Status of EBT research

Conference · Sun Aug 01 04:00:00 EDT 1982

OSTI ID:5013249

Uckan, N. A.; Baity, F. W.; Batchelor, D. B.

Recent developments in the ELMO Bumpy Torus (EBT) program of experiment, theory, technology development, and reactor studies are reviewed. A 28-GHz gyrotron has been routinely operated at 200 kW (cw) on EBT-S. With operation through 200 kW, the electron transport in EBT-S continues to scale neoclassically. The ring power losses scale classically, and in all electron cyclotron heated devices ring temperatures scale with rho/sub eR/L (where rho/sub eR/ is the ring electron gyroradius and L is the magnetic field scale length). Initial, steady-state, fast-wave ion cyclotron heating experiments have been successful and show a several-fold increase in energetic ion population. Theoretical analysis of a large number of modes and ring core coupling in stability calculations indicates that a substantial, stable, finite-beta operating window is available with ..beta../sub core/ approx. 10%. The coupling of the ring power balance to the core plasma beta limits, based on the present theories, is of concern for a reactor optimization, and parametric studies indicate possible operating windows. The technology development for the next device, the EBT Proof-of-Principle (EBT-P) experiment, is progressing well, having achieved operation of the 60-GHz development gyrotron at 220 kW for 100 ms (70 kW for cw) and operation of the two superconducting development magnets (7.4 T, 1 x 10/sup 4/ A/cm/sup 2/) at the design field.

• Research Organization: Oak Ridge National Lab., TN (USA); McDonnell Douglas Astronautics Co., Huntington Beach, CA (USA); Missouri Univ., Rolla (USA); Rensselaer Polytechnic Inst., Troy, NY (USA); North Carolina Univ., Chapel Hill (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5013249
• Report Number(s): ORNL/TM-8006; CONF-810906-14; ON: DE82019729
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700200* -- Fusion Energy-- Fusion Power Plant Technology
DOCUMENT TYPES
ECR HEATING
ELECTRON RINGS
ELMO BUMPY TORUS
ELMO DEVICES
ENERGY LOSSES
HEATING
HIGH-FREQUENCY HEATING
ION DENSITY
LOSSES
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA HEATING
RESEARCH PROGRAMS
REVIEWS
SCALING LAWS
THERMONUCLEAR DEVICES