US3409852A - Electromagnet coil construction - Google Patents

Electromagnet coil construction Download PDF

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Publication number
US3409852A
US3409852A US542144A US54214466A US3409852A US 3409852 A US3409852 A US 3409852A US 542144 A US542144 A US 542144A US 54214466 A US54214466 A US 54214466A US 3409852 A US3409852 A US 3409852A
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Prior art keywords
coil
layer
receiving means
groove
sides
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Expired - Lifetime
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US542144A
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English (en)
Inventor
Uhlmann Helmut
Adam Georg
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Siemens AG
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Siemens AG
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/08—Deviation, concentration or focusing of the beam by electric or magnetic means
    • G21K1/093—Deviation, concentration or focusing of the beam by electric or magnetic means by magnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/202—Electromagnets for high magnetic field strength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
    • H02K44/08—Magnetohydrodynamic [MHD] generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
    • H02K44/08—Magnetohydrodynamic [MHD] generators
    • H02K44/16—Constructional details of the magnetic circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
    • H05H7/04—Magnet systems, e.g. undulators, wigglers; Energisation thereof
    • 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

  • Our invention relates in particular to electromagnet coils capable of providing magnetic fields which are not circumferentially symmetrical, such as, for example, longitudinally elongated transverse fields or quadrupole fields. Fields of this type are required for different technical and scientific purposes. Coils of this type are particularly useful in those cases where charged particles, such as, for example, ions, electrons and other elementary particles, are to be exposed to a transverse magnetic field, which is to say a magnetic field which extends perpendicularly with respect to the direction of movement of the particles. Such coils are therefore particularly required to act as direction-changing magnets for magnetohydrodynamic generators and particle accelerators.
  • a further object of our invention is to provide for winding layers of the coil a layer-receiving means which enables the coil to be continuously wound with wire which is maintained under tension during the winding of the layers and with the winding being carried out in such a way that lateral slipping of the wire during winding thereof is prevented.
  • the objects of our invention include the provision of a coil which can be manufactured with a conventional winding machine.
  • Our invention also includes the provision of a layerreceiving means which is capable of absorbing the forces which act on the coil windings and which result from the magnetic field encountered during operation of the coil. Particularly with superconductive coils these forces are especially great becauset of the strong magnetic field.
  • the electromagnet of our invention has an elongated coil provided with longitudinally extending parallel sides and curved ends of saddle-shaped configuration, with the coil composed of a plurality of winding layers located one adjacent the other with the windings of any one layer all having the same length and with the portions of the windings which extend along the sides of any one layer all being located in a common plane.
  • the coil of our invention further include-s a layer-receiving means defining a groove which receives the winding layers and which has elongated parallel sides and saddle-shaped ends conforming to the configuration of the winding layers.
  • FIG.1 is a schematic perspective illustration of one winding layer of a coil of our invention
  • FIG. 2 is a perspective illustration of a pair of layerreceiving means of our invention joined together to form an electromagnet coil;
  • FIG. 3 is a perspective illustration of a special embodiment of a layer-receiving means of our invention.
  • FIG. 4 is a fragmentary perspective illustration of the layer-receiving means of FIG. 3, the section of FIG. 4 being taken in a plane which extends perpendicularly with respect to the longitudinal sides of the coil;
  • FIG. 5 is a fragmentary perspective illustration of another embodiment of a layer-receiving means of our invention, the section of FIG. 5 also being taken in a plane which extends perpendicularly across the longitudinally extending sides of the coil;
  • FIG. 6 is a fragmentary perspective illustration of the winding layers, the section of FIG. 6 also being taken in a plane which extends transversely across the longitudinal sides of the coil and FIG. 6 schematically show ing the electrical connections for the coil;
  • FIG. 7 is a perspective illustration of a further embodiment of a coil according to our invention.
  • FIG. 8 is a fragmentary perspective illustration of yet another embodiment of a layer-receiving means of our invention, the section of FIG. 8 being taken in a plane which extends perpendicularly across the longitudinal sides of the coil;
  • FIG. 9 is a fragmentary perspective illustration of yet another embodiment of a layer-receiving means of our invention, the section of FIG. 9 also being taken in a plane which extends perpendicularly across the sides of the coil.
  • the configuration of a winding layer of the electromagnet coil of our invention can best be understood by visualizing an endless band of uniform width having opposed edges of uniform length, this band initially having the configuration of a cylinder and then being deformed in such a way that a pair of opposed portions of the band are turned into a common plane with the edges of the band portions which are in the common plane extending parallel to each other, so that the inner surfaces of the two turned band portions are situated on the same side of the plane.
