GB9508495D0 - Nmr magnet system with superconducting coil in a helium bath - Google Patents

Nmr magnet system with superconducting coil in a helium bath

Info

Publication number
GB9508495D0
GB9508495D0 GB9508495A GB9508495A GB9508495D0 GB 9508495 D0 GB9508495 D0 GB 9508495D0 GB 9508495 A GB9508495 A GB 9508495A GB 9508495 A GB9508495 A GB 9508495A GB 9508495 D0 GB9508495 D0 GB 9508495D0
Authority
GB
United Kingdom
Prior art keywords
chamber
helium
liquid helium
cryostat
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9508495A
Other versions
GB2286450A (en
GB2286450B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bruker Biospin GmbH
Forschungszentrum Karlsruhe GmbH
Original Assignee
Kernforschungszentrum Karlsruhe GmbH
Bruker Analytische Messtechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19904039332 external-priority patent/DE4039332A1/en
Priority claimed from DE19904039365 external-priority patent/DE4039365A1/en
Application filed by Kernforschungszentrum Karlsruhe GmbH, Bruker Analytische Messtechnik GmbH filed Critical Kernforschungszentrum Karlsruhe GmbH
Priority claimed from GB9126095A external-priority patent/GB2254409B/en
Publication of GB9508495D0 publication Critical patent/GB9508495D0/en
Publication of GB2286450A publication Critical patent/GB2286450A/en
Application granted granted Critical
Publication of GB2286450B publication Critical patent/GB2286450B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/04—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/068—Special properties of materials for vessel walls
    • F17C2203/0687—Special properties of materials for vessel walls superconducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F17C2221/017—Helium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use
    • F17C2270/0509—"Dewar" vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use
    • F17C2270/0527—Superconductors
    • F17C2270/0536—Magnetic resonance imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

In an NMR magnet system for generating a highly homogeneous magnetic field of high field strength, with at least one superconducting magnet coil which is arranged in a first chamber (101) of a cryostat in supercooled liquid helium at a temperature of less than 4.2 K, with the cryostat having at least one further chamber (102) containing liquid helium that is essentially at atmospheric pressure with a temperature of approximately 4.2 K, the first chamber is connected to the further chamber in such a way that the supercooled liquid helium located in the first chamber is also essentially at atmospheric pressure. A refrigerator (106) with which the liquid helium can be cooled to a temperature T << 4.2 K, especially to T APPROX 1.8 - 2.3 K, is provided in the first chamber. Helium pumped from the refrigerator (106) passes via inlet (161) into an annular heat exchanger (130) in a tower (131) and to an outlet (162). Radiation shields (121, 122) are thermally coupled to the heat exchanger (130). Helium evaporating from the upper chamber (102) leaves the tower (131) through outlet (163). Preferably the cryostat includes three towers (131). <IMAGE>
GB9508495A 1990-12-10 1991-12-09 Nmr magnet system with superconducting coil in a helium bath Expired - Fee Related GB2286450B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19904039332 DE4039332A1 (en) 1990-12-10 1990-12-10 NMR magnet with superconducting coil in supercooled helium bath - is kept at atmospheric presure and with temp. of supercooled helium in first cyrostat chamber less than 4.2 k with cryostat having at least one further chamber
DE19904039365 DE4039365A1 (en) 1990-12-10 1990-12-10 NMR magnet for highly homogeneous magnetic field - uses at least one superconducting magnetic coil in first chamber of cryostat in deep cooled liquid helium
GB9126095A GB2254409B (en) 1990-12-10 1991-12-09 NMR magnet system with superconducting coil in a helium bath

Publications (3)

Publication Number Publication Date
GB9508495D0 true GB9508495D0 (en) 1995-06-14
GB2286450A GB2286450A (en) 1995-08-16
GB2286450B GB2286450B (en) 1995-10-11

Family

ID=27201965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9508495A Expired - Fee Related GB2286450B (en) 1990-12-10 1991-12-09 Nmr magnet system with superconducting coil in a helium bath

Country Status (1)

Country Link
GB (1) GB2286450B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3702063B2 (en) * 1997-02-25 2005-10-05 株式会社東芝 Thermal insulation container, thermal insulation device, and thermal insulation method
GB2329700B (en) 1997-09-30 2001-09-19 Oxford Magnet Tech Improvements in or relating to cryostat systems
US6708503B1 (en) 2002-12-27 2004-03-23 General Electric Company Vacuum retention method and superconducting machine with vacuum retention

Also Published As

Publication number Publication date
GB2286450A (en) 1995-08-16
GB2286450B (en) 1995-10-11

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20091209