Claims
- 1. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel,
- a beam member made substantially of stainless steel and being disposed across an inner diametral portion of said coil container for supporting said superconducting coil; and
- a suppressing means disposed along said beam member for suppressing eddy current flow through a closed loop including said beam member and said coil container.
- 2. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said beam member having a structure which substantially interrupts eddy current flow through the closed loop.
- 3. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said beam member being partially composed of a material which substantially interrupts eddy current flow through the closed loop.
- 4. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes at least a portion of at least one of radiant heat shield which covers said beam member and said coil container being at least partly composed of a material which substantially interrupts eddy current flow through the closed loop.
- 5. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said beam member being at least partially composed of an electrical insulator.
- 6. A superconducting magnet as claimed in claim 5, wherein said electrical insulator is any one of fiberglass reinforced plastics, alumina, and carbon fiber glass reinforced plastics.
- 7. A superconducting magnet as claimed in claim 5, wherein said electrical insulator is a fluorine resin for an electrical insulator at low temperature.
- 8. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said beam member being at least partially composed of a high electric resistance material.
- 9. A superconducting magnet as claimed in claim 8, wherein said beam member is composed of inconel as said high electric resistance material.
- 10. A superconducting magnet as claimed in claim 8, wherein at least a part of said beam member is made highly electrically resistant by being composed of a bellow structure.
- 11. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said coil container being composed in such a manner that at least one of an electrical insulator material and a high electrical resistant material is arranged along a body of said coil container for cutting off or reducing circulation of eddy current along said body.
- 12. A superconducting magnet as claimed in claim 1, wherein. said suppressing means includes said coil container being composed in such a manner that an external surface of said coil container is coated discontinuously with aluminum.
- 13. A superconducting magnet as claimed in claim 4, wherein said portion of said radiant heat shield is entirely composed of at least one of an electric insulator material and a high electric resistant material.
- 14. A superconducting magnet as claimed in claim 13, wherein said radiant heat shield other than said portion is made from aluminum.
- 15. A superconducting magnet as claimed in claim 4, wherein said portion of said radiant heat shield is partly composed of a high resistivity region for interrupting or reducing eddy current which otherwise would flow through said radiant heat shield covering the closed loop.
- 16. A superconducting magnet as claimed in claim 15, wherein said radiant heat shield other than said portion is made from aluminum.
- 17. A superconducting magnet as claimed in claim 1, wherein said suppressing means includes said beam member being arranged at such a position that eddy current which flows through the closed loop is interrupted.
- 18. A superconducting magnet as claimed in claim 17, wherein said low resistivity material is any of aluminum, copper, gold, and silver.
- 19. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein said beam member is at least partially composed of an electrical insulator for preventing eddy current flow through said beam member.
- 20. A superconducting magnet as claimed in claim 19, wherein
- said electrical insulator is any one of fiberglass reinforced plastics, alumina, and carbon fiberglass reinforced plastics.
- 21. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein an electrical conduction path along said beam member is interrupted with an electrical insulator disposed along said beam member which prevents eddy current flowing through a closed loop being composed of said beam member and said coil container.
- 22. A superconducting magnet as claimed in claim 21, wherein
- said electrical insulator is fluorine resin for an insulator at low temperature.
- 23. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein said beam member is at least partially composed of a high electric resistance material for reducing eddy current flow through said beam member.
- 24. A superconducting magnet as claimed in claim 23, wherein
- said beam member is partially composed of inconel as said high electric resistance material.
- 25. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein said beam member contains areas composed of a high electric resistance material which reduces eddy current flowing through a closed loop being composed of said beam member and said coil container.
- 26. A superconducting magnet as claimed in claim 25, wherein
- a part of said beam member is made highly electrically resistant by being composed of a bellow structure.
- 27. A superconducting magnet as claimed in any of claims from claim 1 to claim 26, wherein
- said coil container is composed in such a manner that at least one of an electrical insulator material and a high electrical resistant material is arranged along a body of said coil container for cutting off or reducing circulation of eddy current along said body.
- 28. A superconducting magnet as claimed in any of claims from claim 19 claim 26, wherein
- said coil container is composed in such a manner that an external surface of said coil container except portions composed of said electrical insulator or high electrical resistance material is coated discontinuously with aluminum.
- 29. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container,
- a radiant heat shield covering said beam member, wherein at least a portion of said radiant heat, shield covering said beam member is entirely composed of at least one of an electric insulating material and a high electrical resistant material.
- 30. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container,
- a radiant heat shield covering said beam member, wherein
- a portion of said radiant heat shield coveting said beam member is partly composed of a high resistivity region for interrupting or reducing eddy current which flows through said radiant heat shield as part of a closed loop being composed of said beam member and said coil container.
- 31. A superconducting magnet as claimed in any one of claim 29 and claim 30, wherein
- said radiant heat shield is at least partially made from stainless steel or inconel.
- 32. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein said beam member has a construction at a predetermined position such that eddy current which otherwise would flow through a closed loop being composed of said beam member and said coil container is interrupted.
- 33. A superconducting magnet comprising:
- a superconducting coil,
- a coil container made substantially of aluminum coated stainless steel, and
- a beam member made substantially of stainless steel and being disposed across an inner diameteral portion of said coil container, wherein a surface of said beam member is coated with at least one of an electric conductor material and a low resistivity material for reducing eddy current flow through said beam member.
Priority Claims (1)
Number |
Date |
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Kind |
3-239900 |
Sep 1991 |
JPX |
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Parent Case Info
This appliation is a continuation of Ser. No. 07/947,400, filed Sep. 21, 1992, now abandoned.
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Continuations (1)
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Number |
Date |
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Parent |
947400 |
Sep 1992 |
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