Plasma Shape Control on the National Spherical Torus Experiment (NSTX) using Real-time Equilibrium Reconstruction

Gates, D.A. ; Ferron, J.R. ; Bell, M. ; Gibney, T. ; Johnson, R. ; Marsala, R.J. ; Mastrovito, D. ; Menard, J.E. ; Mueller, D. ; Penaflor, B. ; Sabbagh, S.A. ; Stevenson, T.

Princeton University. Plasma Physics Laboratory.

关键词: Feedback;    70 Plasma Physics And Fusion Technology;    Spherical Torus;    Doublet-3 Device;    Control Systems;   

DOI  :  10.2172/839126
RP-ID  :  PPPL-4063
RP-ID  :  AC02-76CH03073
RP-ID  :  839126

美国|英语

来源: UNT Digital Library

【 摘 要 】

Plasma shape control using real-time equilibrium reconstruction has been implemented on the National Spherical Torus Experiment (NSTX). The rtEFIT code originally developed for use on DIII-D was adapted for use on NSTX. The real-time equilibria provide calculations of the flux at points on the plasma boundary, which is used as input to a shape control algorithm known as isoflux control. The flux at the desired boundary location is compared to a reference flux value, and this flux error is used as the basic feedback quantity for the poloidal-field coils on NSTX. The hardware that comprises the control system is described, as well as the software infrastructure. Examples of precise boundary control are also presented.