Assessment of magnetic field asymmetries in ELMO Bumpy Square

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5760541

Uckan, T; Uckan, N A

There exist two separate and independent magnetic field asymmetries in the ELMO Bumpy Square (EBS). One is associated with the small perturbations in the magnetic field, known as the field errors, caused by coil misalignments during installation, imperfection in coil winding, etc. The second source of asymmetry is the magnetic field ripple in the high-field toroidal solenoids (corners) produced by the finiteness of the number of coils. In general, these two sources of asymmetry introduce enhanced transport losses (in addition to other effects) to the system, although they affect different classes of particles. Toroidally passing (circulating) particles (v/sub parallel//v approx. 1) are influenced by the field errors, whereas trapped particles (v/sub parallel//v approx. 0) in the corners are influenced by the field ripple. In this paper we discuss these two effects separately and calculate the allowable magnitudes of the field error and field ripple in EBS, both for an experimental-size device and for a reactor.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5760541
• Report Number(s): CONF-850310-97; ON: DE85011559
• Resource Relation: Conference: 6. topical meeting on the technology of fusion energy, San Francisco, CA, USA, 3 Mar 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELMO BUMPY TORUS
MAGNETIC FIELD CONFIGURATIONS
ALIGNMENT
ERRORS
MAGNET COILS
MAGNETIC FIELD RIPPLES
BUMPY TORI
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELMO DEVICES
EQUIPMENT
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields