GB1286193A - Linear beam tube with plural cathode beamlets providing a convergent electron stream - Google Patents

Linear beam tube with plural cathode beamlets providing a convergent electron stream

Info

Publication number
GB1286193A
GB1286193A GB6876/70A GB687670A GB1286193A GB 1286193 A GB1286193 A GB 1286193A GB 6876/70 A GB6876/70 A GB 6876/70A GB 687670 A GB687670 A GB 687670A GB 1286193 A GB1286193 A GB 1286193A
Authority
GB
United Kingdom
Prior art keywords
grid
cathode
beamlets
providing
cooled
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
GB6876/70A
Inventor
George Valentine Miram
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1286193A publication Critical patent/GB1286193A/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
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam

Abstract

1286193 Beam discharge tubes VARIAN ASSOCIATES 12 Feb 1970 [16 June 1969] 6876/70 Addition to 1191755 Heading HID An electron gun comprising a concave cathode 2 with a plurality of concave emissive surfaces 6 each aligned with an aperture in an adjacent control grid 7, as described in the parent Specification, is characterized by the provision of a second grid 66 aligned with the first grid and disposed in recesses 67 in the cathode. The grid 66 may be coated with electron emission inhibiting material such as carbon, zirconium, iridium or titanium, and prevents emission from the underlying areas of the cathode, especially when the cathode is a dispenser cathode. The grid may be at the same potential as the cathode and may be cooled through a tubular metal support 68 which is preferably cooled and which is insulated by heat shields 71. In Fig. 1 the grid 66 is spaced from the recesses 67, but in a modification (Figs. 3 and 4, not shown) the grid is brazed to the bottom of each recess and the cooled support 68 is omitted. The gun may be used in the tubes described in the parent Specification.
GB6876/70A 1969-06-16 1970-02-12 Linear beam tube with plural cathode beamlets providing a convergent electron stream Expired GB1286193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83349069A 1969-06-16 1969-06-16

Publications (1)

Publication Number Publication Date
GB1286193A true GB1286193A (en) 1972-08-23

Family

ID=25264556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6876/70A Expired GB1286193A (en) 1969-06-16 1970-02-12 Linear beam tube with plural cathode beamlets providing a convergent electron stream

Country Status (4)

Country Link
US (1) US3558967A (en)
JP (1) JPS5512698B1 (en)
DE (1) DE1963389C3 (en)
GB (1) GB1286193A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113808896A (en) * 2021-09-16 2021-12-17 中国科学院高能物理研究所 Shadow mask assembly and electron gun

