US3801942A - Electric magnet with superconductive windings - Google Patents

Electric magnet with superconductive windings Download PDF

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Publication number
US3801942A
US3801942A US00344216A US3801942DA US3801942A US 3801942 A US3801942 A US 3801942A US 00344216 A US00344216 A US 00344216A US 3801942D A US3801942D A US 3801942DA US 3801942 A US3801942 A US 3801942A
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winding
layers
coil
coolant
magnet
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US00344216A
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English (en)
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W Elsel
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Siemens AG
Siemens Corp
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Siemens Corp
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Priority claimed from DE19722214954 external-priority patent/DE2214954C3/de
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/879—Magnet or electromagnet

Definitions

  • a superconductive magnet coil having an elongated cylindrical dipole superconducting winding is supported on a carrier cylinder, the winding comprising two winding components shaped as cylinder segments [451 Apr. 2, 1974 which are symmetrical with respect to a plane of symmetry which goes through the longitudinal axis of the carrier cylinder and which is perpendicular to the magnetic field of the coil.
  • the winding components each consist of a plurality of superimposed winding layers each having axially extending sides approximately parallel to the longitudinal axis of the carrier cylinder and circumferentially extending winding heads, the mutually corresponding winding layers of these winding components cooperatively forming cylindrical layers.
  • On at least one side each of the winding layers has bare uninsulated surfaces contacting a liquid permeable layer through which a coolant can pass in axial, tangential and radial directions in such a manner that each winding layer can be wetted by the coolant on at least that side.
  • Support bars extend between the respective axially extending sides of the two winding components to support them circumferentially apart, and these bars have relatively large coolant passages formed in them and extending radially with respect to the coil winding from the liquid permeable layers to the outer periphery of the coil.
  • the winding components are held together and on the winding carrier cylinder by high-tensile strength wrappings and suitably shaped cores are positioned within the components windings, and smaller coolant passages are formed through these parts so as to extend radially from the liquid permeable layers to the outer coil periphery.
  • the magnet coil may be operated horizontally as well as vertically, immersed in a liquid coolant bath.
  • Such a superconductive magnet coil has an elongated cylindrical-dipole superconducting winding supported on a carrier cylinder, the winding comprising two winding components shaped as cylinder segments which are symmetrical with respect to a plane of symmetry which goes through the longitudinal axis of the carrier cylinder and which is perpendicular to the magnetic field of the coil.
  • the winding components each consist ofa plurality of superimposed winding layers each having axi-, ally extending sides approximately parallel to the longitudinal axis of the carrier cylinder and circumferentially extending winding heads, the mutually corresponding winding layers of these winding components cooperatively forming cylindrical layers.
  • Support bars may extend between the respective axially extending sides of the two winding components to support them circumferentially apart.
  • Thewinding components may be held together andon the winding carrier cylinder by wrappings and suitably shaped'cores may be positioned within the components windings.
  • the individual winding layers consist of ribbonshaped, so-called stabilized conductors in which wires of a high-field superconductive material, such as niobium-titanium or niobium-zirconium are embedded in a ribbon of metal such as copper or aluminum having high normal electrical conductivity at the operating temperature of the coil of about 4.2 Kelvin, and also high thermal conductivity.
  • a high-field superconductive material such as niobium-titanium or niobium-zirconium
  • Such conductors composed of superconductive material and electrically normal conductive metal must be adequately cooled so that the heat which is released in the normal conductive metal in the event of a possible transition of the super-conductive material to the normal conducting state, can be removed quickly and the conductor does not warm up above the transition temperature of the superconductive material.
  • the conductors are edge wound and adjacent to the winding layers, liquid coolant ducts are provided through which a liquid coolant can pass to contact edges of the ribbonshaped conductors at least on one side.
  • a superconducting magnet coil is positioned in liquid helium contained in the tank of a cryostat, this being called bath cooling because the coil is completely immersed'in the bath of liquid helium.
  • the liquid helium can get to the individual winding layers through the, coolant ducts but the latter have another function; namely, to remove helium vapor bubbles generated at the surface of the winding conductors from the interior of the coil as'quickly as possible.
  • the coolant ducts lead through the entire coil comprising the two components, in the axial direction of the carrier cylinder,'this requiring the coil to be built into the helium tank of the cryostat with the longitudinal axis of the carrier cylinder oriented vertically.
  • the helium vapor bubbles generated at the winding conductors with this vertical orientation can rise through what is in this case vertically extending coolant paths.
