Coupling of an ICRF (ion cyclotron range of frequencies) compact loop antenna to H-mode plasmas in DIII-D

Conference · Fri May 01 04:00:00 EDT 1987

OSTI ID:6056627

Mayberry, M J; Baity, F W; Hoffman, D J; Luxon, J L; Owens, T L; Prater, R

Low power coupling tests have been carried out with a prototype ICRF compact loop antenna on the DIII-D tokamak. During neutral-beam-heated L-mode discharges the antenna loading is typically R approx. = 1 - 2..cap omega.. for an rf frequency of 32 MHz (B/sub T/ = 21 kG, ..omega.. = 2..cap omega../sub D/(0)). When a transition into the H-mode regime of improved confinement occurs, the loading drops to R approx. = 0.5 - 1.0..cap omega... During ELMs, transient increases in loading up to several Ohms are observed. The apparent sensitivity of ICRF antenna coupling to changes in the edge plasma profiles associated with the H-mode regime could have important implications for the design of future high power systems.

• Research Organization: General Atomics Co., San Diego, CA (USA); Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC03-84ER51044
• OSTI ID: 6056627
• Report Number(s): GA-A-18853; CONF-870570-20; ON: DE87012298
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
ANTENNAS
CONFINEMENT
DOUBLET REACTORS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EQUIVALENT CIRCUITS
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
PERFORMANCE TESTING
PLASMA CONFINEMENT
PLASMA HEATING
TESTING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS