PPPL-3827 is available in <a href="PPPL-3827.pdf">pdf</a> format (1.9 MB).

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<b>Energetic Ion Behavior in the National Spherical Torus Experiment</b>
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<b>Authors:</b> S.S. Medley, R.E. Bell, E.D. Fredrickson, and A.L. Roquemore 
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<b>Date of PPPL Report:</b> June 2003
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<b>To be presented:</b> at the 30th European Physical Society (EPS) Conference on Controlled Fusion and Plasma Physics in St. Petersburg, Russia, 7-11 July 2003.
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The National Spherical Torus Experiment (NSTX) is a low aspect ratio (R/a approximately equal to 1.3) device with auxiliary heating from neutral beam injection (NBI) and high harmonic fast wave (HHFW) heating. Typical NSTX parameters are R<sub>0</sub> = 85 cm, a = 67 cm, I<sub>p</sub> less than or equal to 1.5 MA, B<sub>T</sub> = 0.3-0.6 T. Three co-directed deuterium neutral beam sources have injected P<sub>NB </sub> less than or equal to 6.2 MW at energies E<sub>b</sub> less than or equal to 100 keV. HHFW heating has delivered up to P<sub>RF</sub> approximately equal to 6 MW to deuterium and helium plasmas.

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