  • the coolant ducts are in the axial or lengthwise direction of the carrier cylinder exclusively.
  • the coolant can move also tangentially with respect to the coil, but in this case also the helium vapor bubbles can escape from the coil only in the axial direction.
  • An object of the present invention is to improve on the cooling of a superconducting magnet coil of the design or type referred to hereinabove, and, particularly,
  • the present invention involves the formation of coolant passages extending through the support and mounting elements of the described design or type of magnet coil. These passages extend radially with respect to the coil, to the latters outside which is exposed to the liquid coolant bath, and within the coil they connect with the coolant ducts through which the coolant passes to contact the edges of the ribbon-shaped conductors.
  • the coolant ducts through which the coolant can pass to contact the winding layers are in the form of cylindrical elements which encompass the conductor surfaces of the entire winding layers. These cylindrical coolant duct elements provide a uniform coolant supply to all parts of the winding layers including their winding heads.
  • support bars may extend between the axially extending sides of two of the winding components to support them circumferentially apart, and that the winding components may be mounted on the winding carrier cylinder by wrappings, and cores may be positioned within the components windings.
  • the bars having a series of relatively large holes formed through them to form portions of main radial coolant passages, which are completed by corresponding holes formed through the cylindrical duct elements and wrappings so the passages extend radially from the innermost cylindrical duct element to the coils outside without passing through the windings themselves.
  • These duct elements are constructed to be permeable in all directions to the coolant. Also, smaller holes are distributed throughout the cores with registering holes formed through the wrappings and duct elements.
  • the support bars are between the winding components horizontally extending winding portions which extend approximately parallel to each other and therefore are within or in the immediate vicinity of the previously referred to plane of symmetry of the magnet. Such bars permit simplified bracing of the winding layers of any two components against each other and permit simple fabrication of the radial coolant passages formed in them.
  • the innermost turns of the windings of the individual winding component layers are provided with the cores which function as fillers for what would otherwisebe empty space, and these cores are provided with radial coolant passages as .previously indicated.
  • wrappings of material of high tensile strength surround these shells and are provided with the openings for the coolant passages.
  • a cylindrical duct element is provided through which the liquid coolant can pass in all directions.
  • winding components axially or longitudinally extending sections are connected at their ends by the circumferentially extending portions which are re- 7 ferred' to herein as winding heads.
  • winding heads particularly high magnetic fields occur.
  • the coolant vapor bubbles generated at these winding heads largely rise vertically tangentially upwardly in the coolant ducts adjacent to the winding layers at those locations, and can escape from the winding heads to the outside through the relatively large coolant passages located within or in the immediate vicinity of the plane of symmetry.
  • the passages which extend through the support bars are made with a larger cross section that those at other locations, because these bars are located at the lowest and highest points of the magnet coil and therefore form the main discharge passages for the helium in vapor form as well as the main inlet passages for the liquid coolant.
  • FIG. 1 is a broken-away perspective view of a crosssectioned portion of this embodiment
  • FIG. 2 is a segment of the cross-sectioned end of FIG. 1, on an enlarged scale permitting details to be shown which cannot be seen in FIG. 1;
  • FIG. 3 shows an arrangement of winding layers such as might be used to produce a homogeneous magnetic field.
  • the dipole winding of the superconducting magnet coil shown in FIGS. 1 and 2 consist of two component windings, which, in turn, comprise two winding layers 1 and 2 in the case of one component winding and 3 and 4 in the case of the other.
  • the winding layer 1 is on top of the winding layer 2 and the winding layer-3 is on top of the winding layer 4.
  • the winding is positioned on a carrier cylinder 5 which at the same-time forms the inner wall of the liquid helium tank of the cryostat in which the coil is located, the outer wall of the cryostat comprising a.cylindrical tube 6 of large enough diameter to define a space for liquid helium betweenit and the outside of the coil.
  • the winding components are cylindrical segments, being almost semi-cylinders, with the innermost winding layers 2 and 4 fitting the contour of the carrier cylinder 5. All of the winding layers are wound with similar contours, illustrated in the case of the layer 1 by FIG. 1 where it is shown to comprise side portions 8 which extend substantially or approximately parallel to the longitudinal axis 7 of the carrier cylinder 5, and circumferentially extending winding heads 9.
  • the shape of the winding layer 2which is underneath the winding layer 1 is indicated by dashed lines in FIG. 1; and since it consists of more turns than the winding layer 1, it therefore has wider winding heads than the layer 1.
