Investigation of the second harmonic electron cyclotron current drive efficiency on the T‐10 tokamak

Experiments on second harmonic electron cyclotron current drive were done on the T‐10 tokamak using four gyrotrons. Total powers up to 1.2 MW at a frequency of 140 GHz were injected. Current generation by electron cyclotron (EC) waves was demonstrated in the experiments. The efficiency η of current...

Full description

Saved in:
Bibliographic Details
Published in:Physics of plasmas 1994-05, Vol.1 (5), p.1554-1559
Main Authors: Razumova, K. A., Alikaev, V. V., Dremin, M. M., Esipchuk, Yu. V., Kislov, A. Ya, Notkin, G. E., Pavlov, Yu. D., Forest, C. B., Lohr, John, Luce, T. C., Harvey, R. W.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350 - Plasma Production, Heating, Current Drive, & Interactions- (1992-)
CLOSED PLASMA DEVICES
CURRENT DENSITY
CURRENT-DRIVE HEATING
CYCLOTRON HARMONICS
CYCLOTRON RESONANCE
DIFFERENTIAL EQUATIONS
EFFICIENCY
ELECTRIC HEATING
ELECTRON CYCLOTRON-RESONANCE
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUATIONS
FOKKER-PLANCK EQUATION
HARMONICS
HEATING
JOULE HEATING
MICROWAVE EQUIPMENT
MICROWAVE TUBES
OSCILLATIONS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA HEATING
RESISTANCE HEATING
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Experiments on second harmonic electron cyclotron current drive were done on the T‐10 tokamak using four gyrotrons. Total powers up to 1.2 MW at a frequency of 140 GHz were injected. Current generation by electron cyclotron (EC) waves was demonstrated in the experiments. The efficiency η of current generation and its dependence on plasma parameters were measured and it was shown that the efficiency is a nonlinear function of input power, more closely predicted by Fokker–Planck calculations than by linear theory. The interaction of EC waves with the tail of the electron distribution was shown to be important. It was also found that current density profile redistribution played an important role in the plasma behavior.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.870706