GB1039576A - Improvements in or relating to permanent magnet systems - Google Patents

Improvements in or relating to permanent magnet systems

Info

Publication number
GB1039576A
GB1039576A GB38914/63A GB3891463A GB1039576A GB 1039576 A GB1039576 A GB 1039576A GB 38914/63 A GB38914/63 A GB 38914/63A GB 3891463 A GB3891463 A GB 3891463A GB 1039576 A GB1039576 A GB 1039576A
Authority
GB
United Kingdom
Prior art keywords
axis
magnets
elements
radially
magnetized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB38914/63A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB1039576A publication Critical patent/GB1039576A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Particle Accelerators (AREA)
  • Microwave Tubes (AREA)

Abstract

1,039,576. Travelling-wave tubes. SIEMENS & HALSKE A.G. Oct. 3, 1963 [Oct. 4, 1962], No. 38914/63. Heading H1D. A permanent magnetsystem for producing a substantially homogeneous magnetic field along the longitudinal axis of the system includes a plurality of magnet elements 2 which are permanently magnetized radially in relation to the axis, and which have a radial dimension which increases continuously or in a plurality of steps in both directions as their distance along the axis from the centre of the system increases and which are magnetized in opposite senses on opposite sides of the centre. Elements 2 are rings contained in a soft iron tube 1. In an alternative embodiment, Figs. 3, 4 (not shown), radially disposed bar magnets are used instead of rings, the bar magnets being disposed in star fashion round the system axis, their outer poles contacting soft iron bridges 9. In a further embodiment, Fig. 5 (not shown), the two magnets at the ends of the system are supplemented by extra radially magnetized magnets which cover the energy requirements of the leakage flux. The elements may be stepped on the outside of the system.
GB38914/63A 1962-10-04 1963-10-03 Improvements in or relating to permanent magnet systems Expired GB1039576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES81889A DE1298646B (en) 1962-10-04 1962-10-04 Permanent magnetic focusing system for generating an at least approximately homogeneous magnetic field for the bundled guidance of an electron beam over a larger distance, especially for traveling wave tubes

Publications (1)

Publication Number Publication Date
GB1039576A true GB1039576A (en) 1966-08-17

Family

ID=7509982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38914/63A Expired GB1039576A (en) 1962-10-04 1963-10-03 Improvements in or relating to permanent magnet systems

Country Status (6)

Country Link
US (1) US3237059A (en)
DE (1) DE1298646B (en)
DK (1) DK103681C (en)
GB (1) GB1039576A (en)
NL (2) NL298777A (en)
SE (1) SE319241B (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1491444B2 (en) * 1965-01-26 1972-04-06 Siemens AG, 1000 Berlin u 8000 München PERMANENT MAGNET SYSTEM FOR GENERATING A SIGNIFICANTLY HOMOGENOUS MAGNETIC FIELD FOR CONCENTRATED GUIDANCE OF AN ELECTRON BEAM OVER A LONGER DISTANCE, IN PARTICULAR FOR WALKING FIELD TUBES
US3686527A (en) * 1969-12-12 1972-08-22 Sanders Associates Inc High-speed synthesized field focus coil
US4433270A (en) * 1980-01-28 1984-02-21 Drozdov Sergei S Reversible periodic magnetic focusing system
US4720692A (en) * 1984-10-24 1988-01-19 The United States Of America As Represented By The Secretary Of The Air Force Long, narrow, uniform magnetic field apparatus and method
US4647887A (en) * 1984-12-24 1987-03-03 The United States Of America As Represented By The Secretary Of The Army Lightweight cladding for magnetic circuits
US4614930A (en) * 1985-03-25 1986-09-30 General Electric Company Radially magnetized cylindrical magnet
DE3518852A1 (en) * 1985-05-23 1986-11-27 Siemens AG, 1000 Berlin und 8000 München MAGNET OF A CORE MIRROR TOMOGRAPH
US4658228A (en) * 1986-05-01 1987-04-14 The United States Of America As Represented By The Secreatry Of The Army Confinement of longitudinal, axially symmetric, magnetic fields to annular regions with permanent magnets
US4654618A (en) * 1986-05-01 1987-03-31 The United States Of America As Represented By The Secretary Of The Army Confinement of kOe magnetic fields to very small areas in miniature devices
US4701737A (en) * 1986-05-30 1987-10-20 The United States Of America As Represented By The Secretary Of The Army Leakage-free, linearly varying axial permanent magnet field source
FR2605451B1 (en) * 1986-10-17 1993-12-24 Thomson Cgr PERMANENT CYLINDRICAL MAGNET WITH LONGITUDINAL INDUCED FIELD
FR2605452B1 (en) * 1986-10-17 1988-12-02 Thomson Cgr SPHERICAL PERMANENT MAGNET WITH EQUATORIAL ACCESS
FR2605450B1 (en) * 1986-10-17 1988-12-02 Thomson Cgr CYLINDRICAL PERMANENT MAGNET FOR PRODUCING A UNIFORM AND TRANSVERSE INDUCTION FIELD
US4953555A (en) * 1987-10-20 1990-09-04 The United States Of Americas As Represented By The Secretary Of The Army Permanent magnet structure for a nuclear magnetic resonance imager for medical diagnostics
JP2826895B2 (en) * 1990-09-19 1998-11-18 ティーディーケイ株式会社 Permanent magnet magnetic circuit
US5319339A (en) * 1993-03-08 1994-06-07 The United States Of America As Represented By The Secretary Of The Army Tubular structure having transverse magnetic field with gradient
DE4424230C2 (en) * 1994-07-09 1996-08-14 Karlsruhe Forschzent Magnet system for gyrotrons
US5576679A (en) * 1994-10-25 1996-11-19 Shin-Etsu Chemical Co., Ltd. Cylindrical permanent magnet unit suitable for gyrotron
US5786741A (en) * 1995-12-21 1998-07-28 Aura Systems, Inc. Polygon magnet structure for voice coil actuator
US5929732A (en) * 1997-04-17 1999-07-27 Lockheed Martin Corporation Apparatus and method for amplifying a magnetic beam
KR100682661B1 (en) * 2005-09-13 2007-02-15 엘지전자 주식회사 Motor, and washing machine comprising the same
US8179220B2 (en) * 2008-05-28 2012-05-15 Otto Voegeli Confined field magnet system and method
CN105047355A (en) * 2015-08-12 2015-11-11 中国科学院电工研究所 Cylindrical permanent magnet system for focusing and guiding electron beam
US11448715B2 (en) * 2018-09-03 2022-09-20 Singapore University Of Technology And Design Permanent magnet system and method of forming thereof
US11875937B2 (en) * 2018-11-29 2024-01-16 Epsitau Ltd. Lightweight asymmetric array of magnet elements
RU206633U1 (en) * 2020-01-28 2021-09-20 Акционерное общество "Научно-производственное предприятие "Исток" имени А.И. Шокина" (АО "НПП "Исток" им. Шокина") MAGNETIC FOCUSING SYSTEM

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE725473C (en) * 1935-07-23 1942-10-08 Fernseh Gmbh Electron collecting coil
FR1105964A (en) * 1954-06-03 1955-12-09 Csf Improvement with permanent magnets
NL214979A (en) * 1956-03-01

Also Published As

Publication number Publication date
NL298777A (en) 1900-01-01
NL133615C (en)
SE319241B (en) 1970-01-12
US3237059A (en) 1966-02-22
DK103681C (en) 1966-02-07
DE1298646B (en) 1969-07-03

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