WO2013102509A1 - Aimant supraconducteur à structure autoporteuse - Google Patents

Aimant supraconducteur à structure autoporteuse Download PDF

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Publication number
WO2013102509A1
WO2013102509A1 PCT/EP2012/072864 EP2012072864W WO2013102509A1 WO 2013102509 A1 WO2013102509 A1 WO 2013102509A1 EP 2012072864 W EP2012072864 W EP 2012072864W WO 2013102509 A1 WO2013102509 A1 WO 2013102509A1
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WO
WIPO (PCT)
Prior art keywords
coils
main
superconducting magnet
coil
magnet according
Prior art date
Application number
PCT/EP2012/072864
Other languages
English (en)
Inventor
Matthew LONGFIELD
Yunxin GAO
Russell Peter Gore
Original Assignee
Siemens Plc
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
Application filed by Siemens Plc filed Critical Siemens Plc
Publication of WO2013102509A1 publication Critical patent/WO2013102509A1/fr

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Classifications

    • 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
    • G01R33/3802—Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly
    • 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
    • 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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Definitions

  • the present invention relates to structures of superconducting magnets such as used in magnetic resonance imaging (MRI) systems. It relates to the type of system in which a superconducting magnet is provided, composed of several essentially annular coils aligned along a common axis. In such magnets, it is common to have a series of “main” or “inner” coils (referred to as main coils hereafter), which generate most of the magnetic flux of the magnetic field produced within the bore of the magnet, and a number of “shield” or “outer” coils (referred to as shield coils hereafter), of greater diameter than the main coils, placed coaxially with the main coils. The shield coils usually overlap with the main coils, in an axial direction. Such magnets produce a magnetic field within their bore which is very homogeneous, within an imaging region. The imaging region is typically a sphere of about 50 cm diameter within the bore, at the geometric centre of the magnet.
  • axial will be used to describe a direction parallel to the common axis of the coils
  • radial will be used to describe any direction perpendicular to, and passing through, the common axis of the coils.
  • FIG. 5A schematically illustrates a conventional arrangement in which main coils 10 are wound into journals 12 machined into a solid former 14 which may be of aluminium or a composite material of glass fibre embedded in epoxy resin. Typically, the coils are themselves impregnated with epoxy resin, for example.
  • Shield coils 16 are held within similar formers or "journals" 18. The structure is essentially axisymmetrical about axis A-A. The journals 18 are typically retained in position relative to the main coils by aluminium webs 20, bolted to the former 14 at positions lying between main coils 10.
  • the webs 20 supporting the shield coils may only be attached to the former 14 at positions between main coils.
  • the different materials of the former and the coils will contract at different rates when cooled to operating temperature, which may cause the coils to move on the former, possibly causing quench or degrading the homogeneity of the resultant magnetic field.
  • the interaction between the coils and the former can be a mechanism for quenching due to heat generated at the slip plane interface.
  • the webs 20 supporting the shield coils may only be attached to the support tube 22 at positions between main coils 10. In use, stresses will be generated within the coils, as a result of the interaction of currents flowing in the coils with the generated magnetic field.
  • the limited possibilities for placement of webs 20 means that the interaction of the webs with the former may not assist in diminishing the effect of stresses on the coils.
  • Fig. 5B shows an alternative conventional arrangement, in which main coils 10 are attached to an inner surface of a support tube 22 by their radially outer surfaces.
  • the coils' radially outer surfaces are conventionally referred to as A2 surfaces, and this type of arrangement may be known as A2 bonding.
  • the tube 22 is typically of a composite material, for example filament wound glass fibre or glass fibre cloth impregnated with epoxy resin. Journals 18 may be provided, as described with reference to Fig. 5A, and these journals are attached to the support tube 22 by webs 20 bolted to the support tube.
  • Fig. 5C shows another alternative arrangement, in which the main coils 10 are attached to a support tube 22 by A2 bonding.
  • shield coils 16 are bonded to another support tube 24 by A2 bonding, and the two support tubes 22, 24 are held in fixed relative positions by attachment to a pair of end discs 26.
  • These end discs may be of a non-metallic composite material such as glass fibre cloth impregnated with epoxy resin, or may form part of a cryostat housing the magnet.
  • the spacer elements may be separate components which are bonded between completed coils, or may be permeable pieces which are included in an impregnation step during which the coils and the permeable pieces are impregnated together forming a monolithic structure of epoxy resin within which coils and permeable pieces are embedded.
  • Fig. 5D illustrates an example arrangement of this type, having a coil layout similar to that of Fig. 5C.
