Overview of recent physics results from the national spherical torus experiment (NSTX)

被引：39

作者：

Menard, J. E.

Bell, M. G.

Bell, R. E.

Bernabei, S.

Bialek, J.

Biewer, T.

Blanchard, W.

Boedo, J.

Bush, C. E.

Carter, M. D.

Choe, W.

Crocker, N. A.

Darrow, D. S.

Davis, W.

Delgado-Aparicio, L.

Diem, S.

Domier, C. W.

D'Ippolito, D. A.

Ferron, J.

Field, A.

Foley, J.

Fredrickson, E. D.

Gates, D. A.

Gibney, T.

Harvey, R.

Hatcher, R. E.

Heidbrink, W.

Hill, K. W.

Hosea, J. C.

Jarboe, T. R.

Johnson, D. W.

Kaita, R.

Kaye, S. M.

Kessel, C. E.

Kubota, S.

Kugel, H. W.

Lawson, J.

LeBlanc, B. P.

Lee, K. C.

Levinton, F. M.

Luhmann, N. C., Jr.

Maingi, R.

Majeski, R. P.

Manickam, J.

Mansfield, D. K.

Maqueda, R.

Marsala, R.

Mastrovito, D.

Mau, T. K.

Mazzucato', E.

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Columbia Univ, Dept Appl Phys, New York, NY 10027 USA

[3] Univ Calif San Diego, San Diego, CA 92103 USA

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

[5] Korea Adv Inst Sci & Technol, Taejon 305701, South Korea

[6] Univ Calif Los Angeles, Los Angeles, CA USA

[7] Johns Hopkins Univ, Baltimore, MD USA

[8] Univ Calif Davis, Davis, CA 95616 USA

[9] Lodestar Res Corp, Boulder, CO USA

[10] Gen Atom Co, San Diego, CA USA

[11] UKAEA Euratom Fus Assoc, Culham Lab, Abingdon OX14 3DB, Oxon, England

[12] Comp X, Del Mar, CA USA

[13] Univ Calif Irvine, Irvine, CA USA

[14] Univ Washington, Seattle, WA 98195 USA

[15] Nova Photon, Princeton, NJ USA

[16] Univ Colorado, Boulder, CO 80309 USA

[17] Hiroshima Univ, Hiroshima, Japan

[18] MIT, Cambridge, MA 02139 USA

[19] Lawrence Livermore Natl Lab, Livermore, CA USA

[20] Univ Tokyo, Tokyo, Japan

[21] Univ Rochester, Rochester, NY USA

[22] CEA, Cadarache, France

[23] NYU, New York, NY USA

[24] Los Alamos Natl Lab, Los Alamos, NM USA

[25] Princeton Sci Instruments, Princeton, NJ USA

[26] ENEA, Frascati, Italy

[27] Kurchatov Inst, Moscow, Russia

[28] Univ Wisconsin, Madison, WI USA

[29] JAERI, Naka, Ibaraki, Japan

[30] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

NUCLEAR FUSION | 2007年 / 47卷 / 10期

关键词：

D O I：

10.1088/0029-5515/47/10/S13

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 National Spherical Torus Experiment (NSTX) has made considerable progress in advancing the scientific understanding of high performance long-pulse plasmas needed for future spherical torus (ST) devices and ITER. Plasma durations up to 1.6 s (five current redistribution times) have been achieved at plasma currents of 0.7 MA with non-inductive current fractions above 65% while simultaneously achieving beta(T) and beta(N) values of 17% and 5.7 (%m T MA(-1)), respectively. A newly available motional Stark effect diagnostic has enabled validation of current-drive sources and improved the understanding of NSTX 'hybrid'-like scenarios. In MHD research, ex-vessel radial field coils have been utilized to infer and correct intrinsic EFs, provide rotation control and actively stabilize the n = 1 resistive wall mode at ITER-relevant low plasma rotation values. In transport and turbulence research, the low aspect ratio and a wide range of achievable in the NSTX provide unique data for confinement scaling studies, and a new microwave scattering diagnostic is being used to investigate turbulent density fluctuations with wavenumbers extending from ion to electron gyro-scales. In energetic particle research, cyclic neutron rate drops have been associated with the destabilization of multiple large toroidal Alfven eigenmodes (TAEs) analogous to the 'sea-of-TAE' modes predicted for ITER, and three-wave coupling processes have been observed for the first time. In boundary physics research, advanced shape control has enabled studies of the role of magnetic balance in H-mode access and edge localized mode stability. Peak divertor heat flux has been reduced by a factor of 5 using an H-mode-compatible radiative divertor, and lithium conditioning has demonstrated particle pumping and results in improved thermal confinement. Finally, non-solenoidal plasma start-up experiments have achieved plasma currents of 160 kA on closed magnetic flux surfaces utilizing coaxial helicity injection.

引用

页码：S645 / S657

页数：13

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