ENERGY CONFINEMENT AND PLASMA HEATING DURING LOWER HYBRID EXPERIMENTS IN FT
RF power up to 450 kW has been injected into the plasma of FT in the electron heating regime (n-e <or= 5 X 10**13 cm**-3) producing electron and ion temperature increases of about 1 keV and .5 keV respectively without significant enhancement of Z-eff. A density increase is observed due to an improvement of particle confinement time. An energy balance at intermediate power level (P-RF=300 kW) is carried out for two different types of discharges, one without sawteeth the other with sawteeth. The balance shows that in order to account for the total injected power one has to assume equal electron thermal conductivity for the OH and the OH>f5<&<RF phase. The energy confinement time does not vary from its ohmic value for both discharges. Finally an investigation, at n-e above the density limit, of the radial source of the fast ion tails and of the characteristics of the Parametric Decay Instability is presented.
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 PP. 1- 14 WRITE TO SERVIZIO STUDI E DOCUMENTAZIONE - ENEA, CENTRO RICERCHE ENERGIA FRASCATI, C.P. 65 - 00044 FRASCATI, ROMA (ITALY), MENTIONING REPORT RT
Record Number: 1989125044600 / Last updated on: 1987-07-01
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