A Lower Hybrid Current Drive System for Alcator C-Mod

Bernabei, S. ; Hosea, J.C. ; Loesser, D. ; Rushinski, J. ; Wilson, J.R. ; Bonoli, P. ; Grimes, M. ; Parker, R. ; Porkolab, M. ; Terry, D. ; Woskov, P.

Princeton University. Plasma Physics Laboratory.

关键词: Breakdown;    Feedback;    Stabilization;    70 Plasma Physics And Fusion Technology;    Lower Hybrid Current Drive;   

DOI  :  10.2172/781841
RP-ID  :  PPPL-3559
RP-ID  :  AC02-76CH03073
RP-ID  :  781841

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来源: UNT Digital Library

【 摘 要 】

A Lower Hybrid Current Drive system is being constructed jointly by Plasma Science and Fusion Center (PSFC) and Princeton Plasma Physics Laboratory (PPPL) for installation on the Alcator C-Mod tokamak, with the primary goal of driving plasma current in the outer region of the plasma. The Lower Hybrid (LH) system consists of 3 MW power at 4.6 GHz with a maximum pulse length of 5 seconds. Twelve klystrons will feed an array of 4-vertical and 24-horizontal waveguides mounted in one equatorial port. The coupler will incorporate some compact characteristics of the multijunction power splitting while retaining full control of the toroidal phase. In addition a dynamic phase control system will allow feedback stabilization of MHD modes. The desire to avoid possible waveguide breakdown and the need for compactness have resulted in some innovative technical solution which will be presented.