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Cryocooler directly cooled 6 T NbTi superconducting magnet system with 180 mmroom temperature bore

Authors
Journal
Cryogenics
0011-2275
Publisher
Elsevier
Publication Date
Volume
34
Identifiers
DOI: 10.1016/s0011-2275(05)80151-1
Keywords
  • Magnets And Current Leads
Disciplines
  • Physics

Abstract

Abstract This paper describes a cryocooler cooled NbTi superconducting magnet system. The technical features of this magnet system are a 4K-Gifford-McMahon (GM) refrigerator using magnetic regenerator material and a high-Tc Bi 2Sr 2CaCu 2O y superconducting current lead. The NbTi coil was directly cooled by the 4K-GM refrigerator without liquid helium and it took about 21 hours for the NbTI coil to be cooled from room temperature to below 4 K. The stable magnetic field of 6 T at 3.5 K and the maximum magnetic field of 6.45 T were obtained in the 180 mm room temperature bore.

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