Superconducting magnet apparatus

• US 9,305,691 B2
• Filed: 06/26/2014
• Issued: 04/05/2016
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Takahashi, Masahiko, Tosaka, Taizo, Miyazaki, Hiroshi, Iwai, Sadanori
• Primary Examiner(s): Rohrhoff, Daniel
• Application Number:
  US14/315,736
• Publication Number:
  US 20150051079A1
• Time in Patent Office: 649 Days
• US Class Current: 1/1
• CPC Class Codes: F25B 2400/06 Several compression cycles arranged in parallel
• CPC Class Codes: F25D 19/00 Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
• CPC Class Codes: H01F 6/04 Cooling
• CPC Class Codes: H01F 6/06 Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Abstract

According to one embodiment, a superconducting magnet apparatus includes: a first superconducting coil and a second superconducting coil respectively arranged in a vacuum container; a first cooling unit configured to cool the first superconducting coil; and a second cooling unit configured to cool the second superconducting coil and controlled independently from the first cooling unit by a cooling method different from the cooling method of the first cooling unit.

Claims

1. A superconducting magnet apparatus comprising:

a first superconducting coil and a second superconducting coil respectively arranged in a vacuum container;

a first cooling unit configured to cool the first superconducting coil; and

a second cooling unit configured to cool the second superconducting coil and controlled independently from the first cooling unit by a cooling method different from the cooling method of the first cooling unit.

2. The superconducting magnet apparatus according to claim 1, wherein one of the first superconducting coil and the second superconducting coil is a high temperature superconducting coil, and the other of the first superconducting coil and the second superconducting coil is a low temperature superconducting coil.

3. The superconducting magnet apparatus according to claim 2, wherein the high temperature superconducting coil is cooled from both ends of the high temperature superconducting coil.

4. The superconducting magnet apparatus according to claim 1, wherein at least one of the first cooling unit and the second cooling unit is configured by combining a cold accumulation refrigerator with a Joule-Thompson refrigerator.

5. The superconducting magnet apparatus according to claim 4, wherein a buffer tank is provided at a circuit of the Joule-Thompson refrigerator.

6. The superconducting magnet apparatus according to claim 4, wherein the cold accumulation refrigerator is a Gifford-McMahon refrigerator.

7. The superconducting magnet apparatus according to claim 1, wherein at least one of the first cooling unit and the second cooling unit is a cold accumulation refrigerator.

8. The superconducting magnet apparatus according to claim 1, wherein at least one of the first cooling unit and the second cooling unit is configured by combining a cold accumulation refrigerator with a gas circulation heat transfer circuit.

9. The superconducting magnet apparatus according to claim 8, further comprising a measurement unit configured to measure a temperature of the first superconducting coil or the second superconducting coil,

wherein the gas flow rate of the gas circulation heat transfer circuit is controlled on the basis of a temperature measurement value.

10. The superconducting magnet apparatus according to claim 8, wherein the gas circulation heat transfer circuit includes a buffer tank.

11. The superconducting magnet apparatus according to claim 8, wherein a pipe extending from the gas circulation heat transfer circuit is reciprocated a plurality of times between the cold accumulation refrigerator and the superconducting coil to be cooled.