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582070A (en) * 1968-04-26 1969-09-26
FR2030536A6 (en) * 1969-07-29 1970-11-13 Cit Alcatel
US3805106A (en) * 1969-12-18 1974-04-16 Gen Electric Electrostatic fly{40 s eye lens
FR2082304A5 (en) * 1970-03-10 1971-12-10 Thomson Csf
US3688145A (en) * 1970-10-08 1972-08-29 Donald K Coles Light detector having wedge-shaped photocathode and accelerating grid structure
US3983446A (en) * 1971-07-06 1976-09-28 Varian Associates Gridded convergent flow electron gun for linear beam tubes
DE2210160C3 (en) * 1972-03-02 1975-04-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electron gun system for time-of-flight tubes
US3783327A (en) * 1972-06-30 1974-01-01 Rca Corp Filamentary cathode mount and mounting method
US3843902A (en) * 1972-08-24 1974-10-22 Varian Associates Gridded convergent flow electron gun
IL43254A (en) * 1972-09-28 1976-02-29 Varian Ass Ciates Gridded electron gun employing a concave cathode emitter
US3852633A (en) * 1972-12-13 1974-12-03 Varian Associates Gridded electron gun
US3818260A (en) * 1973-03-05 1974-06-18 Sperry Rand Corp Electron gun with masked cathode and non-intercepting control grid
DE2449796C3 (en) * 1974-10-19 1980-03-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Supply cathode for a grid-controlled electron tube and process for their manufacture
US3999097A (en) * 1975-06-30 1976-12-21 International Business Machines Corporation Ion implantation apparatus utilizing multiple aperture source plate and single aperture accel-decel system
US4023061A (en) * 1976-01-19 1977-05-10 Varian Associates Dual mode gridded gun
US4038602A (en) * 1976-02-25 1977-07-26 The United States Of America As Represented By The Secretary Of The Navy Automodulated realtivistic electron beam microwave source
US4321505A (en) * 1978-07-24 1982-03-23 Varian Associates, Inc. Zero-bias gridded gun
US4583021A (en) * 1983-04-18 1986-04-15 Litton Systems, Inc. Electron gun with improved cathode and shadow grid configuration
US5227701A (en) * 1988-05-18 1993-07-13 Mcintyre Peter M Gigatron microwave amplifier
US5029259A (en) * 1988-08-04 1991-07-02 Mitsubishi Denki Kabushiki Kaisha Microwave electron gun
FR2693028A1 (en) * 1992-06-26 1993-12-31 Thomson Tubes Electroniques Electron gun with reduced heating of the grid.
WO1997038436A1 (en) * 1996-04-08 1997-10-16 The Board Of Trustees Of The Leland Stanford Junior University Single-beam and multiple-beam klystrons using periodic permanent magnets for electron beam focusing
US7062017B1 (en) * 2000-08-15 2006-06-13 Varian Medical Syatems, Inc. Integral cathode
US6528799B1 (en) * 2000-10-20 2003-03-04 Lucent Technologies, Inc. Device and method for suppressing space charge induced aberrations in charged-particle projection lithography systems
US7978804B2 (en) * 2007-12-10 2011-07-12 Schlumberger Technology Corporation Low power neutron generators
US7924983B2 (en) * 2008-06-30 2011-04-12 Varian Medical Systems, Inc. Thermionic emitter designed to control electron beam current profile in two dimensions
US8339024B2 (en) * 2009-07-20 2012-12-25 Hitachi Zosen Corporation Methods and apparatuses for reducing heat on an emitter exit window
US8847489B2 (en) * 2009-10-21 2014-09-30 Omega P-Inc. Low-voltage, multi-beam klystron
US9257253B1 (en) 2014-08-21 2016-02-09 Altair Technologies, Inc. Systems and methods utilizing a triode hollow cathode electron gun for linear particle accelerators
US10468222B2 (en) 2016-03-31 2019-11-05 General Electric Company Angled flat emitter for high power cathode with electrostatic emission control
EP3226277A1 (en) * 2016-03-31 2017-10-04 General Electric Company Angled flat emitter for high power cathode with electrostatic emission control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068287A (en) * 1933-10-14 1937-01-19 Gabor Denes Electric lamp
US2782334A (en) * 1952-03-10 1957-02-19 Raytheon Mfg Co Velocity modulated electron discharge devices
US2936394A (en) * 1955-07-18 1960-05-10 Hughes Aircraft Co Electron gun
US2977496A (en) * 1958-12-04 1961-03-28 Machlett Lab Inc Electrode structure for electron tubes
US3139552A (en) * 1960-03-07 1964-06-30 Hughes Aircraft Co Charged particle gun with nonspherical emissive surface
US3334257A (en) * 1966-01-04 1967-08-01 Howard D Doolittle Coaxial cathode-anode electron tube with channel-shaped control grids for the beaming structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113808896A (en) * 2021-09-16 2021-12-17 中国科学院高能物理研究所 Shadow mask assembly and electron gun

Also Published As

Publication number Publication date
DE1963389C3 (en) 1973-11-15
DE1963389A1 (en) 1971-02-04
DE1963389B2 (en) 1973-01-25
US3558967A (en) 1971-01-26
JPS5512698B1 (en) 1980-04-03

Similar Documents

Publication Publication Date Title
GB1286193A (en) Linear beam tube with plural cathode beamlets providing a convergent electron stream
ES438659A1 (en) Gridded X-ray tube gun
GB1420061A (en) Sputtering method and apparatus
GB982671A (en) Improvements in or relating to ion guns
GB1055729A (en) Cathode ray tubes
GB1234517A (en)
GB1421865A (en) Cathode ray tube including a non-rotationally symmetrical electron-optical element
GB1357469A (en) Electron-beam generators for transit-time electron discharge tubes
GB1264765A (en)
GB721571A (en) Cathode ray tube utilizing a plurality of electron beams
GB1217037A (en) Improvements in glow discharge cathodes
GB1516389A (en) Field emission gun
GB1216584A (en) Directly heated cathode
GB1013622A (en) Improvements in electron-beam tubes and electron guns for use therein
GB1500095A (en) Ion source using a hollow cathode discharge arrangement and a particle accelerator comprising such a source
GB1330448A (en) Television camera tube
JPS5784554A (en) Cathode-ray tube device
GB1507544A (en) Linear beam tubes
GB570672A (en) Improvements in or relating to cathode ray tubes
GB1414632A (en) Cathode ray kinexcope construction
GB1294425A (en) Storage tube apparatus
GB1228809A (en)
GB1400668A (en) Gridded electron gun apparatus employing a concave cathode emitter
GB1259966A (en) Method of assembling electron gun structures for cathode ray tubes
GB1160819A (en) Cathodes for Magnetrons

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PE20 Patent expired after termination of 20 years