Abstract.
A new type of superconducting magnet, which is directly cooled by two 4-K GM cryocoolers (i.e. liquid-He-free), has been developed for neutron-scattering experiments. The magnet consists of a split pair of a (Nb, Ti)3Sn inner coil and a NbTi outer coil. The gap between the coils is 29 mm, and the upper and lower coils are supported by three rings made of Al alloy (4.5, 7.5, and 8 mm in thickness) and a plate of Al alloy (42.5° in angle). The total thickness of the Al alloy in the neutron path is 52 mm, and the transmission of the beam is about 60% for neutrons with 20 meV. The room-temperature bore is 51 mm in diameter, and in this bore one of the sample-cooling systems (4-K cryocooler or liquid-He-free dilution refrigerator) is inserted. The maximum field of 10 T is very stably obtained. Some results on the magnetism of strongly correlated electron systems obtained with this cryomagnet are presented.
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Received: 20 July 2001 / Accepted: 11 December 2001
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Katano, S., Minakawa, N., Metoki, N. et al. Liquid-He-free 10-T superconducting magnet for neutron scattering . Appl Phys A 74 (Suppl 1), s270–s272 (2002). https://doi.org/10.1007/s003390201803
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DOI: https://doi.org/10.1007/s003390201803