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A superconducting linear motor drive for a positive displacement bellows pump for use in the g-2 cryogenics system

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1 Author(s)
Green, M.A. ; Lawrence Berkeley Lab., CA, USA

Forced two-phase cooling of indirectly cooled superconducting magnets requires circulation of liquid helium through the magnet cooling channel. A bellows helium pump is one possible way of providing helium flow to a magnet cooling system. Since the bellows type of helium pump is immersed in liquid helium, a superconducting linear motor drive appears to be an attractive option. This report describes a linear motor drive that employs oriented permanent magnet materials such as samarium-cobalt as the stator magnet system and a superconducting loudspeaker voice coil type of drive as the armature of the linear motor. This report examines drive motor requirements for a helium pump.<>

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Applied Superconductivity, IEEE Transactions on  (Volume:5 ,  Issue: 2 )