  • the two component windings are positioned symmetrically with respect to the plane of symmetry of the coil, as defined by the longitudinal axis 7 of the carrier cylinder 5 and the straight line 10 which is normal to the direction of the magnetic field produced by the coil, indicated by the arrow B.
  • the coil is positioned with the longitudinal axis 8 horizontal and the plane of symmetry defined by the straight lines 7 and 10, vertical. This has the advantages previously noted.
  • the winding layers 2 and 4 and the winding layers 1 and 3 jointly form cylinders.
  • a cylindrical coolant duct, or passage system, 11 is positioned, through which the liquid coolant can move in axial, tangential tern 11 is followed by the winding layers 2 and 4, each preferably wound from ribbon shaped stabilized conductors composed of high-field superconductive material and electrically normal conductive metal.
  • These ribbons are each wound with the ribbon edges facing the coolant-duct or passage system 11 bare and uninsulated so as to have direct contact with the coolant to obtain very effective heat transfer to the coolant.
  • a ribbon of insulating material may be wound between the interfacing sides of the conductor.
  • the two winding layers 24 are followed in a radial outward direction by a second coolant duct or passage system 12 having the characteristics of the layer 11 and around which is wound a wrapping 13 which may be,
  • support fittings 17 are interposed which may, for example, be made of hard fiber material in the form of the bars each having a series of axially interspaced coolant passages or holes 18 formed through them and which extend approximately in the plane of symmetry defined by the straight lines 7 and 10. These fittings or bars 17 are used at both the top and bottom of the coil.
  • the wrappings 13 and 16 and thecoolant duct system layers 12, 14 and 15 formed by the screens or mats, are all provided with coolant passages 19 in registration with the passages 18 of the fittings 17.
  • liquid coolant passages 18-l9 are formed which are open to the coolant duct system layer 11- at the latters surface, and edgewise with respect to the coolant duct system layers 12, 14 and 15, thepassages 18-19 extending to and opening from the outer periphery of the coil.
  • a core 2 0, made, for example, of hard fiber material, having radial coolant passages 21 is positioned between the innermost conductor turn of the winding side 8 and winding head 9 to support this innermost turn.
  • This core defines a substantially cylindrical segment to conform to the cylindrical contour of the coil.
  • a similar core is applied to the winding layer 3 and corresponding cores 20a are used for the same purpose in the case of the winding components 2 and 4, the passages 21 being registered radially through to the layer 11 insofar as they extend through both the cores 20 and 20a.
  • At least the wrappings 13 and 16 are provided with holes 22 in registration with the passages 21 and such holes may also be formed through the various coolant ducts.
  • liquid helium easily can get from the helium tank of the cryostat from below, via the lower coolant passages 18 and 19 into all of the cylindrical coolant all-directional ducts 11, 12, 14 and 15 and can spread out in these coolant ducts freely in the axial as well as in the tangential and radial directions over the entire coil areas.
  • Helium vapor bubbles generated in these coolant ducts can move upwardly, particularly in the region of the winding heads or ends 9 and can escape through the main discharge openings 18 in the fittings or spacer bars 17 situated on top.
  • the radial coolant passages 21 in the cores 20 offer further paths for a rapid escape of evaporated helium. Through these radial coolant passages 21, fresh liquid helium can furthermore again flow rapidly into the coil winding. Thereby, excellent cooling of the coil is assured with, at the same time, the highest operational safety.
  • the individual winding layers of the component coils can advantageously be prefabricated on a winding fixture and be solidified, for instance, by means of a suitable synthetic resin.
  • a suitable synthetic resin for instance, polymethyl methacrylate copolymer
  • the prefabricated winding layers 2 and 4 are put on and the cores of the windings are filled by fillers 20.
  • the fittings 17 or bars are then inserted in between the long sides of the winding layers.
  • the entire winding shell, including the winding heads or ends is wrapped under pretension on its entire outer area by means of the wrapping 13.
  • the further build-up proceeds according to the sequence which may be seen in FIGS. 1 and 2.
  • the individual winding layers are then advantageously electrically connected in series. It is advisable to arrange the coil or winding terminals in regions of low mechanical stress and a low magnetic field.
  • cryostat for the coil according to FIGS. 1 and 2 is preferably used a cryostat with a horizontally arranged, freely accessible interior space which is at room temperature.
  • cryostats which in addition have a turret-shaped extension for storing a supply of helium, are described, for instance, in the German Patents 1,501,304 and 1,501,319.
