US3731241A - Electrical coils for generating magnetic fields - Google Patents

Electrical coils for generating magnetic fields Download PDF

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Publication number
US3731241A
US3731241A US00071590A US3731241DA US3731241A US 3731241 A US3731241 A US 3731241A US 00071590 A US00071590 A US 00071590A US 3731241D A US3731241D A US 3731241DA US 3731241 A US3731241 A US 3731241A
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windings
coil
azimuthal
runs
magnetic field
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US00071590A
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J Coupland
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Science Research Council
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Science Research Council
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    • 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
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF 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
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • 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
    • 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
    • Y10S505/871—Magnetic lens
    • 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

  • ABSTRACT A novel approach to the mathematical analysis of the magnetic field produced by the coil windings of ac- 211 Appl. No.: 71,590
  • the invention relates to electrical coils for generating magnetic fields and more particularly to such coils for generating the magnetic fields for beam bending or beam focusing in charged particle accelerators.
  • Electrical coils for generating magnetic fields for beam bending or beam focusing in charged particle accelerators are constructed so as to approximate as closely as manufacturing difficulties will allow to the ideal situation described above. It will be appreciated that the cylinder cannot be infinitely long and, in practice, the windings are in the form of a coil, a winding running up the length of one side of the cylinder crossing over at an end to run back down the other side.
  • the winding thickness in practice is likely to be relatively small if a high field superconductor is used.
  • a high current density winding is particularly important for a multipole magnet in order to limit the volume of conductor required.
  • the present invention is based upon a novel approach in the mathematical analysis of the magnetic field generated by electric current in the windings from which it has been appreciated that considerable improvement in the field uniformity (or field purity in the case of magnetic quadrupole fields or fields of higher orders) may be achieved by the insertion of accurately located and dimensioned spacers within the coil windings.
  • the invention provides, in one of its aspects, an electrical coil for generating a magnetic field, of order N which coil is of the form in which the windings lie in a bundle between two parallel planes spaced apart, the windings lying in two side runs and two end runs where the windings cross from one side run to the other, the general direction of the lengths of the windings in the two side runs being parallel to the said two planes, the side runs being substantially longer than the end runs so that the magnetic field is principally defined by the side runs, the windings being arranged so that there is at least one region, but not more than 4N regions, each region being defined in cross-section by an area within each perimeter respectively of the bundle of windings as seen in cross-section in the two side runs, from which region the windings are absent, the number of windings per unit cross-sectional area in the side runs being substantially constant throughout the regions where windings are present, and the locationand extent of the region or regions where the windings are absent being selected to enhance
  • windings in the said two side runs are straight and parallel with one another.
  • the invention provides, in another of its aspects, an electrical coil for generating a magnetic field wherein the windings of the coil, as seen in cross-section, are distributed within boundaries defined by concentric circles and generally radially extending lines at the azimuthal limits of the coil windings, and wherein the windings are so arranged that there is at least one region defined by an area within the said boundaries as seen in cross-section, from which region the windings of the coil are absent, the location and extent of the region being selected to enhance the uniformity or purity of the magnetic field generated by the coil.
  • said area defining the region comprises a sector of the outer circular boundary truncated by the inner circular boundary.
  • the coil windings are divided by azimuthal spacers inserted in the windings, the spacers occupying the said regions as defined above.
  • the arrangement may comprise coil windings which, as seen in cross-section, are within boundaries defined by concentric circles, the azimuthal limits of the coil windings being at 67.40 in each quadrant measured from a reference axis, and spacers in each quadrant, the azimuthal extent of the spacers being from 43.50 to 52.60 measured from the reference axis, the coil windings being otherwise uniformly distributed within the boundaries.
  • the azimuthal limits of the coil windings may be derived by dividing by two the aforementioned angles for the dipole field coil.
  • the corresponding angles for a sextupole field of high purity may be derived by dividing by three the aforementioned angles for the dipole field coil, and so on for higher order fields.
