Transport in Auxiliary Heated NSTX Discharges

LeBlanc, B.P. ; Bell, M.G. ; Bell, R.E. ; Bitte, M.L. ; Bourdelle, C. ; Gates, D.A. ; Kaye, S.M. ; Maingi, R. ; Menard, J.E. ; Mueller, D. ; Ono, M. ; Paul, S.F. ; Redi, M.H. ; Roquemore, A.L. ; Rosenberg, A. ; Sabbagh, S.A. ; Stutman, D. ; Synakowski, E.J. ; Soukhanovskii, V.A. ; J.R.Wilson

Princeton University. Plasma Physics Laboratory.

关键词: Nstx;    Transport Neutral Beams;    Neutral Beams;    70 Plasma Physics And Fusion Technology;    Transport Coefficients;   

DOI  :  10.2172/814704
RP-ID  :  PPPL-3837
RP-ID  :  AC02-76CH03073
RP-ID  :  814704

美国|英语

来源: UNT Digital Library

【 摘 要 】

The NSTX spherical torus (ST) provides a unique platform to investigate magnetic confinement in auxiliary-heated plasmas at low aspect ratio. Auxiliary power is routinely coupled to ohmically heated plasmas by deuterium neutral-beam injection (NBI) and by high-harmonic fast waves (HHFW) launch. While theory predicts both techniques to preferentially heat electrons, experiment reveals the electron temperature is greater than the ion temperature during HHFW, but the electron temperature is less than the ion temperature during NBI. In the following we present the experimental data and the results of transport analyses.