  • the present invention accordingly provides superconducting magnet structures in which shield coils are mounted to main coils formed as serially bonded magnets. Furthermore, the structures of the present invention enable control over resultant stresses within the coils structures in use, according to the design and construction of intermediate coil support structures which retain the shield coils on the main coils.
  • the present invention provides methods and apparatus as defined in the appended claims.
  • Fig. 1 shows an arrangement for mounting shield coils to main magnet coils according to an embodiment of the invention
  • Fig. 2 shows results of modelling of stresses in a main coil and shield coil, which are not mounted together, as if in use;
  • Fig. 3 shows results of modelling of stresses in a main coil and shield coil, which are mounted together according to an embodiment of the invention
  • Fig. 4 shows results of modelling of stresses in a main coil and shield coil, which are mounted together according to another embodiment of the invention
  • Figs. 5A-5C show conventional arrangements for mounting shield coils to main coils.
  • Fig. 6 shows an arrangement for mounting shield coils to main magnet coils according to another embodiment of the invention.
  • Fig. 1 shows a schematic part cross-section through an arrangement according to the present invention.
  • An example main coil 10 is shown, part of a structurally self- supporting magnet structure.
  • an example shield coil 16 is shown, mounted within a journal 18.
  • An intermediate coil support structure 31 is provided, comprising webs 30 and preferably also comprising partial oversleeve 32, joining the shield coil 16 to the radially outer surface of main coil 10.
  • the structurally self-supporting magnet structure comprising main coil 10 is therefore the support structure for the shield coils 16.
  • the intermediate coil support structure is attached to the structurally self-supporting magnet structure, such as by an adhesive bond, resin impregnation or bolting.
  • a support structure 31 is provided for mounting shield coils 16 onto main coils 10.
  • such support structure is arranged to reduce the localised hoop stress of the main coils, and to make use of structural properties of main coils to support the shield coils.
  • Structures of the present invention may also be arranged to at least partially offset large hoop stresses which may be generated during energisation of magnets of high field strength, or de-energising them, for example during a quench.
  • a structurally self-supporting magnet of annular coils 10 and spacer elements bonded to them is used as a structural base onto which the shield coils 16 are mounted by an intermediate coil support structure 31.
  • an intermediate coil support structure 31 comprises a web 30 directly bonded onto main coils 10 of a structurally self-supporting magnet structure. While this is preferably achieved by an adhesive bond both to main coil 10 and to shield coil 16, other techniques such as bolting the webs 30 to the structurally self-supporting magnet may be employed, in embodiments of the invention.
  • the intermediate coil support structure 31 may be found most effective when bonded to axially outer coils 10 of the structurally self-supporting magnet, although the invention allows the support structure 31 to be bonded to other coils if desired. Typically, best reduction in hoop stresses may be achieved by bonding the webs 30 to the main coils 10 at a region of highest hoop stress.
  • thermal contraction and structural properties of the intermediate coil support arrangement joining the shield coils to the main coils locally reduce hoop stress in the main coils.
  • structurally self-supporting shield coils may be used.
  • the intermediate coil support structure 31 includes a hoop stress restraining feature in the form of partial oversleeve 32, placed between main coil 10 and web 30, axially located only over the areas of maximum hoop stress. This provides effective strain relief, without large stresses due to axial thermal mismatch.
  • Partial oversleeve 32 need only cover a selected part of the axial length of main coil 10. This contrasts with conventional stress-relief arrangements in which an oversleeve, such as an overbinding, typically of resin-impregnated glass fibre or resistive wire, or an over-sleeve of a material of high tensile strength such as stainless steel, is applied over the whole surface of the main coil. During cooling of a superconducting magnet to operating temperature, coils tend to contract in the axial dimension rather more than materials such as resin impregnated glass fibre. In arrangements such as shown in Figs.
  • partial oversleeve 32 extends axially only part of the length of the coil, and so any stress due to differences in axial thermal contraction will have minimal effect, as the axial length of the partial oversleeve 32 is much reduced.
  • a composite material may be designed to match the thermal contraction of the coils. Even in this case, there is risk of thermally induced shear stresses, for example during a quench event, since the current-carrying turns of the coils will suddenly heat, and expand thermally, while the material of the oversleeve will not heat in the same way, and so will not expend to the same extent. As discussed above, these thermally induced interface stresses may lead to quench.
  • annular partial oversleeve 32 or discrete patches of oversleeve structure may be placed as required, wherever on the surface of the main magnet coils that localised stresses can usefully be minimised.
