GB586000A - Improvements in or relating to secondary electron emitting electrodes, and to electron discharge devices embodying such electrodes - Google Patents
Improvements in or relating to secondary electron emitting electrodes, and to electron discharge devices embodying such electrodesInfo
- Publication number
- GB586000A GB586000A GB1588/44A GB158844A GB586000A GB 586000 A GB586000 A GB 586000A GB 1588/44 A GB1588/44 A GB 1588/44A GB 158844 A GB158844 A GB 158844A GB 586000 A GB586000 A GB 586000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- electrodes
- electron
- relating
- jan
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 230000003213 activating effect Effects 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 229910052792 caesium Inorganic materials 0.000 abstract 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 1
- 239000010406 cathode material Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000011651 chromium Substances 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 239000003086 colorant Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 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
Classifications
-
- 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
- H01J1/32—Secondary-electron-emitting electrodes
Landscapes
- Solid Thermionic Cathode (AREA)
- Discharge Lamp (AREA)
Abstract
586,000. Cathode materials; electron multipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 27, 1944, No. 1588. Convention date, Jan. 27, 1943. [Class 39 (i)] A secondary-electron emitting material comprises a layer of chromic oxide covered with a suitable activating material such as caesium or rubidium. The layer may be thick enough to show the typical green colour or, preferably, is made so thin (10-<4>-10-<3> cms.) that interference colours appear. It is prepared by heating degassed pure chromium, plated on iron, or an alloy with iron, nickel or cobalt, in oxygen to produce the thin layer, or in moist hydrogen to produce the thick layer. Subsequently, the activating metal is vaporized on to the layer, baked at 250 C., heated in oxygen and again baked. The emission is stable up to 500 or 600 C., and makes the material suitable for use in a beam mixer tube having two secondary emitting electrodes 16, 18 and collector 17.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US473663A US2390701A (en) | 1943-01-27 | 1943-01-27 | Secondary electron emitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB586000A true GB586000A (en) | 1947-03-04 |
Family
ID=23880491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1588/44A Expired GB586000A (en) | 1943-01-27 | 1944-01-27 | Improvements in or relating to secondary electron emitting electrodes, and to electron discharge devices embodying such electrodes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2390701A (en) |
| GB (1) | GB586000A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2567406A (en) * | 1944-03-23 | 1951-09-11 | Bell Telephone Labor Inc | Electric discharge device for highfrequency oscillations |
| NL72121C (en) * | 1945-10-24 | |||
| GB683061A (en) * | 1948-01-24 | 1952-11-19 | Emi Ltd | Improvements relating to thermionic valves utilising secondary electron emission amplification |
| US2540635A (en) * | 1948-05-27 | 1951-02-06 | Rca Corp | Cesiated monoscope |
| US2698397A (en) * | 1948-07-01 | 1954-12-28 | Sylvania Electric Prod | Electron discharge device |
| US2559524A (en) * | 1948-10-20 | 1951-07-03 | Rca Corp | Electron discharge device of the beam deflection type |
| US2620287A (en) * | 1949-07-01 | 1952-12-02 | Bramley Jenny | Secondary-electron-emitting surface |
| US3351486A (en) * | 1966-11-23 | 1967-11-07 | Sylvania Electric Prod | Cathodes |
| US4099079A (en) * | 1975-10-30 | 1978-07-04 | U.S. Philips Corporation | Secondary-emissive layers |
| US4347458A (en) * | 1980-03-26 | 1982-08-31 | Rca Corporation | Photomultiplier tube having a gain modifying Nichrome dynode |
-
1943
- 1943-01-27 US US473663A patent/US2390701A/en not_active Expired - Lifetime
-
1944
- 1944-01-27 GB GB1588/44A patent/GB586000A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2390701A (en) | 1945-12-11 |
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