Design of 12-T Yin-Yang magnets operating in subcooled, superfluid helium. [Nb-Ti and Nb/sub 3/Sn]

Conference · Fri Oct 09 00:00:00 EDT 1981

OSTI ID:5922939

Cornish, D N; Hoard, R W; Baldi, R

A conceptual design study of a large 12-T yin-yang pair of coils, typical of the plug coils envisioned for a tandem-mirror facility to follow MFTF, has been completed. Because of its larger size and field strength, the magnetic forces are much greater than those experienced on MFTF. The main purpose of this study, therefore, is to assess the feasibility of such a device, paying particular attention to mechanical stress and conductor strain. The conductor proposed operates at 15.6 kA and consists of a rectangular half-hard copper stabilizer with a Nb-Ti insert in the low-field regions and Nb/sub 3/Sn in the high field. The coil is divided into four sections in the longitudinal direction, with steel substructure to limit the winding stress to an acceptable level. The conductor is cryostatically stabilized in superfluid He at 1.8K and 1.2 atm, with an operating heat flux of 0.8 W.cm/sup -2/.

• Research Organization: Lawrence Livermore National Lab., CA (USA); General Dynamics/Convair, San Diego, CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5922939
• Report Number(s): UCRL-85957; CONF-811040-12; ON: DE82001059; TRN: 82-001448
• Resource Relation: Conference: 9. symposium on engineering problems of fusion research, Chicago, IL, USA, 26 Oct 1981
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MFTF DEVICES
SUPERCONDUCTING MAGNETS
DESIGN
MAGNET COILS
NIOBIUM ALLOYS
SIZE
STRAINS
STRESSES
TIN ALLOYS
TITANIUM ALLOYS
ALLOYS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETIC MIRRORS
MAGNETS
OPEN PLASMA DEVICES
SUPERCONDUCTING DEVICES
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields
420201 - Engineering- Cryogenic Equipment & Devices