PPPL-3591 is available in <a href="PPPL-3591.pdf">pdf</a> or 
<a href="PPPL-3591.ps">postscript</a> formats.

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<b>Kinetic Profiles in NSTX Plasmas</b>
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<b>Authors:</b> R.E. Bell, B.P. LeBlanc, C. Bourdelle, D.R. Ernst, E.D. Fredrickson, D.A. Gates, J.C. Hosea, D.W. Johnson, S.M. Kaye, R. Maingi, S. Medley, J.E. Menard, D. Mueller, M. Ono, F. Paoletti, M. Peng, S.A. Sabbagh, D. Stutman, D.W. Swain, E.J. Synakowski, and J.R. Wilson</p>

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<b>Date of PPPL Report:</b> July 2001 
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<b>Submitted to:</b> the 28th European Physical Society Conference on Controlled Fusion and Plasma Physics held in Madeira, Portugal, June 18-22, 2001.</p>

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The National Spherical Torus Experiment (NSTX) is a low aspect ratio (R/a<FONT FACE = "symbol"> ~</FONT FACE = "Symbol"> 1.3) device with auxiliary heating from neutral beam injection (NBI) and high harmonic fast wave heating (HHFW). Typical NSTX parameters are R<sub>O</sub>= 85 cm, a = 67 cm, I<sub>p</sub> = 0.7-1.4 MA, B<sub><FONT FACE = "symbol">f</FONT FACE = "symbol"></sub> = 0.25-0.45 T. Three co-directed deuterium neutral beam sources have injected P<sub>NB</sub> less than or equal to 4.7 MW. HHFW plasmas typically have delivered P<sub>RF</sub> is 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, T<sub>i</sub>, and toroidal flow, V<sub><FONT FACE = "symbol">f</FONT FACE = "symbol"></sub>, at 17 radial positions spanning the outer half of the minor radius with 20 ms 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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