GB515525A - Improvements in or relating to electron multipliers - Google Patents
Improvements in or relating to electron multipliersInfo
- Publication number
- GB515525A GB515525A GB16243/38A GB1624338A GB515525A GB 515525 A GB515525 A GB 515525A GB 16243/38 A GB16243/38 A GB 16243/38A GB 1624338 A GB1624338 A GB 1624338A GB 515525 A GB515525 A GB 515525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heater
- cathode
- heating elements
- insulating
- coating
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 239000010445 mica Substances 0.000 abstract 2
- 229910052618 mica group Inorganic materials 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910000863 Ferronickel Inorganic materials 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052701 rubidium Inorganic materials 0.000 abstract 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 abstract 1
- 238000005488 sandblasting Methods 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
-
- 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
- H01J43/08—Cathode arrangements
Landscapes
- Electron Tubes For Measurement (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
515,525. Electron multipliers ; thermionic cathodes. STANDARD TELEPHONES & CABLES, Ltd. May 31, 1938, No. 16243. Convention date, June 23, 1937. [Class 39 (i)] In an electron multiplier used to amplify small currents the. thermionic cathode works at a temperature of between 100-150C. and the grid has a space charge control ; one arrangement uses perforated secondary emitting electrodes with intermediate focussing cylinders. The cathode comprises a hollow soldered box 1, Fig. 4, of silver, provided with the usual oxidized and caesiated surface, and internally heated by a wire, e.g. of ferro-nickel, wound on a mica former 4. Further mica insulating plates 6 are provided on each side of the heater. Alternatively, the heating elements may be graphite rods. The emissive layer may be mounted on an insulating coating on a nickel layer which acts as a resistance heater, or may be on moulded insulating plates 8, 8<1>, Fig. 8, mounted back to back with the heating elements 5 between them. A solid insulating coated cathode may be cylindrical in form with an axial heater. Gold or other similar metals may be used and the coating may be rubidium or sodium ; the metal surface may be roughened by sand-blasting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR833591T | 1937-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB515525A true GB515525A (en) | 1939-12-07 |
Family
ID=9296661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16243/38A Expired GB515525A (en) | 1937-06-23 | 1938-05-31 | Improvements in or relating to electron multipliers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2226696A (en) |
| FR (1) | FR833591A (en) |
| GB (1) | GB515525A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3125701A (en) * | 1964-03-17 | Thermionic emitter for high frequency tube apparatus | ||
| DE893515C (en) * | 1938-12-17 | 1953-10-15 | Lorenz C Ag | Arrangement for reducing the noise level in amplifier tubes |
| BE475720A (en) * | 1946-08-30 |
-
1937
- 1937-06-23 FR FR833591D patent/FR833591A/en not_active Expired
-
1938
- 1938-05-31 GB GB16243/38A patent/GB515525A/en not_active Expired
- 1938-06-22 US US215168A patent/US2226696A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR833591A (en) | 1938-10-25 |
| US2226696A (en) | 1940-12-31 |
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