Abstract: A disclosed refrigerator installing structure that enables a refrigerator including a cylinder and a displacer to be installed in a vacuum vessel in which an object to be cooled is accommodated, the displacer being removed from the cylinder during maintenance, the cylinder being movable inside a sleeve between a position at which the cylinder thermally contacts the sleeve and another position at which the cylinder does not thermally contact the sleeve includes a discharge mechanism configured to discharge a gas inside a space formed between the sleeve and the cylinder if a pressure inside the space becomes greater than or equal to a predetermined pressure.

Abstract: A superconductive magnet includes a superconductive coil that is an air-core coil; a pair of bobbin bodies that support the superconductive coil while interposing the superconductive coil therebetween on both sides of a center axial line direction of the superconductive coil; an outer circumference-side binding portion that extends in the center axial line direction on an outer circumferential side of the superconductive coil to bind the pair of bobbin bodies; and a belt-shaped or a wire-shaped inner circumference-side tension imparted portion which extends in the center axial line direction on an inner circumferential side of the superconductive coil to connect the pair of bobbin bodies, and on which tension is imparted in the center axial line direction.

Abstract: A superconductive magnet includes a superconductive coil that is an air-core coil; a pair of bobbin bodies that support the superconductive coil while interposing the superconductive coil therebetween on both sides of a center axial line direction of the superconductive coil; an outer circumference-side binding portion that extends in the center axial line direction on an outer circumferential side of the superconductive coil to bind the pair of bobbin bodies; and a belt-shaped or a wire-shaped inner circumference-side tension imparted portion which extends in the center axial line direction on an inner circumferential side of the superconductive coil to connect the pair of bobbin bodies, and on which tension is imparted in the center axial line direction.

Abstract: A superconducting magnet apparatus includes superconducting coils in a vacuum vessel. The vacuum vessel is provided with a refrigerator for cooling the superconducting coils. The refrigerator includes a motor drive, displacers, and a cooling cylinder accommodating the displacers such that the displacers may reciprocate therein. The vacuum vessel has a sleeve for accommodating the cooling cylinder while isolating them from its vacuum area, the sleeve having an opening near the wall of the vacuum vessel. A first flange is provided at an opening in the cooling cylinder for inserting the displacers therein. The motor drive is attached to the first flange, with the displacers being inserted therein. The first flange has a cylindrical portion to be inserted in the sleeve to seal the space in the sleeve. The motor drive and the displacers can be removed, while leaving the first flange and the cooling cylinder unremoved.

Abstract: A superconducting magnet apparatus includes superconducting coils in a vacuum vessel. The vacuum vessel is provided with a refrigerator for cooling the superconducting coils. The refrigerator includes a motor drive, displacers, and a cooling cylinder accommodating the displacers such that the displacers may reciprocate therein. The vacuum vessel has a sleeve for accommodating the cooling cylinder while isolating them from its vacuum area, the sleeve having an opening near the wall of the vacuum vessel. A first flange is provided at an opening in the cooling cylinder for inserting the displacers therein. The motor drive is attached to the first flange, with the displacers being inserted therein. The first flange has a cylindrical portion to be inserted in the sleeve to seal the space in the sleeve. The motor drive and the displacers can be removed, while leaving the first flange and the cooling cylinder unremoved.