GB470102A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB470102A
GB470102A GB393036A GB393036A GB470102A GB 470102 A GB470102 A GB 470102A GB 393036 A GB393036 A GB 393036A GB 393036 A GB393036 A GB 393036A GB 470102 A GB470102 A GB 470102A
Authority
GB
United Kingdom
Prior art keywords
grids
electron
electrodes
cathode
multiplying
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
GB393036A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB393036A priority Critical patent/GB470102A/en
Priority to DEM137115D priority patent/DE763043C/en
Publication of GB470102A publication Critical patent/GB470102A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/06—Electrode arrangements
    • H01J43/18—Electrode arrangements using essentially more than one dynode
    • H01J43/22—Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind

Landscapes

  • X-Ray Techniques (AREA)
  • Electron Tubes For Measurement (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

470,102. Electron multipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and MYERS, L. M. Feb. 8, 1936, No. 3930. [Class 39 (i)] Electron multipliers comprise several closemesh grids of low work-function interposed in an evacuated envelope between a source of primary electrons and a single output electrode, successive stages of electron multiplication occurring at the grids and the whole, final electron stream being intercepted by the output electrode. The electron emission from a thermionic cathode C is controlled by an openmesh grid CG and is multiplied at successive grids MG<1> .. MG' of fine mesh of the order of 200 or more to the inch before reaching the anode A. The multiplying grids are of silver or silver-plated copper oxidized and treated with vapour of alkaline metal such as caesium, rubidium, sodium or potassium, and the other electrodes are of nickel. The electrodes may be cylindrical as shown, or parallel planes, and are supplied from a potentiometer P. Suppressor grids may be arranged in front of the multiplying grids to direct the secondary emission and to reduce back-coupling. In a modification, the cathode is a photoelectric plate transverse to the axis of the cylindrical electrodes. The grid CG may then be omitted or may receive a carrier wave to be modulated according to light variations at the cathode. Specification 454,133 is referred to.
GB393036A 1936-02-08 1936-02-08 Improvements in or relating to electron discharge devices Expired GB470102A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB393036A GB470102A (en) 1936-02-08 1936-02-08 Improvements in or relating to electron discharge devices
DEM137115D DE763043C (en) 1936-02-08 1937-02-09 Secondary electron multiplier with impact electrodes arranged coaxially to the primary electron source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB393036A GB470102A (en) 1936-02-08 1936-02-08 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB470102A true GB470102A (en) 1937-08-09

Family

ID=9767567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB393036A Expired GB470102A (en) 1936-02-08 1936-02-08 Improvements in or relating to electron discharge devices

Country Status (2)

Country Link
DE (1) DE763043C (en)
GB (1) GB470102A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745730C (en) * 1938-03-04 1944-05-22 Fernseh Gmbh Series multiplier for high output currents
DE757225C (en) * 1938-08-30 1952-11-17 Lorenz C Ag Secondary electron multiplier with several impact electrodes arranged one behind the other and concentric to the primary electron source designed as a glow cathode

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR552185A (en) * 1923-04-25
US1903569A (en) * 1926-09-15 1933-04-11 Kenneth W Jarvis Electron tube
US1738397A (en) * 1926-10-15 1929-12-03 Drahtlose Telegraphie Gmbh Modulating carrier wave by photo-electric currents
CH158401A (en) * 1930-09-25 1932-11-15 Rca Corp Method and device for receiving telegraphically transmitted images by means of a cathode ray tube.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745730C (en) * 1938-03-04 1944-05-22 Fernseh Gmbh Series multiplier for high output currents
DE757225C (en) * 1938-08-30 1952-11-17 Lorenz C Ag Secondary electron multiplier with several impact electrodes arranged one behind the other and concentric to the primary electron source designed as a glow cathode

Also Published As

Publication number Publication date
DE763043C (en) 1953-05-11

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