公开(公告)号：US20250060436A1

公开(公告)日：2025-02-20

申请号：US18797686

申请日：2024-08-08

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Katsutoshi MIZUNO ,  Takehiro SHIBUYA

IPC: G01R33/3815 ,  G01R33/38

Abstract: A superconducting magnet device of an embodiment includes a vacuum vessel, a superconducting coil, and an insulating load support. The insulating load support supports the superconducting coil through the thermal deformation cancellation 5 mechanism that generates a second deformation amount in a direction in which a first deformation amount applied from the superconducting coil to the insulating load support is canceled out due to thermal deformation occurring in the superconducting coil when the inside of the vacuum vessel is cooled to an extremely low temperature. The thermal deformation cancellation mechanism includes a thermal deformation member. The 10 thermal deformation member includes at least a material having a second coefficient of thermal expansion determined based on a first coefficient of thermal expansion of a material forming the superconducting coil, and generates the second deformation amount by thermally deforming in the same environment as the superconducting coil.

公开(公告)号：US20250060435A1

公开(公告)日：2025-02-20

申请号：US18796780

申请日：2024-08-07

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Takehiro SHIBUYA ,  Hiromi KAWAMOTO

IPC: G01R33/3815 ,  G01R33/38 ,  G01R33/3875

Abstract: In one embodiment, a superconducting magnet includes: at least one primary superconducting coil configured to generate a primary magnetic field; at least one secondary superconducting coil configured to generate a secondary magnetic field in a direction opposite to a direction of the primary magnetic field; and a superconducting shim coil configured to surround part or all of an outer surface of at least one of the at least one primary superconducting coil and the at least one secondary superconducting coil and corrects distribution of a static magnetic field generated by both the at least one primary superconducting coil and the at least one secondary superconducting coil.

公开(公告)号：US20240161953A1

公开(公告)日：2024-05-16

申请号：US18484591

申请日：2023-10-11

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Katsutoshi MIZUNO ,  Takehiro SHIBUYA

IPC: H01F6/06

CPC classification number: H01F6/06

Abstract: A superconducting coil device of an embodiment includes stacked pancake coils. Each of the stacked pancake coils includes an inner frame, a separator disposed outside the inner frame, and a superconducting wire wound part formed on the separator. The superconducting coil device further includes a position adjustment part configured to adjust relative positions of the stacked pancake coils.

公开(公告)号：US20240077557A1

公开(公告)日：2024-03-07

申请号：US18455752

申请日：2023-08-25

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Takehiro SHIBUYA ,  Hiromi KAWAMOTO

IPC: G01R33/3815 ,  H01F6/06

CPC classification number: G01R33/3815 ,  H01F6/06

Abstract: In one embodiment, a superconducting magnet includes: at least one set of coil segment including a first coil segment formed of a superconducting wire through which an electric current flows in a forward direction, and a second coil segment formed of the superconducting wire through which an electric current flows in a direction opposite to the forward direction; and at least one intermediate wiring provided between the first coil segment and the second coil segment and configured to connect the first coil segment and the second coil segment without disconnection and change directions of electric currents such that that the electric current flows through the first coil segment in the forward direction and the electric current flows through the second coil segment in a direction opposite to the forward direction.

公开(公告)号：US20240077555A1

公开(公告)日：2024-03-07

申请号：US18451279

申请日：2023-08-17

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Takehiro SHIBUYA ,  Hiromi KAWAMOTO

IPC: G01R33/3815 ,  H01F6/00 ,  H01F6/02 ,  H01F6/06

CPC classification number: G01R33/3815 ,  H01F6/008 ,  H01F6/02 ,  H01F6/06

Abstract: In one embodiment, a superconducting magnet includes: at least one primary superconducting coil configured to generate a primary static magnetic field by a persistent current flowing during a persistent current mode; at least one secondary superconducting coil configured to generate a secondary static magnetic field different from the primary static magnetic field in response to external control; and a static-magnetic-field control switch configured to (i) supply the secondary superconducting coil with part of the persistent current to generate the secondary static magnetic field by being closed in response to the external control during the persistent current mode and (ii) stop energization of the secondary superconducting coil and generation of the secondary static magnetic field by being opened in response to the external control during the persistent current mode.