  • More effective stress relief may be provided by positioning the partial oversleeve to restrain particular regions of the main coil which would otherwise have been under a relatively large stress.
  • Annular partial oversleeve 32 which extends around the entire circumference of main coil 10 is effective at restraining hoop stress.
  • Positioning of individual patches of oversleeve structure with webs structures 30 may relieve stress at particular locations around the circumference of the main coil 10, but is not effective at restraining hoop stress.
  • the shield coils 16 In use, although hoop stresses on main magnet coils 10 tend to cause those coils to expand, such stresses may not affect the shield coils 16 to the same extent because they are in a region of lower field strength.
  • the hoop stress in a shield coil is a function of the cross-section of the coil, the cross-sectional area of the wire used, and the local strength of the background magnetic field.
  • By careful selection of the position of partial oversleeve 32 and the angle of webs 30, useful compensation of localised stress may be achieved by bracing selected locations on main coils 10 against the former 18 of shield coils 16.
  • the shield coils may be self-supporting, similar to the arrangement of Fig.
  • the angle of inclination a of the webs 30 relative to the radially outer surface of main coil 10 may be determined to allow partial oversleeve 32 to be positioned at an optimal location on the main coil 10 for local stress relief. There may be differences in thermal characteristics of the material of main coil 10, shield coil 16, partial oversleeve 32 and webs 30 which mean that the relative positions of the main coil 10 and shield coil 16 change during cooling of the magnet, which needs to be taken into account when designing the magnet so that all coils end up in the required relative positions when cooled.
  • the angle a may be chosen to optimise the stress relief effects of the present invention, to ensure correct relative positioning of shield coils once cooled.
  • the angle a may be greater than 90°, less than 90°, or exactly 90°, depending on the desired effects.
  • the correct angle to use in any particular structure may be determined by simulation.
  • Webs 30 need not be straight, as illustrated, but may be angled or curved if required, for example to provide the correct relative positioning of shield coils 16 and main coils 10 when cooled, to enable partial oversleeve 32 to be positioned at a desired axial location, or to provide appropriate stress relief force onto the main coil 10.
  • the material of webs 30 may bend as it is cooled, with the result that the angle a when at operating temperature may be controlled, to counteract any delamination effect of changing a on cooling.
  • the intermediate support structure 31 may comprise several individual webs 30 positioned around the circumference of main coil 10, it may alternatively comprise a single conical web, which may have the advantage of ensuring that the restraining effect of the support structure, braced against the shield coil, is applied equally around the circumference of the main coil 10.
  • a conical web may be made up of sections assembled around the main coil. Gaps may be left between such sections to provide an intermittent conical support structure.
  • the use of multiple discrete webs 30 may be simpler in terms of both design and assembly, although a conical web 30 provides the advantages of radial strength for retaining hoop stress and stiffness to mechanically support the shield coil 16. Any thermal mismatch between the material of a conical web and the material of coil 10 will cause greater thermally-induced stresses than would be the case if multiple discrete webs 30 were used.
  • the present invention is particularly advantageous when applied to shield coils which are structurally self-supporting, similar to the main coils of a serially-bonded magnet
  • the present invention may also be applied to shield coils formed within a journal 18, such as shown in Fig. 1 , or shield coils supported by a support tube, either in an A2-bonded arrangement or the alternative structure in which shield coils may be supported on a support tube by their radially inner surfaces, so-called A1- bonding, such as shown in Figs. 5B and 5C.
  • the annular partial oversleeve 32 may be formed by overbinding the coil 10 with resistive wire, for example of steel, aluminium or copper, and impregnating that wire structure with epoxy resin. This may be achieved either by winding the annular partial oversleeve over a completed structurally self-supporting magnet structure and impregnating the oversleeve, thereby bonding it onto the coil 10; or by winding the oversleeve over the coil windings prior to the impregnation step, followed by impregnating the coil and oversleeve in one step. In an alternative process, the partial oversleeve 32 may be formed separately from the main coils 10, raised to a temperature higher than that of the main coil 10, slid over the main coil 10 while at its higher temperature.
  • the oversleeve will grip onto the coil.
  • the material chosen for the oversleeve preferably has a greater coefficient of thermal expansion than the coil 10.
  • Example materials which may be used for the partial oversleeve include resin-impregnated materials such as glass fibre, aluminium wire, steel wire, copper wire. A combination of such materials may be employed to obtain desired thermal properties. The use of copper wire is attractive as it is thermally matched to typical superconducting wire.
