Superconducting magnet device
First Claim
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1. A superconducting magnet device comprising:
- a refrigerator having a cooling stage;
a tubular former having a hollow structure;
a permanent current switch formed by a superconducting wire wound on the former;
a heater to heat the former;
a heat transfer member that has a smaller coefficient of thermal expansion than the former and that has a shape that is insertable in the former when the former is thermally expanded by the heater;
an elastic thermal conductor connecting the heat transfer member and the cooling stage; and
a superconducting coil connected in parallel to the permanent current switch.
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Abstract
A permanent current switch device of a refrigerator cooling-type superconducting magnet includes a superconducting coil cooled by solid thermal conduction and a permanent current switch. A heat transfer member is thermally connected to a cooling stage and is structured to be inserted into and removable from a former of the permanent current switch. Due to differences in thermal expansion between the heat transfer member and the former, a permanent current mode can be stably maintained.
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Citations
5 Claims
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1. A superconducting magnet device comprising:
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a refrigerator having a cooling stage; a tubular former having a hollow structure; a permanent current switch formed by a superconducting wire wound on the former; a heater to heat the former; a heat transfer member that has a smaller coefficient of thermal expansion than the former and that has a shape that is insertable in the former when the former is thermally expanded by the heater; an elastic thermal conductor connecting the heat transfer member and the cooling stage; and a superconducting coil connected in parallel to the permanent current switch. - View Dependent Claims (2, 3, 4, 5)
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Specification