Kinetic Profiles in NSTX Plasmas | Zendy

R. E. Bell | Zendy; B.P. LeBlanc | Zendy; C. Bourdelle | Zendy; D. R. Ernst | Zendy; E. Fredrickson | Zendy; D. Gates | Zendy; J. Hosea | Zendy; D.W. Johnson | Zendy; S. Kaye | Zendy; R. Maingi | Zendy; S. S. Medley | Zendy; J. Ménard | Zendy; D. Mueller | Zendy; M. Ono | Zendy; F. Paoletti | Zendy; Y.K.M. Peng | Zendy; S.A. Sabbagh | Zendy; D. Stutman | Zendy; D. W. Swain | Zendy; E.J. Synakowski | Zendy; and J.R. Wilson | Zendy

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Kinetic Profiles in NSTX Plasmas

Author(s) -

R. E. Bell,

B.P. LeBlanc,

C. Bourdelle,

D. R. Ernst,

E. Fredrickson,

D. Gates,

J. Hosea,

D.W. Johnson,

S. Kaye,

R. Maingi,

S. S. Medley,

J. Ménard,

D. Mueller,

M. Ono,

F. Paoletti,

Y.K.M. Peng,

S.A. Sabbagh,

D. Stutman,

D. W. Swain,

E.J. Synakowski,

and J.R. Wilson

Publication year - 2001

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/787778

Subject(s) - thomson scattering , neutral beam injection , atomic physics , electron temperature , plasma , kinetic energy , radius , spectroscopy , ion , toroid , electron , beam (structure) , physics , tokamak , optics , nuclear physics , computer security , quantum mechanics , computer science

The National Spherical Torus Experiment (NSTX) is a low aspect ratio (R/a approximately 1.3) device with auxiliary heating from neutral-beam injection (NBI) and high-harmonic fast-wave heating (HHFW). Typical NSTX parameters are R(subscript ''0'') = 85 cm, a = 67 cm, I(subscript ''p'') = 0.7-1.4 MA, B(subscript ''phi'') = 0.25-0.45 T. Three co-directed deuterium neutral-beam sources have injected P(subscript ''NB'') less than or equal to 4.7 MW. HHFW plasmas typically have delivered P(subscript ''RF'') less than or equal to 3 MW. Important to the understanding of NSTX confinement are the new kinetic profile diagnostics: a multi-pulse Thomson scattering system (MPTS) and a charge-exchange recombination spectroscopy (CHERS) system. The MPTS diagnostic currently measures electron density and temperature profiles at 30 Hz at ten spatial locations. The CHERS system has recently become available to measure carbon ion temperature and toroidal flow at 17 radial positions spanning the outer half of the minor radius with 20 msec time resolution during NBI. Experiments conducted during the last year have produced a wide range of kinetic profiles in NSTX. Some interesting examples are presented below

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