High-field launch electron cyclotron heating experiments in the ELMO Bumpy Torus

Technical Report · Wed May 01 00:00:00 EDT 1985

DOI:https://doi.org/10.2172/5734430· OSTI ID:5734430

Rasmussen, D. A.; Batchelor, D. B.; Swain, D. W.; White, T. L.; Kimrey, H. D.; Bigelow, T. S.; Cobble, J. A.; Hillis, D. L.; Richards, R. K.; Uckan, T.

The midplane microwave heating system in the ELMO Bumpy Torus (EBT) was supplemented with power launched from the high-field side of the fundamental resonance by an antenna in the magnet coil throat. Up to 43 kW of polarized (extraordinary mode), 28-GHz power was successfully launched with one antenna. Measurements were made of changes in the core and hot electron ring plasma parameters when throat-launch power was added. In sharp contrast to initial expectations, the bulk core plasma parameters were degraded while the ring parameters, in the launch cavity, were improved. These results are explained in light of a modified picture of electron cyclotron heating (ECH) in EBT. A picture of localized microwave absorption and particle losses is supported by additional measurements.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5734430
• Report Number(s): ORNL/TM-9399; ON: DE85012068
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELMO BUMPY TORUS
ECR HEATING
ABSORPTION
ANTENNAS
ENERGY TRANSFER
MAGNET COILS
POLARIZATION
BUMPY TORI
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELMO DEVICES
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA HEATING
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production