  • the dipole field may be still further improved if the azimuthal limits of the coil windings are at 7l.8l in each quadrant measured from the reference axis with spacers from 33.3 8 to 37.l7 and from 53.l6 to 63.36".
  • FIGS. 1 to 3 are cross-sectional views of three forms of coil
  • FIG. 4 is a perspective view of a winding for a form of coil
  • FIG. 5 is a development showing a pattern of end winding of a coil
  • FIG. 6 is a section on line B-B of FIG. 5.
  • FIG. I is included for illustrating the principles of the mathematical analysis on which the present invention is based and shows windings of the form adopted by Asner and lselin as mentioned above for generating a quadrupole field.
  • FIGS. 1 to 3 the general form of the magnetic field is indicated by arrowed lines.
  • the reference R and associated arrows shows the extent of the bundle of windings 11 in one run of one of the coils. At the ends, the windings l I cross over into the other run, the extent of which is indicated by the reference S.
  • the perimeter or boundary of the bundle of windings in the run R, as seen in crosssection, is defined by an outer circle of radius r,,, an inner circle of radius r and radial lines at azimuthal locations defined by angle 0 equal to 60 and 90.
  • the run S has its boundaries defined by the same circles, but the azimuthal limits are at 0 0' and 0 30.
  • the other three coils are symmetrically arranged and the azimuthal extent of the coils is defined by the angle indicated as 2q5, where, in this case, 4: 30.
  • the four poles of the magnetic quadrupole field generated by passing electrical currents through the windings 11 in the senses indicated by the dots and crosses in the windings are located in the four pole gaps encompassed by the windings in each quadrant. Measured from the reference axis BOA, these pole gaps extend from 30 to 60 in each quadrant.
  • the windings of the coil in the first quadrant in FIG. 1 lie in a bundle between two parallel planes spaced apart.
  • the planes extend perpendicularly to the plane of the paper and contain the two lines respectively marked 12 and 13.
  • the FIG. 1 shows in cross-section the side runs R and S which extend perpendicularly to the plane of the paper a distance which is substantially greater than the length of the end runs where the windings cross over from side run S to side run R.
  • the ratio of the length of the side runs to the length of the end runs may be between :1 and 10: 1.
  • the current density j in a shell of thickness dr is Fourier analyzed into its angular components j cosnli, from which the vector potentials A, at a point (r, 0) may be calculated for points inside and outside the current shell using the formulas:
  • n The origin of 0 is chosen to exclude terms sin n6, and in the case of two-fold symmetry as is required for a quadrupole, n will take only the values 2, 6, 10, 14, or (4p 2) where p is an integer.
  • j the Fourier coefficients j are independent of radius as in the case of sectored coils as shown in FIG. 1, then simple integration of these radial expressions gives by superposition the combined effect for a thick coil of inner and outer radii r and r,,.
  • A is given by the following expressions, whence by the usual curl relations the components of field within the coil are obtained. These are necessary in considering the mechanical forces on the conductors and in the case of superconductors also in checking that the critical field is not exceeded for the current density in question.
  • the maximum usable aperture will probably be only 1.8 to 1.9 r,, due to an inner wall thickness for the windings, or even less if there has to be an annular space for a temperature transition 300 K to 4.2 K.
  • the maximum harmonic error at 0.8 r, of 1.2 percent due to C may be acceptable for a number of applications.
  • spacers 14 extend along the length of the runs of each coil and it can be seen that their general location is defined, in cross-section, by an area within each perimeter respectively of the bundle of windings 11 as seen in cross-section in the two side runs of each coil.
  • the parameters computed for the coil are an overall azimuthal half-length of 5 33.70 and an azimuthal space from 2l.75 to 26.30.
  • the field error from any of the harmonics is now less than 0.1 percent.
  • the manufacturing tolerance on the angular boundaries is correspondingly tighter. For example, a change of less than 0.05 in any of the boundaries is enough to reduce j,, to O.
  • the same coil proportions will be best for a uniform dipole field or for a sextupole magnet after scaling the angles by 2 or respectively. Whilst the quality of the sextupole field will be improved and is likely to be more than adequate, the quality of the dipole field will be correspondingly poorer due to the lower order attenuation of the harmonic terms.
  • FIG. 3 One side run 15 of the coil windings for forming pole 16 has an azimuthal extent from 6 0 to 0 7 1 .84.
  • the other side run 17 is symmetrically arranged in the second quadrant.
  • the other coil winding having runs 18 and 19 for forming pole 21 is similarly symmetrically arranged in the third and fourth quadrants.
  • Each run 15, 17, 18, 19 has an azimuthal spacer 22 from 33.33 to 37.12 as measured from the reference axis COD.
  • Each run l5, 17, 18, 19 also has an azimuthal spacer 23 from 53.14 to 63.38 measured from the reference axis COD.
  • the following'table III shows the harmonic components for the coil arranGement of FIG. 3:
  • FIG. 4 is a perspective view of one layer of windings for one half of a coil for a dipole field. Side runs corresponding to 15 and 17 of FIG. 3 can be seen, as indicated by references 15a and 17a in FIG. 4. An azimuthal space at 23a can also be seen. The figure is principally included, however, to illustrate the general form of the end windings 31 and 32.
  • the integral being taken along the beam paths through the magnet and parallel to the z axis.
  • FIG. 6 shows windings (the sectioned areas) similar to FIG. 3 for a dipole field, but with only one azimuthal space in each quadrant.
  • FIG. 5 is a development for showing in plan a typical improved end winding pattern, the figure showing only the windings in the quadrant marked A of FIG. 6. For the development, the windings are uncurled so that their curvature from 0 to 0 90 apparent in FIG. 6'is shown planar in FIG. 5.
  • FIG. shows part of the axial winding, B--B marking the section line of FIG. 6, and one quadrant of end winding.
  • the plan shows a scale of 0 from 0 to 90 for a quadrant of a dipole magnet (the scale would be 0 from 0 to 45 for a quadrupole magnet, etc.) and the other axis corresponds with the axial distance 2.
  • the conductors 33, 34, 35, 36, 37, 38 are arranged parallel to each other and having an inclination 4) to the z axis.
  • a 0cot' +L(0) Bcos0 where A and B are constants and L(0) is the axial length as shown (see FIG. 5) for conductor 38 only.
  • Suitable approximate values of iii are indicated in FIG. 5 for the various ranges of 0. However, does not need to be constant, or even the same at each 0 for all of the inclined conductors. If is not the same at'each 0 for all the conductors, the pattern will necessarily be more complex.
  • the self-magnetic field in the outer windings may be derived by differentiating the solutions, equation (1) above, and adding the various harmonic components. To this must be added terms of the type r"" cosn0 due to the decaying quadrupole field of the inner section. For the inner windings, the net field will be given in a similar way from equation (2) above plus the uniform field from the dipole winding. A separate treatment has to be applied to the end sections of the coil where field increases can also occur.
  • the choice of the dipole windings section as the outer section is helpful in improving the quality of the dipole field in the useful aperture and at the same time minimizing the dimensions of the quadrupole, so saving in winding material, especially as the field gradient B 9 r varies slowly as In (r,,/r,,).
  • the magnetic field depends directly upon the thickness of the winding (r, r,,) and consequently there is less incentive to minimize the mean radius.
  • a further advantage of the concentric arrangement is that it is easier to ensure that the two magnets are self-aligned to a common axis.
  • the side runs of the windings need not conform to the surface of a cylinder.
  • the arrangement may, for example, be such that, as seen in cross-section, the side runs of the windings are contained within rectangular boundaries.
  • the field uniformity or purity can similarly be enhanced by spacers of predetermined dimensions and locations.
