GB517806A - Electron multiplier device - Google Patents
Electron multiplier deviceInfo
- Publication number
- GB517806A GB517806A GB24687/39A GB2468739A GB517806A GB 517806 A GB517806 A GB 517806A GB 24687/39 A GB24687/39 A GB 24687/39A GB 2468739 A GB2468739 A GB 2468739A GB 517806 A GB517806 A GB 517806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copper
- cathode
- diminish
- feb
- envelope
- 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
Landscapes
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
517,806. Electron multipliers. RADIOAKT.- GES. D. S. LOEWE. Feb. 14, 1938, No. 246S7/39. Convention date, Feb. 16, 1937. Divided out of 512,711. [Class 39 (i)] A photo-electric cathode of an electronmultiplier is cooled to below room temperature to diminish " shot effect." For that purpose the cathode 1, which is preferably concave, is formed as the under surface of a Dewar flask 11, which can be filled with liquid air, the vacuum jacket of the flaskbeing formed by part of the multiplier envelope. The outside of the vessel 11 is coated with material inactive photo-electrically, such as copper, and the envelope may have a lining 10c of silver or copper ; these coatings are kept at cathode potential or somewhat higher. The first of the concentrating electrodes 3 is attached to the flask 11 by thick copper supports 12 so as to be cooled, and may be blackened externally to cool the first multiplying electrode 2 by radiation. The space between the electrodes 1 and 2 is screened from the wall of the tube by a conducting net 8, and an annular screen Sa may be arranged at the end of a coating 8b which is furnished with a rounded edge 9 to diminish discharge.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE512711X | 1937-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB517806A true GB517806A (en) | 1940-02-08 |
Family
ID=6548209
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4541/38A Expired GB512711A (en) | 1937-02-16 | 1938-02-14 | Electron multiplier |
| GB24687/39A Expired GB517806A (en) | 1937-02-16 | 1938-02-14 | Electron multiplier device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4541/38A Expired GB512711A (en) | 1937-02-16 | 1938-02-14 | Electron multiplier |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2227030A (en) |
| BE (1) | BE426405A (en) |
| FR (1) | FR833741A (en) |
| GB (2) | GB512711A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3333133A (en) * | 1948-04-15 | 1967-07-25 | George A Morton | Pick up tube with infra-red sensitive thermionic cathode with cooling means spaced from the thermionic cathode |
| US2702865A (en) * | 1949-04-02 | 1955-02-22 | Texas Co | Electron multiplier |
| US2727119A (en) * | 1954-11-02 | 1955-12-13 | Electronics Corp America | Radiation-sensitive device |
| US2920205A (en) * | 1957-10-02 | 1960-01-05 | Wolfgang J Choyke | Radiant energy detector |
-
0
- BE BE426405D patent/BE426405A/xx unknown
-
1938
- 1938-02-05 US US188951A patent/US2227030A/en not_active Expired - Lifetime
- 1938-02-14 FR FR833741D patent/FR833741A/en not_active Expired
- 1938-02-14 GB GB4541/38A patent/GB512711A/en not_active Expired
- 1938-02-14 GB GB24687/39A patent/GB517806A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2227030A (en) | 1940-12-31 |
| FR833741A (en) | 1938-10-28 |
| BE426405A (en) | |
| GB512711A (en) | 1939-09-25 |
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