  • FIG. 1 shows the pair of turned elongated band portions 1 and 2 which form the longitudinally extending sides of the coil, these band portions 1 and 2 extending parallel to each other in a common plane.
  • the electromagnet coil of our invent-ion is made up of two or more coil sections each having a pair of elongated sides, and these coil sections are arranged with their longitudinally extending sides engaging each other.
  • FIG. 2 shows a pair of layer-receiving means 21 and 22 which are connected together to form a coil according to our invention, the winding layers being omitted from FIG. 2 so as to show more clearly the details of the pair of interconnected layer-receiving means 21 and 22.
  • Each of these layer-receiving means has a pair of longitudinally extending sides which are parallel to each other and a pair of saddle-shaped opposed ends curved as illustrated in FIG. 2.
  • the interior space of the coil of our invention is, because of the curvature of the ends, accessible from the exterior in a direction which extends perpendicularly with respect to the magnetic field produced by the structure.
  • Each of the layer-receiving means 21 and 22 defines a groove which serves to receive the winding layers.
  • the groove of the layer-receiving means 22 is described below, and of course, the layer-receiving means 21 is formed with an identical groove which is directed toward the groove of the layer-receiving means 22.
  • the layer-receiving means 22 has an inner base surface 23 which defines the base of the layer-receiving groove and which has a configuration conforming to that of the band of FIG. 1.
  • the configuration of the base of the groove matches the configuration of the first winding layer.
  • the layer-receiving means 22 has a pairof side walls 24 and 25 which extend perpendicularly with respect to the base surface 23 along the entire length thereof, and it is these side walls 24 and 25 which have the inner side surfaces of the layer receiving means 22 which define the opposed side surfaces of the layer-receiving groove.
  • the groove of the layerreceiving means 21 is of the same configuration.
  • the individual winding layers are wound within the groove in such a way that the individual windings in any one layer all have the same length.
  • the side walls 24 and 25 thereof bulge outwardly, thus providing a widening of the coil body.
  • the individual winding layers of the coil each have their individual windings of equal length situated along the sides of the coil at a density which is difiierent from their density at the ends of the coil.
  • each layer-receiving means can be manufactured in a relatively easy way. The introduction of the windings can take place in a simple way by using a conventional winding machine.
  • the layer-receiving means of this embodiment includes a pair of side walls 31 and 32 which have inner surfaces defining the opposed inner side surfaces of the groove. These side walls are interconnected by a transverse wall 33 which has an inner surface defining the base surface of the groove. With this embodiment the outer side wall 31 and the inner side wall 32 extend perpendicularly with respect to the transverse wall 33 only along the elongated sides of the layer-receiving means.
  • the angle between the outer side wall 31 and the transverse wall 33 becomes smaller while the angle between the inner side wall 32 and the transverse wall 33 becomes greater.
  • the saddle-shaped ends of the layer-receiving means respectively have crests 34, and at this crest 34 the outer side wall 31 extends from the transverse wall 33 at an angle of from approximately 30 to 35 while the inner side wall 32 extends from the transverse wall 33 at the crest of each end at an angle of from approximately 150 to 145.
  • the total of both of these angles is 180".
  • the side walls of the layer receiving means extend substantially parallel to that part of the wall 33 which extends along each side of the layer-receiving means.
  • the configuration of the inner space defined by the walls 3133 is partially indicated in dotted lines.
  • the side walls 31 and 32 have a width which is more than twice their width along the sides of the layer-receiving means.
  • the configuration of the base of the groove corresponds to the configuration of the first winding layer of the coil of our invention.
  • the shape of the coil and thus the configuration of the groove of the layer-receiving means can be best illustrated by a paper model.
  • a plurality of endless paper strips all of the same width but each of a length somewhat greater than the next are joined together in a coextensive identically oriented manner with the strip of FIG. 1, this latter strip forming what corresponds to the first winding layer.
  • the additional strips will correspond to the additional layers of the coil.
  • the maximum field intensity is situated at the central plane of the coil, this central plane being defined by the free edges of the side walls 31 and 32 at the longitudinal sides thereof.
  • this central plane is defined by the free edges of one set of side walls, at the sides of the layerreceiving means which engage, respectively, the free edges of the other pair of side walls of the other layer-receiving means along the sides thereof.
  • Deviations above and below this central plane will provide field changes of approximately one percent.
  • the field changes resulting from deviations from the longitudinal axis of the coil within the central plane thereof are On the order of 2%. Because of these small deviations, it is possible to achieve with the coil of our invention magnetic fields having a high degree of homogeneity.
