Superconducting magnet device
AssigneeKabushiki Kaisha Toshiba
InventorsKinya Matsutani, Katutoki Sasaki
Life of this patent
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Abstract
A cold insulation vessel comprises an inner chamber in which cryogen is enclosed, an outer chamber to enclose this inner chamber and a shield member against heat radiation which is provided between the inner chamber and the outer chamber. This vessel is provided to hold a superconducting coil which is enclosed in the inner chamber at a very low temperature. A power lead is provided to supply an exciting current to this superconducting coil. A recondenser is provided to recondense the evaporated gas of the cryogen in the inner chamber. The small refrigerator means has a plurality of refrigeration stages which are directly coupled to the power lead and the recondenser.
Claims11
A superconducting magnet device comprising:
- a cold insulation vessel which is composed of an inner chamber in which cryogen is sealed, and outer chamber for enclosing said inner chamber and a shield member for heat radiation which is provided between said inner chamber and said outer chamber, said vessel holding a superconducting coil which is enclosed in said inner chamber at a very low temperature;
- a power lead for supplying an exciting current to said superconducting coil;
- a recondenser for recondensing the evaporated gas of the cryogen in said inner chamber;
- small refrigerator means having a plurality of refrigeration stages which are directly and respectively coupled to said power lead and said recondenser;
- and
- control means for controlling the refrigerating capability of said small refrigerator means in accordance with the quantity of heat penetrating into said add insulation vessel.
Dependencies are inferred from the claim text.