  • FIGS. 1 and 2 Only the helium tank 5, 6 and additionally in FIG. 1,-the inner tube 31 which encloses the freely accessible inner space 30 and is at room temperature, are shown in FIGS. 1 and 2.
  • the space betweenthe tubes 5 and 31 is evacuated for the purpose of thermal insulation.
  • a further vacuum jacket is provided on the outside of the outer tube 6 (not shown) of the helium tank.
  • nitrogen-cooled radiation shields and heat-insulating plastic foil can, for instance, further be arranged in a manner known per se. If the coil shown in FIGS. 1 and 2 is used for a magnetohydrodynamic generator, the plasma channel and the electrodes of the generator must be arranged in the space 30 inside the tube 31.
  • FIG. 3 is shown schematically how inside the car rier tube 5 a largerly homogeneous magnetic field can be achieved.
  • the carrier tube 5 is represented in FIG. 3 by a circle 40, and the outer limit of the winding by rent density within the shaded areas 44 and 45 defined by the circles 42 and 43. This can be accomplished by simulating the areas 44 and 45 by shell-like winding layers 47 to 51, as shown in FIG. 3 to the left of the plane of symmetry 46 and by providing the same curv rent density within the individual winding layers.
  • a homogeneous magnetic field of about 5 tesla can, for instance, be obtained in a free inner space of about 77 cm diameter.
  • the individual winding layers may, for instance, consist of copper strip 5 mm wide and 2 mm thick, inwhich a multiplicity of niobium-titanium wires of about 50 um thickness is embedded. Each-of the ten winding shells is then about 5 mm thick.
  • the current density in the winding is here about A/cm
  • the plastic mats serving as the coolant ducts may, for instance, be 1 mm thick each, and the wrappings, wound with epoxy resin-reinforced fiberglass tape, about 1 mm each.
  • the length of the coil can be about 4 meters.
  • the superconducting magnet coil construction according to this invention may be modified greatly from the example of the embodiment shown in detail.
  • One can, for instance, provide'a different number of winding layers, or provide between two winding layers a common, cylindrical coolant duct which is permeable axially'and tangentially.
  • mounting means such as wrappings need not be provided after every winding layer. Tubes which can be pushed over the windings are, moreover, suited as mounting means in lieu of 'wrappings.
  • the coolant ducts can also be worked into the walls of these tubes in a suitable manner.
  • each winding layer can be touched by the coolant stream and coolant canals leading radially outward are provided in support and mounting members, respectively
  • the carrier cylinder on which the winding is arranged may, for instance, also have an elliptic cross section.
  • the individual winding shells must then be fitted to this cross section.
  • the carrier cylinder is conically tapered or expanded from one end to the other. The coil winding can thereby be matched, for instance, to the shape of an expanding plasma channel inan MHD generator.
  • the superconducting magnet coil according to the invention is suited, besides for MHD generators, also for a number of other applications. It can, for instance, be used as a beam deflection magnet in particle accelerators or as a superconducting stator winding of an electric machine. Also, the conductors of the individual winding layers may not have'to be bent as sharply as is shown in FIG. 1. They can also run along the cylinder surface in a wider arc. The sharply bent winding heads, however, are suited particularly if the shortest possible structural length of the superconducting magnet coil is important.