  • a coil according to our invention having windings which in cross section are provided along the sides of the coil not with the configuration of a rectangle but rather with the configuration of a rhombus.
  • the groove of a layer-receiving means which serves to receive the winding layers of such a coil has a corresponding configuration.
  • FIG. 5 shows such a layer-receiving means, and it will be seen that the groove of the layer-receiving means of FIG. 5 has indeed the configuration of a rhombus in cross section.
  • the outer wall 51 extends from the transverse wall 52 at an angle of approximately and the inner wall 53 extends from the trans verse wall at an angle of approximately 60.
  • the outer wall 51 extends from the transverse wall 52 at an angle which ranges from approximately 40 to 45
  • the inner wall 53 extends at the crest of each curved end portion from the transverse wall 52 at an angle ranging approximately from 140 to Thus, these angles also total 180.
  • the precise con figuration of the groove can be demonstrated by a model made up of paper strips in the same way as described above in connection with FIG. 3.
  • the strips are glued one to the other in such a way that the edges thereof conform to the surfaces which define the sides of the groove, while the base of the groove conforms to the con-figuration of the first strip.
  • the inner and outer side walls of the layer-receiving means extend approximately parallel to the transverse wall 52 at its portions which extend along the sides of the layer-receiving means.
  • angles between the base surface of the groove and the side surfaces thereof at the ends of the layerreceiving means of our invention can have different values, provided only that the windings received within the layerreceiving means all have the same length in any one layer, which is to say the configuration of the winding layer and the form of the groove correspond to the models referred to above and made from the joining together of the endless paper strips which define at their edges the surfaces corresponding to those of the groove.
  • each endless paper strip has opposed edges of the same length, as pointed out above.
  • FIG. 6 fragmentarily illustrates the winding layers of a coil of our invention without the layer-receiving means.
  • the coil is composed of several winding layers 61 which are formed in such a way that the individual winding 62 within any one layer all have the same length.
  • the wire ends 63 of the coil extend outwardly and are connected with a source of current 64.
  • the switch 65 serves to connect the source of current 64 into the circuit or to open the circuit.
  • there is an additional superconductive switch 66 for closing the superconducting circuit during superconductive operation.
  • a layer-receiving means which does not receive r the entire Winding layers, so that this layer-receiving means does not form a single endless groove.
  • the layer-receiving means only partially receives the winding layers, particularly at the curved end portions which are difiicult to shape.
  • the portions of the sides of the winding layers which extend between the sections of the layer-receiving means can be rigidly held together by pouring a mass about these portions of the winding layers in a suitable mold in which the mass solidifies so that thereafter the portions of the winding layers which extend beyond and between the sections of the layer-receiving means will remain rigid.
  • FIG. 7 A coil of our invention which includes such a layerreceiving means is illustrated in FIG. 7 where the layerreceiving means is composed of a pair of sections 71 and 72 which are separate and spaced from each other and which respectively receive the saddle-shaped ends 74 and 73 of the winding layers.
  • the longitudinal side portion 75 of the winding layers extend freely beyond the sections 71 and 72 of the layer-receiving means.
  • the ends 76 of the coil are directed outwardly to the side, as schematically indicated in FIG. 7.
  • the layer-receiving means When using superconductive wire for the windings of the coil, it is of advantage to give the layer-receiving means an exceedingly strong construction so that it will be able to absorb the mechanical forces encountered as a result of the exceedingly intense magnetic fields of superconductive coils.
  • the layer-receiving means need not have in this case the rail-like configuration, as has been chosen for illustration in FIGS. 2-5 for the sake of greater clarity. In this case it is preferred to make the layerreceiving means in the form of a massive metal member formed with a groove only for the purpose of receiving the winding layers and having in the longitudinal direction of the coil an elongated space provided for the particles which are introduced into the magnetic field.
  • the layer-receiving means can be connected to each other by screws.
  • FIGS. 8 and 9 show a pair of layer-receiving means having these features.
  • the layer-receiving means 81 of FIG. 8 is provided between its portions which are formed with the groove 82, which receives the winding layers, with a bridging wall '83 which considerably strengthens the structure and which defines part of an elongated passage or canal 84 over which the bridging wall 83 extends and in which the magnetic field is situated.
  • the outer wall of the layer-receiving means 81, which defines the outer surface of the groove 82, is fixed with lugs 85 which serve, in connection with suitable bolts, nuts and the like to fix the layer receiving means of FIG. 8 with another layer-receiving means providing an arrangement such as that shown in FIG. 2, for example.
