Abstract: In a cryogenic loop heat pipe, a working fluid for heat transport is contained in a loop capillary tube, and a portion of the loop capillary tube is used as a heat absorbing portion (A) while a portion other than the heat absorbing portion (A) is used as a heat dissipating portion (B). In this heat pipe, when the heat exchange length of the heat absorbing portion A of the capillary tube is represented by l, and the inner diameter of the capillary tube at the heat absorbing portion A is represented by d, l and d satisfy 15d<l<882d. When a Laplace constant L is given by L=[&sgr;/{(&rgr;1−&rgr;v)g}]0.5, the inner diameter d satisfies L<d<3L.

Abstract: In the adiabatic apparatus of the present invention, a vessel includes an adiabatic layer in which an object is taken. A plurality of thermal shield plates are located in the adiabatic layer. Each thermal shield plate concentrically surrounds the object. A temperature control section cools or heats the object and the plurality of thermal shield plates. A switch section thermally connects the temperature control section to the plurality of thermal shield plates and the object if temperature of the plurality of thermal shield plates and the object is controlled, and thermally separates the temperature control section from the plurality of thermal shield plates and the object if control of the temperature of the plurality of thermal shield plates and the object is completed.

Abstract: A cryogenic cooling apparatus including a vacuum container for containing an object to be cooled, at least one refrigerator for cooling the object, and a thermal switch unit. The refrigerator has a high-temperature cooling stage and a low-temperature cooling stage connected to the high-temperature cooling stage via a low-temperature cylinder. The thermal switch unit has at least one high-temperature heat transfer member attached to the high-temperature cooling stage, at least one low-temperature heat transfer member attached to the low-temperature cooling stage and separated from the high-temperature heat transfer member, and a sealed container provided between the high-temperature cooling stage and the low-temperature cooling stage.

Abstract: A cryogenic cooling apparatus is provided, wherein the degree of freedom of installation and use is increased without deteriorating the reliability or stability and the range of uses of the apparatus is also increased. A coil unit and a refrigeration unit are positioned such that a second heat conductive member disposed on an extendible wall of a vacuum container and a fourth heat conductive member disposed on an extendible wall of another vacuum container face each other coaxially. In this state, the coil unit and refrigeration unit are relatively moved to approach each other, and thus the second heat conductive member and fourth heat conductive member come in contact. If the coil unit and refrigeration unit are further moved, the extendible wall extends and consequently the second heat conductive member comes in contact with a first heat conductive member. In addition, the extendible wall contracts and consequently the fourth heat conductive member comes in contact with a third heat conductive member.

Abstract: A superconducting magnet apparatus comprises a superconducting coil unit, and a refrigerant-filled chamber type refrigerator having a plurality of cooling stages. At least a final cooling stage of the cooling stages includes a static-type refrigerant-filled chamber and is associated with the superconducting coil unit, and at least a first cooling stage of the cooling stages includes a movable-type refrigerant-filled chamber.

Abstract: A cooling apparatus comprises a main refrigerator having a refrigerant-filled chamber, a sub-refrigerator connected parallel to the main refrigerator and having a refrigerant-filled chamber, switch control means for controlling the switching operation between the supply of a refrigerant used in the main refrigerator to the sub-refrigerator, and the stop of the supply of the refrigerant, on the basis of predetermined conditions.

Abstract: A superconducting coil apparatus comprises a cryostat, a superconducting coil body contained in a cryostat and including a surface portion of an epoxy resin layer, and an interposing member interposed between the resin layer of the superconducting coil body and the cryostat and including a block with a through-hole, a thermal barrier member and a friction-reducing member interposed between the block and the heat barrier member. The thickness of that portion of the surface portion of the superconducting coil body, which contacts the interposing member, is set in a range of 0.4 mm to 3.5 mm, and the thickness of the other portion of the surface portion is set to less than 0.4 mm.