High power Ion Cyclotron Resonance Heating (ICRH) in JET

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7080545

Jacquinot, J

Ion Cyclotron Resonance Heating (ICRH) powers of up to 17 MW have been coupled to JET limiter plasmas. The plasma stored energy has reached 7 MJ with 13 MW of RF in 5 MA discharges with Z/sub eff/ = 2. When I/sub p//B/sub /phi// = 1 MA/T the stored energy can be 50% greater than the Goldston L mode scaling. This is due to transient stabilisation of sawteeth (up to 3 s) and to a significant energy content in the minority particles accelerated by RF (up to 30% of the total stored energy). Central temperatures of T/sub e/ - 11 keV and T/sub i/ = 8 keV have been reached with RF alone. (He/sup 3/)D fusion experiments have given a 60 kW fusion yield (fusion rate of 2 /times/ 10/sup 16/ s/sup /minus/1/ in the form of energetic fast particles (14.7 MeV(H), 3.6 MeV(He/sup 4/)) in agreement with modelling. When transposing the same calculation to a (D)T scenario, Q is predicted to be between 0.l2 and 0.8 using plasma parameters already achieved. For the first time, a peaked density profile generated by pellet injection could be reheated and sustained by ICRF for 1.2 s. Electron heat transport in the central region is reduced by a factor 2 to 3. The fusion product n/sub io//tau//sub E/T/sub io/ reaches 2.2 /times/ 10/sup 20/ m/sup /minus/3//center dot/s/center dot/kev in 3 MA discharges which is a factor of 2.3 times larger than with normal density profile. 18 refs., 13 figs., 3 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7080545
• Report Number(s): CONF-880534-14; ON: DE89002218
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANTENNAS
CONFINEMENT
CONFINEMENT TIME
ELECTRICAL EQUIPMENT
ELECTRON DENSITY
ELECTRON TEMPERATURE
EQUIPMENT
FUSION YIELD
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
ION TEMPERATURE
JET TOKAMAK
LIMITERS
NUCLEAR REACTION YIELD
PELLET INJECTION
PLASMA CONFINEMENT
PLASMA HEATING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
YIELDS