GB472717A - Improvements in or relating to secondary emission electron multipliers - Google Patents
Improvements in or relating to secondary emission electron multipliersInfo
- Publication number
- GB472717A GB472717A GB2157536A GB2157536A GB472717A GB 472717 A GB472717 A GB 472717A GB 2157536 A GB2157536 A GB 2157536A GB 2157536 A GB2157536 A GB 2157536A GB 472717 A GB472717 A GB 472717A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- grid
- cathodes
- potential
- modulating
- 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
- H01J43/30—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
472,717. Electron multipliers. GENERAL ELECTRIC CO., Ltd., and FRY, D. W. Aug. 5, 1936, No. 21575. [Classes 39 (i) and 40 (v)] A multiplier comprises a plurality of grids, each lying in the path of the electron stream from one cathode to the next and all connected to the same alternating modulating voltage which carries each of them through the same cycle of potential about its mean potential. Preferably, one such grid is associated with the cathode in every stage ; the cumulative effect of each grid on its saturated electron stream results in a large total effect. In the form shown, each cathode 1 has above it an accelerating electrode 4 connected to the next cathode, which, in association with a magnetic field, guides the electrons between the cathodes. A grid 6 is placed before each cathode and biassed slightly negatively by connection to a point on the potential divider 3 through a leak resistance 7. A modulating source 8 is connected to each grid through a capacity 9. The first cathode is photo-electric. In another form, the electrons pass in a zigzag fashion between the cathodes, on which they are focused electrostatically by cvlindrical extensions of the cathodes. A modulating grid is placed in each of the gaps left between the extensions. Additional magnetic focusing may be employed. The Provisional Specification describes an arrangement in which a bias resistance is connected in each cathode lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2157536A GB472717A (en) | 1936-08-05 | 1936-08-05 | Improvements in or relating to secondary emission electron multipliers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2157536A GB472717A (en) | 1936-08-05 | 1936-08-05 | Improvements in or relating to secondary emission electron multipliers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB472717A true GB472717A (en) | 1937-09-29 |
Family
ID=10165225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2157536A Expired GB472717A (en) | 1936-08-05 | 1936-08-05 | Improvements in or relating to secondary emission electron multipliers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB472717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2662177A (en) * | 1947-04-21 | 1953-12-08 | Hartford Nat Bank & Trust Co | Switching system using secondary emission type beam tubes |
-
1936
- 1936-08-05 GB GB2157536A patent/GB472717A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2662177A (en) * | 1947-04-21 | 1953-12-08 | Hartford Nat Bank & Trust Co | Switching system using secondary emission type beam tubes |
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