  • winding comprising two winding components shaped as shells which are symmetrical with respect to a plane of symmetry which goes through the longitudinal axis of the carrier tube and which is perpendicular to the magnetic field of the coil, the winding components each comprising a plurality of superimposed winding layers each having axially extending sides approximately parallel to the longitudinal axis of the carrier cylinder and circumferentially extending winding heads, the mutually corresponding winding layers of these winding components cooperatively forming layers and having support members extending between their mutually adjacent axially extending sides, the coil having liquid coolant ducts through which liquid coolant can pass from the outside of the coil to contact at least one side of the winding layers in axial and circumferential directions; wherein the improvement comprises the formation of radial coolant passages extending through said support members and between said winding layers mutually adjacent axially extending sides and radially connecting said ducts with the outside periphery of said coil, said passages being free from said'winding components.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)
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US00344216A 1972-03-27 1973-03-23 Electric magnet with superconductive windings Expired - Lifetime US3801942A (en)

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DE19722214954 DE2214954C3 (de) 1972-03-27 Supraleitungsmagnetspule mit einer auf einem Trägerzylinder angeordneten, langgestreckten, zweipoligen Wicklung

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038622A (en) * 1976-04-13 1977-07-26 The United States Of America As Represented By The United States Energy Research And Development Administration Superconducting dipole electromagnet
US4363773A (en) * 1978-11-13 1982-12-14 Tokyo Shibaura Denki Kabushiki Kaisha Superconductive electromagnet apparatus
US4409579A (en) * 1982-07-09 1983-10-11 Clem John R Superconducting magnetic shielding apparatus and method
US4808954A (en) * 1987-05-26 1989-02-28 Kabushiki Kaisha Toshiba Superconducting coil apparatus
US4912443A (en) * 1989-02-06 1990-03-27 Westinghouse Electric Corp. Superconducting magnetic energy storage inductor and method of manufacture
US4912444A (en) * 1989-02-06 1990-03-27 Westinghouse Electric Corp. Superconducting solenoid coil structure with internal cryogenic coolant passages
US4920754A (en) * 1989-02-06 1990-05-01 Westinghouse Electric Corp. System for dumping cryogens in a superconducting solenoid installation
US5065496A (en) * 1989-06-01 1991-11-19 Westinghouse Electric Corp. Process for making a superconducting magnet coil assembly for particle accelerators
US5065497A (en) * 1989-06-01 1991-11-19 Westinghouse Electric Corp. Apparatus for making a superconducting magnet for particle accelerators
US5072516A (en) * 1989-06-01 1991-12-17 Westinghouse Electric Corp. Apparatus and process for making a superconducting magnet for particle accelerators
US5088184A (en) * 1989-06-01 1992-02-18 Westinghouse Electric Corp. Process for making a superconducting magnet for particle accelerators
US5098276A (en) * 1989-06-01 1992-03-24 Westinghouse Electric Corp. Apparatus for making a superconducting magnet for particle accelerators
US6163241A (en) * 1999-08-31 2000-12-19 Stupak, Jr.; Joseph J. Coil and method for magnetizing an article
US20060169931A1 (en) * 2005-01-28 2006-08-03 The Boeing Company Method and device for magnetic space radiation shield providing isotropic protection
US20070075273A1 (en) * 2005-09-16 2007-04-05 Denis Birgy Particle therapy procedure and device for focusing radiation
US20090084903A1 (en) * 2005-01-28 2009-04-02 The Boeing Company Spacecraft Having A Magnetic Space Radiation Shield
CN102866370A (zh) * 2011-07-06 2013-01-09 西门子(深圳)磁共振有限公司 超导磁体装置及磁共振成像系统
US20140159726A1 (en) * 2011-07-20 2014-06-12 Koninklijke Philips N.V. Helium vapor magnetic resonance magnet
US8809824B1 (en) * 2010-12-13 2014-08-19 The Boeing Company Cryogenically cooled radiation shield device and associated method
CN104183355A (zh) * 2013-11-12 2014-12-03 上海联影医疗科技有限公司 超导磁体系统以及屏蔽线圈组件
CN109950018A (zh) * 2019-03-06 2019-06-28 上海交通大学 一种调节无绝缘超导磁体匝间电阻的支撑骨架及使用方法
CN111081448A (zh) * 2018-10-22 2020-04-28 西门子医疗有限公司 用于低温应用的热总线
US10790078B2 (en) * 2017-10-16 2020-09-29 The Boeing Company Apparatus and method for magnetic field compression
US20210001729A1 (en) * 2018-07-23 2021-01-07 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting eddy-current brake for high-speed train
US11189410B2 (en) * 2018-07-23 2021-11-30 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting magnet for eddy-current braking for high-speed trains
US11271355B2 (en) 2017-10-16 2022-03-08 The Boeing Company Apparatus and method for generating a high power energy beam based laser

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JPS61174639U (enrdf_load_html_response) * 1985-04-19 1986-10-30