  • the web 30 is preferably attached to partial oversleeve by an adhesive bond, for example using the resin used for impregnation.
  • threaded inserts may be included in the partial oversleeve, and the web may be bolted to these inserts.
  • Fig. 2 shows an example of modelled stresses in a structurally self-supporting main coil assembly 10 and shield coil 16, such as illustrated in Fig. 1 , carrying currents as if in use.
  • main coil assembly 10 and shield coil 16, such as illustrated in Fig. 1 , carrying currents as if in use.
  • no support structures are provided between the main coil assembly 10 and the shield coil 16.
  • the region of maximum stress in main coil 10 is labelled MX, and the region of minimum stress is labelled MN. A region of high stress is clearly shown.
  • Fig. 3 illustrates the results of simulation of an embodiment of the present invention, showing internal stresses in the same manner as used for Fig. 2.
  • both the main coil 10 and the shield coil 16 are formed as self- supporting structures, as in serially-bonded magnets.
  • the partial oversleeve 32 may be formed of materials similar to the material of the coils. This may be resin- impregnated glass fibre, resin-impregnated glass beads, or resin-impregnated overwound wire. Composite structures comprising combinations of resin, fibres such as glass fibre, wires, glass beads, may be found appropriate.
  • the web 30 is a cone of aluminium. As can clearly be seen in the figure, the region MX of maximum stress shown on Fig. 2 is relieved.
  • regions MX and MN of maximum and minimum stress, respectively, are shown in Fig. 3, the maximum level of stress encountered in the structure is moved, and reduced in value.
  • the maximum hoop stress encountered is reduced, typically by several tens of MPa, which could reduce the coil stress below that of the yield stress of the wire, thereby avoiding any plastic deformation of the wire.
  • Fig. 4 illustrates the results of simulation of another embodiment of the present invention, showing internal stresses in the same manner as used for Figs. 2-3.
  • This embodiment differs from the embodiment of Fig. 3 in that the intermediate coil support structure 31 comprises discrete aluminium webs 30 mounted onto a partial oversleeve 32 formed of resin-impregnated overwound copper wire.
  • the different material properties of the support structure mean that the resulting stresses are different from those of the embodiment of Fig. 3.
  • web 30 is bonded directly to the radially outer surface of a coil 10.
  • Stress relief may be provided to coil 10 at positions of bonding with web 20, by bracing coil 10 against shield coil 16.
  • Web 20 may comprise a cone, in which case stress relief may be provided circumferentially around main coil 10, or the web 30 may be intermittent, made up of discrete and separate parts, in which case stress relief is only provided to those parts where the web 30 is bonded to the coil 10.
  • the present invention provides a novel structure of main coils and shield coils in a superconducting electromagnet.
  • Intermediate support structure 31 provides the combined functions of supporting the shield coil and reducing the hoop stress in a main coil by using the shield coils to modify localised hoop stress in the main coil 10.
  • the web 30 is constructed of a metal in both of the specific examples described, it may be preferred to construct the webs from a composite material.
  • the webs may be glassfibre rods, for example constructed of resin- impregnated glassfibre cloth, chopped glassfibre or glass beads. These latter two options may be amenable to processing by injection moulding.
  • a fibre-reinforced composite structure may be devised in which optimised fibre lay-up provides optimised thermal and mechanical properties.
  • One or more ribs of another material may be enclosed within each web to increase stiffness of the resulting web. If a cloth material is used, the strength and rigidity of webs in any direction can be controlled by appropriately arranging the orientation of fibres in the cloth used.
  • the whole structure of self-supporting inncer coil assembly, self-supporting shield coil assembly and intermediate support structure may be formed in a single impregnation step, with all coils wound into a mould which are also provided with materials for forming the intermediate support structure, and the whole cavity impregnated in a single step to form a monolithic resin impregnated structure of inner coils, shield coils and intermediate support structure.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Agencement d'aimant supraconducteur, comprenant une structure magnétique structurellement autoporteuse consistant en des bobines principales annulaires (10) et des éléments d'espacement liés entre eux, un certain nombre de bobines de blindage (16) d'un diamètre supérieur à celui des bobines principales, placées de manière coaxiale par rapport aux bobines principales; et des structures de support de bobine intermédiaire (31) fixées à la structure magnétique autoporteuse des bobines principales annulaires (10) et aux bobines de blindage, pour retenir les bobines principales et de blindage dans leurs positions respectives correctes.
PCT/EP2012/072864 2012-01-05 2012-11-16 Aimant supraconducteur à structure autoporteuse WO2013102509A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1200120.2 2012-01-05
GB201200120A GB2503190A (en) 2012-01-05 2012-01-05 Structurally self-supporting superconducting magnet with support for shield coils