  • the layer-receiving means 91 of FIG. 9 there is in addition to the bridging wall 92 between the sides of the groove 93 a reinforcing rib 94 which extends integrally from the bridging wall 92 as well as [from the transverse wall which defines the base of the groove 93.
  • the passage 95 is provided for the magnetic field.
  • the layer-receiving means of the invention it is desirable to use strong metal which can be readily worked.
  • the layer-receiving means in its final form can be derived from an aluminum casting.
  • the layer-receiving means from copper into which is milled the groove for receiving the winding layers.
  • the use of a material of good heat conductivity, such as aluminum of copper, for the layer-receiving means will facilitate cooling of the coil, particularly when superconductive coils are used.
  • the groove-defining side walls may be formed with additional openings which permit the entrance of a cooling medium to the coil windings.
  • the layer-receiving means formed from these metals can simultaneously serve with supercodu-ctive coils as shortcircuiting rings to prevent damaging of the coil during the transition between the superconducting and the normal conducting states.
  • niobium-zirconium wi-re As superconductive Wire for the coil it is possible to use, for example, niobium-zirconium wi-re. When using cables made up of several niobium-zirconium wire filaments housed within a plastic sleeve or envelope, the winding process is considerably simplified. It is also possible to use, for example, wires, bands or cables made of niobium-tin (Nb Sn), or layers of niobium-tin can be used.
  • Nb Sn niobium-tin
  • the layer-receiving means cannot be made of aluminum, inasmuch as this material has a melting point which is too low, and in this case copper will be used for the layerreceiving means.
  • the entire coil is situated in a cryostat in order to achieve the required low temperatures.
  • the magnet coils of our invention have many uses.
  • the magnet coil formed from two or more coil sections, according to our invention, which achieve a magnetic field whose maximum intensity is situated in the central plane of the coil, are particularly suitable for use with magnetohydrodynamic generators.
  • the coil is composed of two or more coil sections having their maximum field intensity beyond the central plane of the coil, the coil is suitable for use as a guiding magnet for the particle accelerator since the particles whose direction is to be changed often do not pass with such devices through the central plane of the coil.
  • the winding layers of the coil of our invention can be wound on conventional winding machines in which the wire is maintained under tension. Because all of the windings which in any one layer are of the same length are wound in a position where the pressure derived from a wire during its winding is always directed perpendicularly against the support beneath the wire, a lateral shifting of the wire during the winding of the layers is prevented.
  • the configuration of the cross section of the groove in the layer-receiving means of the coil of our invention will depend upon the form of the magnetic field which is to be achieved with the coil.
  • the side surfaces of the groove will have along the sides of the coil an angle of with respect to the base surface thereof. This angle can be maintained throughout the entire length of the groove or it may vary along the length of the groove, as pointed out above.
  • the depth of the groove which is to say the width of the side surfaces thereof, is selected in such a way that all of the winding layers will be received therein.
  • a coil comprising a plurality of winding layers located one adjacent the other with a plurality of windings forming each layer, all of the windings of any one layer being of the same length and each layer having a pair of elongated parallel sides and a pair of opposed ends respectively curved from said sides and having a saddle-shaped configuration, the winding portions which form the sides of any one layer all being located in a common plane, and a layer-receiving means defining a groove receiving said layers at least in part, said groove having saddle-shaped ends respectively receiving said ends of said layers and elongated sides respectively receiving said sides of said layers, and said layer-receiving means having an inner base surface of uniform width defining the base of said groove and a pair of opposed inner surfaces defining the sides of said groove and terminating in free edges which are located in a common plane along the sides of said groove.
  • a coil as recited in claim 1 and wherein said layerreceiving means has a pair of opposed groove walls respectively provided with said inner side surfaces of said groove, one of said groove walls being an outer wall and the other of said groove walls being an inner wall and said walls extending perpendicularly with respect to said base surface along the sides of said groove, said groove walls respectively having crests at each of the saddleshaped ends of said groove and said outer wall extending at each crest at an angle of less than 90 from the base surface of said groove while said inner wall extends at each crest from the base surface of the groove at an angle which when added to said angle of less than 90 totals 180.
  • said layerreceiving means includes a pair of spaced bodies respectively receiving said ends of said layers and said sides of said layers having portions which extend between said bodies.