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US3416111A (en) * 1965-09-11 1968-12-10 Siemens Ag Superconductive spool with refrigerant-holding spool carrier
US3363207A (en) * 1966-09-19 1968-01-09 Atomic Energy Commission Usa Combined insulating and cryogen circulating means for a superconductive solenoid
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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038622A (en) * 1976-04-13 1977-07-26 The United States Of America As Represented By The United States Energy Research And Development Administration Superconducting dipole electromagnet
US4363773A (en) * 1978-11-13 1982-12-14 Tokyo Shibaura Denki Kabushiki Kaisha Superconductive electromagnet apparatus
US4409579A (en) * 1982-07-09 1983-10-11 Clem John R Superconducting magnetic shielding apparatus and method
US4808954A (en) * 1987-05-26 1989-02-28 Kabushiki Kaisha Toshiba Superconducting coil apparatus
US4912443A (en) * 1989-02-06 1990-03-27 Westinghouse Electric Corp. Superconducting magnetic energy storage inductor and method of manufacture
US4912444A (en) * 1989-02-06 1990-03-27 Westinghouse Electric Corp. Superconducting solenoid coil structure with internal cryogenic coolant passages
US4920754A (en) * 1989-02-06 1990-05-01 Westinghouse Electric Corp. System for dumping cryogens in a superconducting solenoid installation
US5065496A (en) * 1989-06-01 1991-11-19 Westinghouse Electric Corp. Process for making a superconducting magnet coil assembly for particle accelerators
US5065497A (en) * 1989-06-01 1991-11-19 Westinghouse Electric Corp. Apparatus for making a superconducting magnet for particle accelerators
US5072516A (en) * 1989-06-01 1991-12-17 Westinghouse Electric Corp. Apparatus and process for making a superconducting magnet for particle accelerators
US5088184A (en) * 1989-06-01 1992-02-18 Westinghouse Electric Corp. Process for making a superconducting magnet for particle accelerators
US5098276A (en) * 1989-06-01 1992-03-24 Westinghouse Electric Corp. Apparatus for making a superconducting magnet for particle accelerators
US6163241A (en) * 1999-08-31 2000-12-19 Stupak, Jr.; Joseph J. Coil and method for magnetizing an article
US8210481B2 (en) 2005-01-28 2012-07-03 The Boeing Company Spacecraft having a magnetic space radiation shield
US7484691B2 (en) 2005-01-28 2009-02-03 The Boeing Company Method and device for magnetic space radiation shield providing isotropic protection
US20090084903A1 (en) * 2005-01-28 2009-04-02 The Boeing Company Spacecraft Having A Magnetic Space Radiation Shield
US20060169931A1 (en) * 2005-01-28 2006-08-03 The Boeing Company Method and device for magnetic space radiation shield providing isotropic protection
EP1739016A1 (en) * 2005-06-30 2007-01-03 The Boeing Company Method and device for magnetic space radiation shield providing isotropic protection
US20070075273A1 (en) * 2005-09-16 2007-04-05 Denis Birgy Particle therapy procedure and device for focusing radiation
US8809824B1 (en) * 2010-12-13 2014-08-19 The Boeing Company Cryogenically cooled radiation shield device and associated method
US9090360B2 (en) * 2010-12-13 2015-07-28 The Boeing Company Cryogenically cooled radiation shield device and associated method
US20150144739A1 (en) * 2010-12-13 2015-05-28 The Boeing Company Cryogenically cooled radiation shield device and associated method
US8996084B2 (en) * 2011-07-06 2015-03-31 Siemens Plc Superconducting magnet device and magnetic resonance imaging system
US20130190186A1 (en) * 2011-07-06 2013-07-25 Xian Xi Chen Superconducting magnet device and magnetic resonance imaging system
CN102866370A (zh) * 2011-07-06 2013-01-09 西门子(深圳)磁共振有限公司 超导磁体装置及磁共振成像系统
US20140159726A1 (en) * 2011-07-20 2014-06-12 Koninklijke Philips N.V. Helium vapor magnetic resonance magnet
US9575150B2 (en) * 2011-07-20 2017-02-21 Koninklijke Philips N.V. Helium vapor magnetic resonance magnet
CN104183355A (zh) * 2013-11-12 2014-12-03 上海联影医疗科技有限公司 超导磁体系统以及屏蔽线圈组件
US10790078B2 (en) * 2017-10-16 2020-09-29 The Boeing Company Apparatus and method for magnetic field compression
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US11189410B2 (en) * 2018-07-23 2021-11-30 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting magnet for eddy-current braking for high-speed trains
US20210001729A1 (en) * 2018-07-23 2021-01-07 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting eddy-current brake for high-speed train
US11904729B2 (en) * 2018-07-23 2024-02-20 Hefei Institutes Of Physical Science, Chinese Academy Of Sciences Superconducting eddy-current brake for high- speed train
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CN111081448B (zh) * 2018-10-22 2022-06-10 西门子医疗有限公司 用于低温应用的热总线
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CN109950018A (zh) * 2019-03-06 2019-06-28 上海交通大学 一种调节无绝缘超导磁体匝间电阻的支撑骨架及使用方法

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