Title :
Coaxial helicity injection current drive in the Helicity Injection Tokamak (HIT)
Author :
Nelson, B.A. ; Jarboe, T.R. ; Jones, O. ; Martin, A.K. ; McCullough, L. ; Orvis, D.J. ; Painter, C.L. ; Rogers, J.A. ; Xie, J.P. ; Zhang, C.X. ; Zhou, L.Y.
Author_Institution :
Washington Univ., Seattle, WA, USA
Abstract :
Summary form only given. The prototype Helicity Injected Tokamak (proto-HIT) experiment (R=0.35 m, a=0.25 m, annular thin-walled flux conserver) formed and sustained 30 kA of plasma current solely by coaxial helicity injection. The helicity injector behavior agrees with a force balance model. Surface conditioning by titanium gettering increases the toroidal current and the injector impedance, in agreement with helicity balance. The HIT uses a shaped (R=0.3 m, a=0.2 m, with B/sub o/=0.67 T) thick-walled flux conserver to better confine the configuration.
Keywords :
plasma toroidal confinement; HIT; Helicity Injection Tokamak; coaxial helicity injection; current 30 kA; force balance model; injection current drive; injector impedance; plasma current; proto-HIT; surface conditioning; thick-walled flux conserver; Coaxial components; Coils; Electron beams; Inductors; Magnetic flux; Magnetosphere; Plasma measurements; Steady-state; Tokamaks; Toroidal magnetic fields;
Conference_Titel :
Plasma Science, 1993. IEEE Conference Record - Abstracts., 1993 IEEE International Conference on
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-1360-7
DOI :
10.1109/PLASMA.1993.593091