  • a coil comprising a plurality of winding layers located one adjacent the other with a plurality of windings forming each layer, all of the windings of any one layer being of the same length and each layer having a pair of elongated parallel sides and a pair of opposed ends respectively curved from said side and having a saddle-shaped configuration, the winding portions which form the sides of any one layer all being located in a common plane, and a layer-receiving means defining a groove which receives said layers, said layer-receiving means having an inner base surface defining the base of said groove and a pair of opposed inner side surfaces defining the sides of said groove, and said layer-receiving means having an outer wall provided with one of said inner surfaces, an inner wall provided with the other of said inner side surfaces, and a bridging wall extending across the space between and interconnecting those portions of said inner wall which extend along the sides of said groove.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Particle Accelerators (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
US542144A 1965-04-17 1966-04-12 Electromagnet coil construction Expired - Lifetime US3409852A (en)

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US (1) US3409852A (xx)
AT (1) AT253049B (xx)
BE (1) BE678534A (xx)
CH (1) CH437529A (xx)
DE (1) DE1514445B2 (xx)
GB (1) GB1134515A (xx)
NL (1) NL6605156A (xx)
SE (1) SE335385B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411478A1 (fr) * 1977-12-12 1979-07-06 Euratom Bobine pour la production de champs magnetiques a homogeneite elevee ou tres elevee
EP0582193A1 (en) * 1992-07-28 1994-02-09 Mitsubishi Denki Kabushiki Kaisha Synchrotron radiation light-source apparatus and method of manufacturing same
US20160055951A1 (en) * 2014-08-19 2016-02-25 Tatsuya Kishi Electromagnet, tester and method of manufacturing magnetic memory
US20160077227A1 (en) * 2013-04-05 2016-03-17 Woodside Energy Technologies Pty Ltd. Magneto-hydrodynamic seismic source and a method of marine seismic surveying

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2752156B2 (ja) * 1989-05-30 1998-05-18 株式会社東芝 Ｍｒｉ装置用コイル部品の製造方法
JPH0719694B2 (ja) * 1990-08-07 1995-03-06 財団法人シップ・アンド・オーシャン財団 鞍型ダイポールコイル
DE102006009250A1 (de) 2005-04-20 2006-11-02 Siemens Ag Sattelförmige Spulenwicklung unter Verwendung von Supraleitern und Verfahren zu ihrer Herstellung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215871A (en) * 1961-12-26 1965-11-02 Allis Chalmers Mfg Co Structural features of mhd electrical power generator
US3270304A (en) * 1963-11-01 1966-08-30 Avco Corp Form for supporting saddle-shaped electrical coils
US3283276A (en) * 1963-07-25 1966-11-01 Avco Corp Twisted superconductive winding assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215871A (en) * 1961-12-26 1965-11-02 Allis Chalmers Mfg Co Structural features of mhd electrical power generator
US3283276A (en) * 1963-07-25 1966-11-01 Avco Corp Twisted superconductive winding assembly
US3270304A (en) * 1963-11-01 1966-08-30 Avco Corp Form for supporting saddle-shaped electrical coils

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411478A1 (fr) * 1977-12-12 1979-07-06 Euratom Bobine pour la production de champs magnetiques a homogeneite elevee ou tres elevee
US4231008A (en) * 1977-12-12 1980-10-28 European Atomic Energy Community Coil for the production of homogeneous magnetic fields
EP0582193A1 (en) * 1992-07-28 1994-02-09 Mitsubishi Denki Kabushiki Kaisha Synchrotron radiation light-source apparatus and method of manufacturing same
US5483129A (en) * 1992-07-28 1996-01-09 Mitsubishi Denki Kabushiki Kaisha Synchrotron radiation light-source apparatus and method of manufacturing same
US20160077227A1 (en) * 2013-04-05 2016-03-17 Woodside Energy Technologies Pty Ltd. Magneto-hydrodynamic seismic source and a method of marine seismic surveying
AU2014246662B2 (en) * 2013-04-05 2018-03-01 Woodside Energy Technologies Pty Ltd A magneto-hydrodynamic seismic source and a method of marine seismic surveying
US10001572B2 (en) * 2013-04-05 2018-06-19 Woodside Energy Technologies Pty Ltd. Magneto-hydrodynamic seismic source and a method of marine seismic surveying
US20160055951A1 (en) * 2014-08-19 2016-02-25 Tatsuya Kishi Electromagnet, tester and method of manufacturing magnetic memory
US9818523B2 (en) * 2014-08-19 2017-11-14 Toshiba Memory Corporation Electromagnet, tester and method of manufacturing magnetic memory

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Publication number Publication date
CH437529A (de) 1967-06-15
DE1514445A1 (de) 1970-09-24
BE678534A (xx) 1966-09-01
AT253049B (de) 1967-03-28
GB1134515A (en) 1968-11-27
SE335385B (xx) 1971-05-24
DE1514445B2 (de) 1971-03-11
NL6605156A (xx) 1966-10-18

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