre, E. ^{[7
]}

De Temmerman, G. ^{[1
]}

Dendy, R. O. ^{[1
]}

Denner, P. ^{[4
]}

Driscoll, M. D. ^{[1
]}

Dudson, B. ^{[4
]}

Dunai, D. ^{[8
]}

Dunstan, M. ^{[1
]}

Elmore, S. ^{[9
]}

Field, A. R. ^{[1
]}

Fishpool, G. ^{[1
]}

Freethy, S. ^{[4
]}

Garzotti, L. ^{[1
]}

Gibson, K. J. ^{[4
]}

Gryaznevich, M. P. ^{[1
]}

Guttenfelder, W. ^{[10
]}

Harrison, J. ^{[1
,4
]}

Hastie, R. J. ^{[1
]}

Hawkes, N. C. ^{[1
]}

Hender, T. C. ^{[1
]}

Hnat, B. ^{[10
]}

Howell, D. F. ^{[1
]}

Hua, M. -D. ^{[11
]}

Hubbard, A. ^{[12
]}

Huysmans, G. ^{[7
]}

Keeling, D. ^{[1
]}

Kim, Y. C. ^{[3
]}

Kirk, A. ^{[1
]}

Liang, Y. ^{[13
]}

机构：

[1] EURATOM CCFE Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England

[2] Assoc EURATOM ENEA Fus, Rome, Italy

[3] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford, England

[4] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[5] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA

[6] Uppsala Univ, EURATOM VR Assoc, SE-75120 Uppsala, Sweden

[7] Assoc Euratom CEA, CEA Cadarache, F-13108 St Paul Les Durance, France

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

[9] Univ Liverpool, Dept Elect Engn & Elect, Liverpool L69 3BX, Merseyside, England

[10] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England

[11] Univ London Imperial Coll Sci Technol & Med, London, England

[12] MIT Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[13] Assoc EURATOM FZ Julich, D-52425 Julich, Germany

[14] Chalmers Univ Technol, S-41296 Gothenburg, Sweden

[15] Oak Ridge Natl Lab, Oak Ridge, TN USA

[16] Univ Calif San Diego, La Jolla, CA 92093 USA

[17] Comenius Univ, EURATOM Assoc, Fac Math Phys & Informat, Bratislava 81806, Slovakia

[18] St Petersburg State Polytech Univ, St Petersburg, Russia

[19] Columbia Univ, Dept Appl Phys & Appl Maths, New York, NY USA

[20] AF Ioffe Phys Tech Inst, St Petersburg, Russia

[21] EURATOM, Max Planck Inst Plasmaphys, Garching, Germany

来源：

NUCLEAR FUSION | 2011年 / 51卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

TRANSPORT;

D O I：

10.1088/0029-5515/51/9/094013

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：

Major developments on the Mega Amp Spherical Tokamak (MAST) have enabled important advances in support of ITER and the physics basis of a spherical tokamak (ST) based component test facility (CTF), as well as providing new insight into underlying tokamak physics. For example, L-H transition studies benefit from high spatial and temporal resolution measurements of pedestal profile evolution (temperature, density and radial electric field) and in support of pedestal stability studies the edge current density profile has been inferred from motional Stark effect measurements. The influence of the q-profile and E x B flow shear on transport has been studied in MAST and equilibrium flow shear has been included in gyro-kinetic codes, improving comparisons with the experimental data. H-modes exhibit a weaker q and stronger collisionality dependence of heat diffusivity than implied by IPB98(gamma, 2) scaling, which may have important implications for the design of an ST-based CTF. ELM mitigation, an important issue for ITER, has been demonstrated by applying resonant magnetic perturbations (RMPs) using both internal and external coils, but full stabilization of type-I ELMs has not been observed. Modelling shows the importance of including the plasma response to the RMP fields. MAST plasmas with q > 1 and weak central magnetic shear regularly exhibit a long-lived saturated ideal internal mode. Measured plasma braking in the presence of this mode compares well with neo-classical toroidal viscosity theory. In support of basic physics understanding, high resolution Thomson scattering measurements are providing new insight into sawtooth crash dynamics and neo-classical tearing mode critical island widths. Retarding field analyser measurements show elevated ion temperatures in the scrape-off layer of L-mode plasmas and, in the presence of type-I ELMs, ions with energy greater than 500 eV are detected 20 cm outside the separatrix. Disruption mitigation by massive gas injection has reduced divertor heat loads by up to 70%.

引用

页数：10

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