RF heating and current drive experiment on JT-60
Recent experimental results of Lower Hybrid and Ion Cyclotron Range of Frequencies (LHRF and ICRF) heating and current drive are presented on JT-60 at JAERI. Three LHRF at 2 GHz and one ICRF at 120 MHz system are installed in JT-60. Each unit has launched 2.1--2.4 MW of RF power into the JT-60, so far. Steady current up to 2 MA for 2.5 sec have been maintained only by LHCD at a density of n-bar/sub e/ = 0.32 x 10/sup 19/ m/sup -3/ with 3.1 MW. The current drive efficiency defined by eta/sub C//sub D/ = n-bar/sub e/ (10/sup 19/ m/sup -3/)R(m)I/sub R//sub F/(MA)/P/sub L//sub H/(MW) reach 1.5--3.0 by combination of LHCD and NBI heating. High central electron heating up to 6 keV is demonstrated at the density n-bar/sub e/ = 1.7 x 10/sup -19/ m/sup -3/. Current profile control and improvement of energy confinement time via LHCD is observed with and without NBI heating. Optimization of the second harmonic ICRF heating is studied with 2 x 2 phased loop antenna. In combination heating of ICRF and NBI, remarkable beam acceleration is observed in the plasma core.
- Research Organization:
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka, Ibaraki-ken 311-02, Japan
- OSTI ID:
- 7020508
- Report Number(s):
- CONF-870570-; TRN: 88-027476
- Journal Information:
- AIP Conf. Proc.; (United States), Vol. 159:1; Conference: 7. topical conference on applications of radio-frequency power to plasmas, Kissimmee, FL, USA, 4 May 1987
- Country of Publication:
- United States
- Language:
- English
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Lower-hybrid current drive and ICRF heating experiments on JT-60U
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Related Subjects
ANTENNAS
COUPLING
JT-60 TOKAMAK
PLASMA CONFINEMENT
PLASMA
CURRENT-DRIVE HEATING
LOWER HYBRID HEATING
CYCLOTRON RADIATION
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
GHZ RANGE 01-100
IONS
JAERI
KEV RANGE 01-10
PLASMA DENSITY
PLASMA HEATING
POWER
RF SYSTEMS
BREMSSTRAHLUNG
CHARGED PARTICLES
CONFINEMENT
DATA
ELECTRIC HEATING
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EQUIPMENT
FREQUENCY RANGE
GHZ RANGE
HEATING
HIGH-FREQUENCY HEATING
INFORMATION
JAPANESE ORGANIZATIONS
JOULE HEATING
KEV RANGE
NATIONAL ORGANIZATIONS
NUMERICAL DATA
RADIATIONS
RESISTANCE HEATING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700108* - Fusion Energy- Plasma Research- Wave Phenomena
700101 - Fusion Energy- Plasma Research- Confinement
Heating
& Production
700102 - Fusion Energy- Plasma Research- Diagnostics