GB1030419A - Focussing system - Google Patents

Focussing system

Info

Publication number
GB1030419A
GB1030419A GB927763A GB927763A GB1030419A GB 1030419 A GB1030419 A GB 1030419A GB 927763 A GB927763 A GB 927763A GB 927763 A GB927763 A GB 927763A GB 1030419 A GB1030419 A GB 1030419A
Authority
GB
United Kingdom
Prior art keywords
magnets
march
magnet
focusing system
travelling
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
GB927763A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1030419A publication Critical patent/GB1030419A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only
    • 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
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing

Landscapes

  • Microwave Tubes (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

1,030,419. Travelling wave tubes. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. March 8, 1963 [March 17, 1962], No. 9277/63. Heading H1D. A periodic magnetic focusing system comprises a plurality of axially magnetized ring magnets 1, 2, of alternate polarity associated with polepieces 3, 7. Hollow conductors 4, 5 are adapted to supply high-frequency energy to a travelling-wave tube within the focusing system. Radially magnetized magnets 10 are arranged adjacent to the conductors, a further polepiece 8 being positioned within each magnet 10. Annular discs 9 serve as magnetic shunts. Yokes 11 connect the magnets 10 with the nearest axially magnetized magnet.
GB927763A 1962-03-17 1963-03-08 Focussing system Expired GB1030419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1962T0021769 DE1277449B (en) 1962-03-17 1962-03-17 Magnetic focusing arrangement for the bundled guidance of an electron beam, especially for traveling wave tubes

Publications (1)

Publication Number Publication Date
GB1030419A true GB1030419A (en) 1966-05-25

Family

ID=7550255

Family Applications (1)

Application Number Title Priority Date Filing Date
GB927763A Expired GB1030419A (en) 1962-03-17 1963-03-08 Focussing system

Country Status (2)

Country Link
DE (1) DE1277449B (en)
GB (1) GB1030419A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328232A1 (en) * 1993-08-21 1995-02-23 Licentia Gmbh Electron-beam tube (cathode-ray tube), in particular travelling-wave tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945153A (en) * 1956-08-31 1960-07-12 Rca Corp Electron beam tube
US2991382A (en) * 1958-03-20 1961-07-04 Nippon Electric Co Electron beam tube focusing device
US3001094A (en) * 1959-01-14 1961-09-19 Nippon Electric Co Magnetic focusing device

Also Published As

Publication number Publication date
DE1277449B (en) 1968-09-12

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