GB794333A - Velocity modulated electron tubes - Google Patents

Velocity modulated electron tubes

Info

Publication number
GB794333A
GB794333A GB23085/54A GB2308554A GB794333A GB 794333 A GB794333 A GB 794333A GB 23085/54 A GB23085/54 A GB 23085/54A GB 2308554 A GB2308554 A GB 2308554A GB 794333 A GB794333 A GB 794333A
Authority
GB
United Kingdom
Prior art keywords
cathode
anode
electrode
bore
electron tubes
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
GB23085/54A
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
Eitel Mccullough 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 Eitel Mccullough Inc filed Critical Eitel Mccullough Inc
Publication of GB794333A publication Critical patent/GB794333A/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
    • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Treatment Of Sludge (AREA)

Abstract

794,333. Velocity-modulated tubes. EITELMcCULLOUGH, Inc. Aug. 9, 1954 [Oct. 5, 1953], No. 23085/54. Class 39(1). The beam-forming structure comprises a concave cathode 2, a focussing electrode 8 adjacent the cathode, a first anode 7 having a bore of sufficient length to shield the cathode and focussing electrode completely from the remainder of the system and a second anode 11, both anodes being annular members capable of passing the beam without obstruction. By applying a high voltage V A to electrode 7 and a lower voltage V B to electrode 11 it is stated that an increased perveance is obtained. The bore in anode 7 is of length greater than its width but less than the distance from the cathode and has a widened portion adjacent the cathode. Ceramic cylinders 9, 12 sealed to the electrodes complete the envelope and the beam passes on to the high-frequency section 17. The anode 7 may be used for modulation of the beam. A further advantage of the arrangement is to reduce positive-ion bombardment of the cathode. Specification 794,334 is referred to.
GB23085/54A 1953-10-05 1954-08-09 Velocity modulated electron tubes Expired GB794333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US384097A US2842703A (en) 1953-10-05 1953-10-05 Electron gun for beam-type tubes

Publications (1)

Publication Number Publication Date
GB794333A true GB794333A (en) 1958-04-30

Family

ID=23516024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23085/54A Expired GB794333A (en) 1953-10-05 1954-08-09 Velocity modulated electron tubes

Country Status (4)

Country Link
US (1) US2842703A (en)
CH (1) CH331028A (en)
FR (1) FR1119900A (en)
GB (1) GB794333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1295099B (en) * 1960-03-10 1969-05-14 Siemens Ag Electron beam generation system for transit time tubes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE572338A (en) * 1957-12-03
US3007077A (en) * 1958-03-25 1961-10-31 Roger White Electron Devices I Electronic phase shifter for vhf-uhf frequencies
JP2765533B2 (en) * 1995-10-31 1998-06-18 日本電気株式会社 Straight beam microwave tube
JP3011127B2 (en) * 1997-03-27 2000-02-21 日本電気株式会社 Cold cathode electron gun and microwave tube for microwave tube
DE102013223517A1 (en) 2013-11-19 2015-06-03 Siemens Aktiengesellschaft Electron gun and radiation generator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484643A (en) * 1945-03-06 1949-10-11 Bell Telephone Labor Inc High-frequency electronic device
BE469122A (en) * 1946-01-11 Western Electric Co
BE481089A (en) * 1946-05-04
US2517726A (en) * 1946-07-17 1950-08-08 Philco Corp Ultra high frequency electron tube
US2632130A (en) * 1947-11-28 1953-03-17 Joseph F Hull High current density beam tube
US2581243A (en) * 1949-05-28 1952-01-01 Rca Corp Cathode of electron beam devices
US2800606A (en) * 1951-10-26 1957-07-23 Univ Leland Stanford Junior Space charge wave amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1295099B (en) * 1960-03-10 1969-05-14 Siemens Ag Electron beam generation system for transit time tubes

Also Published As

Publication number Publication date
CH331028A (en) 1958-06-30
US2842703A (en) 1958-07-08
FR1119900A (en) 1956-06-26

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