GB813840A - Improvements relating to electron discharge devices - Google Patents

Improvements relating to electron discharge devices

Info

Publication number
GB813840A
GB813840A GB37268/55A GB3726855A GB813840A GB 813840 A GB813840 A GB 813840A GB 37268/55 A GB37268/55 A GB 37268/55A GB 3726855 A GB3726855 A GB 3726855A GB 813840 A GB813840 A GB 813840A
Authority
GB
United Kingdom
Prior art keywords
cathode
electron
aperture
screen
shield
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
GB37268/55A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB813840A publication Critical patent/GB813840A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/029—Schematic arrangements for beam forming

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Microwave Tubes (AREA)

Abstract

813,840. Electron guns. GENERAL ELECTRIC CO. Dec. 29, 1955 [Jan. 12, 1955], No. 37268/55. Class 39(1). An electron gun, particularly for a travelling wave tube comprises a hollow cylindrical cathode 2 having a tapered conical end 4 which end is truncated to provide an aperture 5, an electron emissive coating 6 on at least part of the interior surface of the cathode, means such as heater wires 7 for heating the cathode, and an accelerating anode 15 having an aperture 17 aligned with the cathode aperture 5 so as to produce a hollow beam of electrons. As shown the heater wires 7 are embedded in refractory insulating material 9 in a heat conserving shield 8 and an apertured screen 18 is provided between the anode and the cathode to minimize electron emission from the external surface of the cathode, the opening 19 being slightly larger than the opening 5 to minimize heat conduction to the screen 18. The screen is operated at cathode potential. The electron beam is collimated by the field from a magnetic coil 24 which also co-operates with the cathode in producing a hollow beam. For this reason the shield 8 and cathode body are made of tantalum or of other metals which are non-magnetic at operating temperatures.
GB37268/55A 1955-01-12 1955-12-29 Improvements relating to electron discharge devices Expired GB813840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US481375A US2803772A (en) 1955-01-12 1955-01-12 Apparatus for producing a hollow electron beam

Publications (1)

Publication Number Publication Date
GB813840A true GB813840A (en) 1959-05-27

Family

ID=23911707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37268/55A Expired GB813840A (en) 1955-01-12 1955-12-29 Improvements relating to electron discharge devices

Country Status (3)

Country Link
US (1) US2803772A (en)
FR (1) FR1146654A (en)
GB (1) GB813840A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE571603A (en) * 1957-10-08
US3262003A (en) * 1962-05-25 1966-07-19 Martin Marietta Corp Perforated hollow cathode discharge device
CN103972005A (en) * 2014-05-22 2014-08-06 哈尔滨工业大学 Electronic beam collecting device for electronic gun

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2099846A (en) * 1930-06-14 1937-11-23 Farnsworth Television Inc Thermionic oscillograph
US2124401A (en) * 1932-05-30 1938-07-19 Gen Electric Cathode-ray tube
US2034572A (en) * 1933-08-16 1936-03-17 Gen Electric Electric lamp and method of producing light
US2038341A (en) * 1934-06-07 1936-04-21 Aeg Electron discharge device
US2632130A (en) * 1947-11-28 1953-03-17 Joseph F Hull High current density beam tube

Also Published As

Publication number Publication date
FR1146654A (en) 1957-11-14
US2803772A (en) 1957-08-20

Similar Documents

Publication Publication Date Title
GB982671A (en) Improvements in or relating to ion guns
GB891983A (en) Linear particle accelerator apparatus
US4707637A (en) Plasma-anode electron gun
US5109179A (en) Electron gun provided with a device producing a magnetic field in the neighborhood of a cathode
US3258633A (en) High density plasma generator
US3268648A (en) Apparatus for vaporizing materials by an electron beam
GB981743A (en) Improvements in electron guns
US3344298A (en) Flash x-ray tube with gas focusing of beam
GB813840A (en) Improvements relating to electron discharge devices
US2936394A (en) Electron gun
US2886725A (en) X-ray tubes
US2818528A (en) Electron discharge device
US2680825A (en) Traveling-wave amplifying tube
US3715625A (en) Plasma generator
US2842703A (en) Electron gun for beam-type tubes
GB1070529A (en) Electron gun
US2936393A (en) Low noise traveling-wave tube
JPS6318297B2 (en)
GB706186A (en) Improvements in or relating to betatrons
US3857014A (en) Electron beam generator
US3046442A (en) High perveance beam forming system
US3204096A (en) Apparatus for projecting an electron beam along a curved path having variable impedance
US3243640A (en) Space-charge neutralized electron gun
US3255376A (en) Low-noise electron guns
GB864272A (en) Electron gun