Construction and test results of a compact 0. 8 meter warm bore 1. 5 Tesla high homogeneity superconducting magnet for MR spectroscopy

Conference · Wed Jan 01 00:00:00 EST 1992 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5257938

Friman, E; Ikkala, O ^[1]; Islander, S ^[2]; Seppala, H; Pekola, J ^[3]; Sariala, A ^[4]; Collan, H K ^[5]

---

1. NESTE Oy Research Lab., P.O. Box 310, SF-06101 Porvoo (FI)
2. QUMAG Oy Quality Magnets Ltd., P.O. Box 98, SF-02211 Espoo (FI)
3. Dept. of Technical Physics, Helsinki Univ. of Technology, SF-02150 Espoo (FI)
4. Turku Univ. (Finland)
5. Optoelectronics Lab., Helsinki Univ. of Technology, SF-02150 (FI)

a superconducting magnet aimed at whole body MRI and spectroscopic studies was designed, constructed and tested. Magnet was wound with a 2 mm diameter NbTi/Cu multifilamentary composite conductor. The design field was B{sub 0} = 1.5 T, the design value for field homogeneity {Delta}B/B{sub 0} - 0.1 ppm over a 20 cm diameter spherical volume, and the design value for the field stability dB{sub 0}/dt/B{sub 0} {le} 0.1 ppm/h. During construction of the magnet, special emphasis was put into evaluating the winding accuracy which is attainable in practice. Dimensional measurements on the coil were compared with subsequent field measurements. The magnet was designed to be fully self-protective in the event of a quench. The quench calculations were verified by test quench measurements. The magnet was cooled by immersion in a 300 liter LHe-bath of an annular helium cryostat having an 0.8 m diameter GRP room temperature bore tube, with a 7 l/d LHE boil-off. In this paper constructional and design aspects are discussed and test results are given.

• OSTI ID: 5257938
• Report Number(s): CONF-910662-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 28:1; Conference: 12. international conference on magnet technology, Leningrad (USSR), 23-28 Jun 1991; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
NMR SPECTROMETERS
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING COILS
ACCURACY
COOLING
DESIGN
FABRICATION
PERFORMANCE TESTING
CRYOSTATS
HELIUM
MAGNETIC FIELDS
NIOBIUM ALLOYS
STABILITY
SUPERCONDUCTING COMPOSITES
TITANIUM ALLOYS
ALLOYS
COMPOSITE MATERIALS
CONTROL EQUIPMENT
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELEMENTS
EQUIPMENT
FLUIDS
GASES
MAGNETS
MATERIALS
MEASURING INSTRUMENTS
NONMETALS
RARE GASES
SPECTROMETERS
SUPERCONDUCTING DEVICES
TESTING
THERMOSTATS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)
360107 - Metals & Alloys- Superconducting Properties- (1992-)
440103 - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation