ELMO Bumpy Torus: An alternate concept to tokamaks and mirrors

Journal Article · Wed Apr 01 04:00:00 EST 1981 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.570890· OSTI ID:6497564

Glowienka, J C

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 mainline 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/Scale device (EBT-I/S), 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 alternate 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 EBT proof-of-principle experiment (EBT-P), are discussed.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6497564
• Journal Information: J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 18:3; ISSN JVSTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
CONFIGURATION
CONFINEMENT
ECR HEATING
ELMO BUMPY TORUS
ELMO DEVICES
HEATING
HIGH-BETA PLASMA
HIGH-FREQUENCY HEATING
ICR HEATING
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA CONFINEMENT
PLASMA HEATING
SPACE
THERMONUCLEAR DEVICES
TOROIDAL CONFIGURATION
VACUUM SYSTEMS