  • the mathematical calculation of the parameters of the spacers is considerably more complex than that for the abovedescribed concentric arrangements.
  • windings may be formed from wide, thin tapes of superconductor, which may be braided.
  • An electrical coil for generating a magnetic field of order N which coil .is of the form in which the windings lie in a bundle'between two parallel planes spaced apart, the windings lying in two side runs and two end runs where the windingscross from one side run to the other, the general direction of the lengths of the windings in the two side runs being parallel to the said two planes, the side runs being substantially longer than the end runs so that the magnetic field is principally defined by the side runs, the windings being arranged so that there is at least one region, but not more than 4N regions, each region being defined in crosssection by an area within each perimeter respectively of the bundle of windings as seen in cross-section in the two side runs, from which region the windings are absent, the number of windings per unit cross-sectional area in the side runs being substantially constant throughout the regions where the windings are present, and the location and extent of the region or regions where the windings are absent being selected to enhance the uniformity or purity of the magnetic field generated by the coil.
  • An electrical coil for generating a magnetic field as claimed in claim 2 wherein the windings of the coil, as seen in cross-section, are distributed within boundaries defined by concentric circles and generally radially extending lines at the azimuthal limits of the coil windings, and wherein the said area defining the region from which the windings are absent is an area within the said boundaries as seen in cross-section.
  • the azimuthal limits of the coil windings, of which there are two in each quadrant defining four magnetic pole regions, are at 33.70 in each quadrant measured from mutually perpendicular reference axes, and the azimuthal extents of the spacers, of which there are two in each quadrant, are from 2l.75 to 26.30 measured from the reference axes.
  • An electrical coil for generating a magnetic field which coil is of the form in which the windings lie in a bundle between two parallel planes spaced apart, the windings lying in two side runs and two end runs where the windings cross from one side run to the other, the general direction of the lengths of the windings in the two side runs being parallel to the said two planes, the side runs being substantially longer than the end runs so that the magnetic field is principally defined by the side runs, the windings in the end runs being arranged so that for any length of winding of azimuthal location 6 and inclination d) to a z axis defined parallel to the said general direction of the lengths of the windings in the side runs, the following condition is satisfied:
  • a 0cot'+L(0) Bcos0 where A and B are constants and L(6) is the length of the winding continuing in the direction of the side run beyond an end plane, the said end plane being defined as containing the point of diversion from side run to end run of the winding for which L(9) is zero.

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  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
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  • Spectroscopy & Molecular Physics (AREA)
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US00071590A 1969-09-18 1970-09-11 Electrical coils for generating magnetic fields Expired - Lifetime US3731241A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889218A (en) * 1973-08-21 1975-06-10 Sony Corp Saddle shaped deflection coil
US3913042A (en) * 1973-02-19 1975-10-14 Philips Corp Deflection coil system for colour television
US3912182A (en) * 1973-08-21 1975-10-14 Sony Corp Apparatus for winding saddle-shaped deflection coil
US3968566A (en) * 1971-02-27 1976-07-13 Licentia Patent-Verwaltungs-G.M.B.H. Method of forming a deflection yoke system
