EBT: an alternate concept to tokamaks and mirrors
The ELMO Bumpy Torus (EBT) is a hybrid magnetic trap formed by a series of toroidally connected simple mirrors. It differs from a tokamak, the present main-line approach, in that plasma stability and heating are obtained in a current-free geometry by the application of steady-state, high power, electron cyclotron resonance heating (ECH) producing a steady-state plasma. The primary motivation for EBT confinement research is the potential for a steady-state, highly accessible reactor with high ..beta... In the present EBT-I/S device, electron confinement has been observed to agree with the predictions of theory. The major emphasis of the experimental program is on the further scaling of plasma parameters in the EBT-I/S machine with ECH frequency (10.6, 18, and 28 GHz), resonant magnetic field (0.3, 0.6, and 1 T), and heating power (30, 60, and 200 kW). In addition, substantial efforts are under way or planned in the areas of ion cyclotron heating, neutral beam heating, plasma-wall interactions, impurity control, synchrotron radiation, and divertors. Recently, EBT has been selected as the first alternative concept to be advanced to the proof-of-principle stage; this entails a major device scale-up to allow a reasonable extrapolation to a DT-burning facility. The status and future plans of the EBT program, in particular the proof-of-principle experiment (EBT-P), are discussed.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6769622
- Report Number(s):
- CONF-801037-24(Draft); TRN: 80-019683
- Resource Relation:
- Conference: American Vacuum Society conference, Detroit, MI, USA, 13 Oct 1980
- Country of Publication:
- United States
- Language:
- English
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Status of EBT research
Plasma confinement and heating in the ELMO Bumpy Torus (EBT)
Related Subjects
ELMO BUMPY TORUS
PLANNING
HIGH-FREQUENCY HEATING
PLASMA CONFINEMENT
REVIEWS
SCALING LAWS
CONFINEMENT
DOCUMENT TYPES
ELMO DEVICES
HEATING
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA HEATING
THERMONUCLEAR DEVICES
700200* - Fusion Energy- Fusion Power Plant Technology