GB1023655A - Electron multiplier - Google Patents
Electron multiplierInfo
- Publication number
- GB1023655A GB1023655A GB17010/63A GB1701063A GB1023655A GB 1023655 A GB1023655 A GB 1023655A GB 17010/63 A GB17010/63 A GB 17010/63A GB 1701063 A GB1701063 A GB 1701063A GB 1023655 A GB1023655 A GB 1023655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- resistive
- emissive
- photo
- electrode
- 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
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
Landscapes
- Measurement Of Radiation (AREA)
- Microwave Tubes (AREA)
Abstract
1,023,655. Electron multipliers. RADIO CORPORATION OF AMERICA. April 30, 1963 [May 24, 1962], No. 17010/63. Heading H1D. An electron multiplier has a tubular resistive secondary electron emissive coating 14 on the inner wall of the tubular envelope 12, and a central wire electrode 20 of radius in proportion of 1:800- 1000 to the radius of the tubular envelope. A potential gradient is established along the coating by the D.C. source 18 and a high positive voltage is applied to the electrode 20. The coating 14 is also photo-emissive so that the end 17 serves as a photo - cathode. Tensioning spring 22, or an enlarged end of the electrode 20, or a separate tubular electrode 24 forms the collector electrode of the tube. A light shield may be placed around the tube. The primary cathode, however, need not be a photo-cathode. In another embodiment a separate photo-emissive coating is provided at 17 to form the photo-cathode and the central electrode 20 is replaced by a quartz fibre with a resistive coating, e.g. of tin oxide, along which a potential gradient is also established. In a modification the resistive secondary electron emissive coating may be formed as a single or double helix. Conductive secondary electron emissive and possibly also photo-emissive elements may be deposited as a mosaic on the resistive material and, where resistive material is provided in the form of a helix, also on the envelope parts in between the turns of the helix. Alternatively, a resistive coating may be deposited over a resistive helix and a mosaic of conductive secondary electron emissive elements provided on the resistive coating. A resistive secondary emissive and photo-emissive coating may be formed by condensing a thin film of antimony, afterwards reacted with caesium, on a previously evaporated antimony coating. Conductive secondary emissive elements deposited as a mosaic on resistive material may consist of caesium-activated globules of oxidized silver, the resistive material consisting of a thin platinum film or alternatively, of caesiumactivated patches of antimony. A detailed account is given of the necessary equations for use in operating and designing the tube.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US197467A US3321660A (en) | 1962-05-24 | 1962-05-24 | Electron multiplier having resistive secondary emissive surface which is adapted to sustain a potential gradient, whereby successive multiplication is possible |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1023655A true GB1023655A (en) | 1966-03-23 |
Family
ID=22729532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17010/63A Expired GB1023655A (en) | 1962-05-24 | 1963-04-30 | Electron multiplier |
Country Status (5)
Country | Link |
---|---|
US (1) | US3321660A (en) |
BE (1) | BE632654A (en) |
FR (1) | FR1356812A (en) |
GB (1) | GB1023655A (en) |
NL (1) | NL293150A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3436590A (en) * | 1966-03-02 | 1969-04-01 | Itt | Electron multiplier |
US3506868A (en) * | 1967-05-22 | 1970-04-14 | Bendix Corp | Positive-type electron multiplier channels connected in series |
US3634713A (en) * | 1969-09-08 | 1972-01-11 | Bendix Corp | Electron multiplier having means for altering the equipotentials of the emissive surface to direct electrons towards the anode |
US3634690A (en) * | 1970-03-23 | 1972-01-11 | Itt | Tubular photocell with secondary emission from internal surface |
IL42668A (en) * | 1973-07-05 | 1976-02-29 | Seidman A | Channel electron multipliers |
US4604545A (en) * | 1980-07-28 | 1986-08-05 | Rca Corporation | Photomultiplier tube having a high resistance dynode support spacer anti-hysteresis pattern |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB468623A (en) * | 1935-11-08 | 1937-07-05 | John Edgar Keyston | Improvements in and relating to electron multipliers |
FR824385A (en) * | 1936-10-24 | 1938-02-07 | Materiel Telephonique | Electronic discharge devices using one or more electronically or photoelectrically controlled emissions |
US3233140A (en) * | 1961-07-25 | 1966-02-01 | Univ Illinois | Crossed-field dynamic electron multiplier |
-
0
- NL NL293150D patent/NL293150A/xx unknown
- BE BE632654D patent/BE632654A/xx unknown
-
1962
- 1962-05-24 US US197467A patent/US3321660A/en not_active Expired - Lifetime
-
1963
- 1963-04-30 GB GB17010/63A patent/GB1023655A/en not_active Expired
- 1963-05-17 FR FR935212A patent/FR1356812A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL293150A (en) | |
FR1356812A (en) | 1964-03-27 |
US3321660A (en) | 1967-05-23 |
BE632654A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1034118A (en) | Electron multiplier | |
GB1023655A (en) | Electron multiplier | |
GB499897A (en) | Improvements in auxiliary electrodes in electric discharge devices | |
GB1006756A (en) | Electron multiplier | |
GB745811A (en) | Improvements relating to electron multipliers | |
GB1194288A (en) | Improvements in or relating to Secondary Electron Multipliers. | |
GB402460A (en) | Improvements in or relating to cathode ray tubes | |
GB503211A (en) | Improvements in or relating to secondary electron multipliers | |
GB1502876A (en) | Cathode ray tube | |
GB979687A (en) | Electron multiplier | |
US2950408A (en) | Multi-gap collimation lens for use in direct-view storage tube | |
US3634690A (en) | Tubular photocell with secondary emission from internal surface | |
GB952148A (en) | Cathode ray tube screen intensifier | |
GB1494836A (en) | Electron discharge devices | |
GB1470575A (en) | Electron discharge devices | |
US3254252A (en) | Image device | |
GB1013019A (en) | Improvements in or relating to electron-optical image intensifiers | |
GB955831A (en) | Improvements in or relating to image converter tubes | |
GB975023A (en) | Cathode grid assembly for electron gun | |
GB1192329A (en) | Improvements in and relating to Image Intensifiers | |
GB1040334A (en) | Improvements in or relating to electrostatically focused electron discharge tubes | |
GB792507A (en) | Improvements in or relating to electron discharge devices | |
GB1137669A (en) | Arrangements for suppressing pincushion distortion and curvature of field in image formation by means of electrostatic electron lenses | |
GB1481944A (en) | Flat envelope type fluorescent character-indicating tube | |
GB829339A (en) | Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodes |