FR2225840A1 - Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer - Google Patents

Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer

Info

Publication number
FR2225840A1
FR2225840A1 FR7313666A FR7313666A FR2225840A1 FR 2225840 A1 FR2225840 A1 FR 2225840A1 FR 7313666 A FR7313666 A FR 7313666A FR 7313666 A FR7313666 A FR 7313666A FR 2225840 A1 FR2225840 A1 FR 2225840A1
Authority
FR
France
Prior art keywords
holes
layer
absorption layer
long life
positive ion
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.)
Granted
Application number
FR7313666A
Other languages
French (fr)
Other versions
FR2225840B3 (en
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to FR7313666A priority Critical patent/FR2225840A1/en
Publication of FR2225840A1 publication Critical patent/FR2225840A1/en
Application granted granted Critical
Publication of FR2225840B3 publication Critical patent/FR2225840B3/fr
Granted 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
    • H01J43/24—Dynodes having potential gradient along their surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/506—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

The TV camera tube life is extended if the positive ions are captured and absorbed by a layer on its screen. This reduces the poisoning of the photo-cathode (15). A conductive layer is deposited on one face of the disc. A titanium layer (21) is deposited on top and the holes of all layers are in line. The photo-cathode is so positioned that it emits primary electrons to the second layer, which is kept at a positive potential compared with the photo-cathode. The electrons of the first layer are captured by a device distant from it. The positive ions, freed from the latter, have a definite trajectory and bombard the surface without hindrance.
FR7313666A 1973-04-16 1973-04-16 Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer Granted FR2225840A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7313666A FR2225840A1 (en) 1973-04-16 1973-04-16 Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7313666A FR2225840A1 (en) 1973-04-16 1973-04-16 Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer

Publications (2)

Publication Number Publication Date
FR2225840A1 true FR2225840A1 (en) 1974-11-08
FR2225840B3 FR2225840B3 (en) 1976-04-02

Family

ID=9118003

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7313666A Granted FR2225840A1 (en) 1973-04-16 1973-04-16 Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer

Country Status (1)

Country Link
FR (1) FR2225840A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112782547A (en) * 2020-12-11 2021-05-11 兰州空间技术物理研究所 Method for predicting service life of electron multiplier of cesium atomic clock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112782547A (en) * 2020-12-11 2021-05-11 兰州空间技术物理研究所 Method for predicting service life of electron multiplier of cesium atomic clock

Also Published As

Publication number Publication date
FR2225840B3 (en) 1976-04-02

Similar Documents

Publication Publication Date Title
GB1142262A (en) Improvements in or relating to cathode ray tubes
US2513743A (en) Electron storage device with grid control action
JPS53121454A (en) Electron source of thin film electric field emission type and its manufacture
US2881340A (en) Photoconductive television pickup tube
US2744837A (en) Photo-conductive targets for cathode ray devices
GB507448A (en) Improvements in or relating to electron multipliers
FR2225840A1 (en) Long life electron multiplier - has dielectric disc with holes for electron emission and positive ion absorption layer
US2960416A (en) Method of manufacturing screens for electron-discharge devices
ES467463A1 (en) Image intensifier tube with photocathode protective circuit
US2434931A (en) Method and apparatus for ionic discharge coating
US3011919A (en) Method of forming a multi-layer pick-up screen
GB1526743A (en) Television camera tube
GB695115A (en) Improvements in or relating to television transmitting tubes
US3535574A (en) Image pick-up tube with a photosensitive transmission secondary electron multiplication layer
US2198327A (en) Mosaic electrode structure
GB896544A (en) Improvements in or relating to signal storage tubes
US2637002A (en) Television pickup tube
GB1043430A (en) Radiation sensitive device
US3509414A (en) Storage tube with electron bombardment induced conductivity target
US2871368A (en) Image multiplier
US2899576A (en) Electron discharge i
GB1131622A (en) Storage tube screens
GB1240266A (en) Improvements relating to electron discharge devices
GB1002963A (en) Electron multiplier
GB709945A (en) Improvements relating to mosaic target electrodes as are utilised in television pick-up tubes