SUPERCONDUCTING MAGNET AND METHOD FOR ADJUSTING THE SAME

• US 20150024941A1
• Filed: 04/20/2012
• Published: 01/22/2015
• Est. Priority Date: 04/20/2012
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Tamura, Hajime
• Granted Patent: US 9,177,707 B2
• Time in Patent Office: Days
• US Class Current: 505/211
• CPC Class Codes: G01R 33/3815 with superconducting coils, e.g. power supply therefor
• CPC Class Codes: H01F 29/12 having movable coil, winding, or part thereof; having movable shield
• CPC Class Codes: H01F 6/00 Superconducting magnets; Superconducting coils magnetic resonance assemblies using superconducting coil systems G01R33/3815
• CPC Class Codes: H01F 6/04 Cooling
• CPC Class Codes: H01F 6/06 Coils, e.g. winding, insulating, terminating or casing arrangements therefor
• CPC Class Codes: H01F 7/066 Electromagnets with movable winding

Abstract

A superconducting magnet includes a pair of superconducting coils, two heat shields surrounding the pair of superconducting coils, respectively, two vacuum chambers accommodating the two heat shields, respectively, and facing each other with a predetermined space sandwiched therebetween, a magnetic shield covering at least a portion of the two vacuum chambers, and two position adjustment mechanisms supporting the two vacuum chambers, respectively, in a position-adjustable manner. The two position adjustment mechanisms change distribution of a static magnetic field formed in the predetermined space by the pair of superconducting coils, by adjusting relative positional relation between the two vacuum chambers.

Claims

1. A superconducting magnet, comprising:

a pair of superconducting coils;

two heat shields surrounding said pair of superconducting coils, respectively;

two vacuum chambers accommodating said two heat shields, respectively, and facing each other with a predetermined space sandwiched therebetween;

a magnetic shield covering at least a portion of said two vacuum chambers; and

two position adjustment mechanisms supporting said two vacuum chambers, respectively, in a position-adjustable manner,

said two position adjustment mechanisms changing distribution of a static magnetic field formed in said predetermined space by said pair of superconducting coils, by adjusting relative positional relation between said two vacuum chambers,

said magnetic shield having position references for adjustment of positions of said two vacuum chambers by said two position adjustment mechanisms.

3. The superconducting magnet according to claim 1, wherein each of said two position adjustment mechanisms includes a linear guide provided on said magnetic shield, and a jack provided on the linear guide.

4. The superconducting magnet according to claim 1, wherein each of said two position adjustment mechanisms includes an internal thread provided to penetrate through said magnetic shield, and a set screw screwed into the internal thread.

2. (canceled)

5. A method for adjusting a superconducting magnet, the superconducting magnet including a pair of superconducting coils, two heat shields surrounding said pair of superconducting coils, respectively, two vacuum chambers accommodating said two heat shields, respectively, and facing each other with a predetermined space sandwiched therebetween, a magnetic shield covering at least a portion of said two vacuum chambers, and two position adjustment mechanisms supporting said two vacuum chambers, respectively, in a position-adjustable manner, the method comprising the steps of:

measuring distribution of a static magnetic field formed in said predetermined space by said pair of superconducting coils, with a magnetic sensor; and

adjusting relative positional relation between said two vacuum chambers by said two position adjustment mechanisms, based on a result of measurement with said magnetic sensor in the step of measuring the distribution of said static magnetic field,

in the step of measuring the distribution of said static magnetic field, said magnetic sensor being arranged within said predetermined space by attaching a jig for said magnetic sensor to a position reference of said magnetic shield.

7. The method for adjusting the superconducting magnet according to claim 5, wherein, in the step of adjusting the relative positional relation between said two vacuum chambers, the relative positional relation between said two vacuum chambers is adjusted using a linear guide provided on said magnetic shield and a jack provided on the linear guide which are included in each of said two position adjustment mechanisms.

8. The method for adjusting the superconducting magnet according to claim 5, wherein, in the step of adjusting the relative positional relation between said two vacuum chambers, the relative positional relation between said two vacuum chambers is adjusted using an internal thread provided to penetrate through said magnetic shield and a set screw screwed into the internal thread which are included in each of said two position adjustment mechanisms.

6. (canceled)