Publications (1)

Publication Number Publication Date
WO2013102509A1 true WO2013102509A1 (fr) 2013-07-11

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WO (1) WO2013102509A1 (fr)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2014118390A2 (fr) * 2013-02-04 2014-08-07 Siemens Plc Agencement de bobine magnétique supraconductrice
GB2519811A (en) * 2013-10-31 2015-05-06 Siemens Plc Superconducting magnet assembly
US10832856B2 (en) 2018-12-26 2020-11-10 General Electric Company Magnetic coil support in magnetic resonance imaging method and apparatus
GB2587378A (en) * 2019-09-26 2021-03-31 Siemens Healthcare Ltd Coil support
GB2587379A (en) * 2019-09-26 2021-03-31 Siemens Healthcare Ltd Support structure for a superconducting coil
CN114284027A (zh) * 2021-12-27 2022-04-05 中国科学院电工研究所 一种便携式传导冷却的高温超导磁体
US20220413069A1 (en) * 2021-06-29 2022-12-29 Siemens Healthcare Limited Superconducting Magnet for MRI System, and Processing Tool and Processing Method Therefor

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GB2528947B (en) 2014-08-07 2018-09-05 Siemens Healthcare Ltd Cylindrical superconducting magnet coil structure with methods of making and assembling it
GB2532314B (en) 2014-10-27 2018-05-02 Siemens Healthcare Ltd Support of superconducting coils for MRI systems
GB2561164B (en) 2017-03-30 2020-04-29 Siemens Healthcare Ltd Connection of coils to support structures in superconducting magnets
GB2579158B (en) * 2017-03-30 2021-02-10 Siemens Healthcare Ltd Connection of coils to support structures in superconducting magnets
CN107369519B (zh) * 2017-08-22 2023-07-25 广东电网有限责任公司电力科学研究院 一种超导限流器的线圈支撑紧固装置

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GB2480636A (en) * 2010-05-26 2011-11-30 Siemens Plc Solenoid magnet with coils and compression block spacers impregnated with resin.

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GB2437114A (en) * 2006-04-13 2007-10-17 Siemens Magnet Technology Ltd Resin impregnated coils and support structure for NMR type electromagnet and a method for its manufacture
GB2451515A (en) * 2007-08-03 2009-02-04 Siemens Magnet Technology Ltd A method of producing a former for winding a magnet coil and a method of producing a magnet coil
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014118390A2 (fr) * 2013-02-04 2014-08-07 Siemens Plc Agencement de bobine magnétique supraconductrice
WO2014118390A3 (fr) * 2013-02-04 2014-10-23 Siemens Plc Agencement de bobine magnétique supraconductrice
EP2951844B1 (fr) * 2013-02-04 2018-06-27 Siemens Healthcare Limited Agencement de bobine magnétique supraconductrice
US10365337B2 (en) 2013-02-04 2019-07-30 Siemens Healthcare Limited Superconducting magnet coil arrangement
GB2519811A (en) * 2013-10-31 2015-05-06 Siemens Plc Superconducting magnet assembly
US10832856B2 (en) 2018-12-26 2020-11-10 General Electric Company Magnetic coil support in magnetic resonance imaging method and apparatus
WO2021058162A1 (fr) 2019-09-26 2021-04-01 Siemens Healthcare Limited Support de bobine
GB2587379A (en) * 2019-09-26 2021-03-31 Siemens Healthcare Ltd Support structure for a superconducting coil
GB2587378A (en) * 2019-09-26 2021-03-31 Siemens Healthcare Ltd Coil support
GB2587378B (en) * 2019-09-26 2021-10-13 Siemens Healthcare Ltd Coil support
CN114450760A (zh) * 2019-09-26 2022-05-06 英国西门子医疗系统有限公司 线圈支承件
JP2022549413A (ja) * 2019-09-26 2022-11-25 シーメンス ヘルスケア リミテッド コイル支持体
JP7404517B2 (ja) 2019-09-26 2023-12-25 シーメンス ヘルスケア リミテッド コイル支持体
GB2587379B (en) * 2019-09-26 2024-05-29 Siemens Healthcare Ltd Support structure for a superconducting coil
US20220413069A1 (en) * 2021-06-29 2022-12-29 Siemens Healthcare Limited Superconducting Magnet for MRI System, and Processing Tool and Processing Method Therefor
US11841405B2 (en) * 2021-06-29 2023-12-12 Siemens Healthcare Gmbh Superconducting magnet for MRI system, and processing tool and processing method therefor
CN114284027A (zh) * 2021-12-27 2022-04-05 中国科学院电工研究所 一种便携式传导冷却的高温超导磁体
CN114284027B (zh) * 2021-12-27 2024-02-02 中国科学院电工研究所 一种便携式传导冷却的高温超导磁体

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GB201200120D0 (en) 2012-02-15

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