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
US4039987A (en) * 1976-01-16 1977-08-02 U.S. Philips Corporation Color television display device
US4039989A (en) * 1976-01-23 1977-08-02 U.S. Philips Corporation Deflection system for a color television display tube
US4126842A (en) * 1976-08-12 1978-11-21 Gte Sylvania Incorporated Toroidal deflection winding for cathode ray tube having in-line guns, wide deflection angle and large screen
US4189693A (en) * 1977-12-28 1980-02-19 The United States Of America As Represented By The United States Department Of Energy Superconducting magnet
US4232253A (en) * 1977-12-23 1980-11-04 International Business Machines Corporation Distortion correction in electromagnetic deflection yokes
US4271585A (en) * 1977-12-28 1981-06-09 The United States Of America As Represented By The United States Department Of Energy Method of constructing a superconducting magnet
US4644168A (en) * 1984-05-14 1987-02-17 Imatron Inc. Electron beam deflecting magnet assembly for a scanning electron beam computed tomography scanner
DE4025760A1 (de) * 1989-08-22 1991-02-28 Sumitomo Electric Industries Dipolare spule vom satteltyp, die nur sechspolige anteile des magnetischen feldes beseitigt
FR2797994A1 (fr) * 1999-08-30 2001-03-02 Thomson Tubes & Displays Unite de deflexion pour tube a rayons cathodiques autoconvergents comportant des bobines de deviation verticales en forme de selle
FR2797993A1 (fr) * 1999-08-30 2001-03-02 Thomson Tubes & Displays Unite de deflexion pour tube a rayons cathodiques comportant des bobines de deviation verticales en forme de selle
WO2008044194A3 (en) * 2006-10-13 2008-06-12 Philips Intellectual Property Electron optical apparatus, x-ray emitting device and method of producing an electron beam
US20150125622A1 (en) * 2010-04-01 2015-05-07 The Trustees of Columbia University in HIe City of Systems and methods for high and ultra-high vacuum physical vapor deposition with in-situ magnetic field
EP2929552A4 (de) * 2012-12-06 2016-08-03 Advanced Magnet Lab Inc Verdrahtungsanordnungen und verfahren zur formung von rinnen in verdrahtungsanordnungen
US20160247615A1 (en) * 2015-02-13 2016-08-25 Particle Beam Lasers, Inc. Low Temperature Superconductor and Aligned High Temperature Superconductor Magnetic Dipole System and Method for Producing High Magnetic Fields

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DE2755357A1 (de) * 1977-12-12 1979-06-13 Euratom Spule zur erzeugung von magnetfeldern hoher und extrem hoher homogenitaet
DE3505281A1 (de) * 1985-02-15 1986-08-21 Siemens AG, 1000 Berlin und 8000 München Magnetfelderzeugende einrichtung
EP0193837B1 (de) * 1985-03-08 1990-05-02 Siemens Aktiengesellschaft Magnetfelderzeugende Einrichtung für eine Teilchenbeschleuniger-Anlage
DE3511282C1 (de) * 1985-03-28 1986-08-21 Brown, Boveri & Cie Ag, 6800 Mannheim Supraleitendes Magnetsystem fuer Teilchenbeschleuniger einer Synchrotron-Strahlungsquelle
DE3923456A1 (de) * 1989-07-15 1991-01-24 Bruker Analytische Messtechnik Supraleitende homogene hochfeldmagnetspule

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US3423706A (en) * 1966-10-28 1969-01-21 Atomic Energy Commission Multipole magnet having a sequentially shim stepped coil configuration
US3461410A (en) * 1967-08-21 1969-08-12 Atomic Energy Commission 2-n pole electromagnet for focusing charged particles
US3483493A (en) * 1963-07-27 1969-12-09 Siemens Ag Superconducting magnet coils

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US3483493A (en) * 1963-07-27 1969-12-09 Siemens Ag Superconducting magnet coils
US3423706A (en) * 1966-10-28 1969-01-21 Atomic Energy Commission Multipole magnet having a sequentially shim stepped coil configuration
US3461410A (en) * 1967-08-21 1969-08-12 Atomic Energy Commission 2-n pole electromagnet for focusing charged particles

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968566A (en) * 1971-02-27 1976-07-13 Licentia Patent-Verwaltungs-G.M.B.H. Method of forming a deflection yoke system
US3913042A (en) * 1973-02-19 1975-10-14 Philips Corp Deflection coil system for colour television
US3889218A (en) * 1973-08-21 1975-06-10 Sony Corp Saddle shaped deflection coil
US3912182A (en) * 1973-08-21 1975-10-14 Sony Corp Apparatus for winding saddle-shaped deflection coil
US4039987A (en) * 1976-01-16 1977-08-02 U.S. Philips Corporation Color television display device
US4039989A (en) * 1976-01-23 1977-08-02 U.S. Philips Corporation Deflection system for a color television display tube
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
US4126842A (en) * 1976-08-12 1978-11-21 Gte Sylvania Incorporated Toroidal deflection winding for cathode ray tube having in-line guns, wide deflection angle and large screen
US4232253A (en) * 1977-12-23 1980-11-04 International Business Machines Corporation Distortion correction in electromagnetic deflection yokes
US4189693A (en) * 1977-12-28 1980-02-19 The United States Of America As Represented By The United States Department Of Energy Superconducting magnet
US4271585A (en) * 1977-12-28 1981-06-09 The United States Of America As Represented By The United States Department Of Energy Method of constructing a superconducting magnet
US4644168A (en) * 1984-05-14 1987-02-17 Imatron Inc. Electron beam deflecting magnet assembly for a scanning electron beam computed tomography scanner
DE4025760A1 (de) * 1989-08-22 1991-02-28 Sumitomo Electric Industries Dipolare spule vom satteltyp, die nur sechspolige anteile des magnetischen feldes beseitigt
DE4025760C2 (de) * 1989-08-22 1998-09-17 Sumitomo Electric Industries Satteltyp-Dipolspule
FR2797994A1 (fr) * 1999-08-30 2001-03-02 Thomson Tubes & Displays Unite de deflexion pour tube a rayons cathodiques autoconvergents comportant des bobines de deviation verticales en forme de selle
FR2797993A1 (fr) * 1999-08-30 2001-03-02 Thomson Tubes & Displays Unite de deflexion pour tube a rayons cathodiques comportant des bobines de deviation verticales en forme de selle
EP1081738A1 (de) * 1999-08-30 2001-03-07 THOMSON TUBES & DISPLAYS S.A. Vertikalablenkungsspulenanordnung für Kathodenstrahlröhre
EP1081737A1 (de) * 1999-08-30 2001-03-07 THOMSON TUBES & DISPLAYS S.A. Ablenkungsanordnung für selbstkonvergierende Kathodenstrahlröhren mit sattelförmigen vertikalen Ablenkspulen
US6577053B1 (en) 1999-08-30 2003-06-10 Thomson Licensing S.A. Deflection coil having a winding window
US6690105B1 (en) 1999-08-30 2004-02-10 Thomson Licensing S.A. Deflection coil of a deflection yoke
WO2008044194A3 (en) * 2006-10-13 2008-06-12 Philips Intellectual Property Electron optical apparatus, x-ray emitting device and method of producing an electron beam
US20100020937A1 (en) * 2006-10-13 2010-01-28 Koninklijke Philips Electronics N.V. Electron optical apparatus, x-ray emitting device and method of producing an electron beam
US7839979B2 (en) 2006-10-13 2010-11-23 Koninklijke Philips Electronics N.V. Electron optical apparatus, X-ray emitting device and method of producing an electron beam
US20150125622A1 (en) * 2010-04-01 2015-05-07 The Trustees of Columbia University in HIe City of Systems and methods for high and ultra-high vacuum physical vapor deposition with in-situ magnetic field
EP2929552A4 (de) * 2012-12-06 2016-08-03 Advanced Magnet Lab Inc Verdrahtungsanordnungen und verfahren zur formung von rinnen in verdrahtungsanordnungen
US20160247615A1 (en) * 2015-02-13 2016-08-25 Particle Beam Lasers, Inc. Low Temperature Superconductor and Aligned High Temperature Superconductor Magnetic Dipole System and Method for Producing High Magnetic Fields
US9793036B2 (en) * 2015-02-13 2017-10-17 Particle Beam Lasers, Inc. Low temperature superconductor and aligned high temperature superconductor magnetic dipole system and method for producing high magnetic fields

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CH529430A (de) 1972-10-15
GB1329412A (en) 1973-09-05
DE2045978A1 (de) 1971-03-25

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