GB594338A - Photo-electric electron multiplier - Google Patents
Photo-electric electron multiplierInfo
- Publication number
- GB594338A GB594338A GB13019/41A GB1301941A GB594338A GB 594338 A GB594338 A GB 594338A GB 13019/41 A GB13019/41 A GB 13019/41A GB 1301941 A GB1301941 A GB 1301941A GB 594338 A GB594338 A GB 594338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caesium
- electrodes
- cathode
- alloy
- 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
- 229910052792 caesium Inorganic materials 0.000 abstract 5
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 5
- 239000000956 alloy Substances 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 238000005275 alloying Methods 0.000 abstract 1
- DLISVFCFLGSHAB-UHFFFAOYSA-N antimony arsenic Chemical compound [As].[Sb] DLISVFCFLGSHAB-UHFFFAOYSA-N 0.000 abstract 1
- 239000010953 base metal Substances 0.000 abstract 1
- 229910052797 bismuth Inorganic materials 0.000 abstract 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission 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
- H01J1/34—Photo-emissive cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/34—Photoemissive electrodes
- H01J2201/342—Cathodes
- H01J2201/3421—Composition of the emitting surface
- H01J2201/3426—Alkaline metal compounds, e.g. Na-K-Sb
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
594,338. Electron multipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 8, 1941, No. 13019. Convention date, Oct. 8, 1940. [Class 39 (i)] In an electron-multiplier with the primary photo cathode 2 and the secondary emitting electrodes 3, 5, 6, 7 both formed by alloying caesium on a film of metal such as antimony arsenic or bismuth, the film on the cathode is thinner than those on the electrodes 3, 5, 6, 7 so that the proportion of caesium in the alloy is higher. The proportion of caesium in the alloy in the cathode is between 1¢ to 3 times that in the alloy of the secondary electrodes. A wide mesh grid 4 directs the electrons from the cathode to the electrode 3 ; the grid anode 8 is surrounded by a shield 9. The metal films are supported on a nickel or other base metal. The metal films are formed on the bases in separate chambers and then the bases are mounted by mica spacers in the envelope 1 which is evacuated and baked at 150 C. ; caesium is vaporized from a tab within the envelope while the electrodes are maintained at a temperature between room and 200 C. The caesium may be vaporized first on to the envelope walls and from thence to the electrodes. A further baking at between 150 to 170 C. is then made.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US360255A US2401734A (en) | 1940-10-08 | 1940-10-08 | Photoelectric electron multiplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594338A true GB594338A (en) | 1947-11-10 |
Family
ID=23417229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13019/41A Expired GB594338A (en) | 1940-10-08 | 1941-10-08 | Photo-electric electron multiplier |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2401734A (en) |
| GB (1) | GB594338A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2702865A (en) * | 1949-04-02 | 1955-02-22 | Texas Co | Electron multiplier |
| NL169983B (en) * | 1951-06-01 | Univ Kansas State | PROCESS FOR DISINFECTING WATER CONTAINING LIVE BACTERIA CELLS USING HIGHLY BASIC ANION EXCHANGE RESINS IN POLYHALOGENIDE FORM. | |
| US2746831A (en) * | 1952-08-27 | 1956-05-22 | Ibm | Method for cleaning electrodes |
| US2877078A (en) * | 1954-04-13 | 1959-03-10 | Du Mont Allen B Lab Inc | Method of treating phototubes |
| US2933362A (en) * | 1954-10-06 | 1960-04-19 | Sylvania Electric Prod | Mercury lamp voltage control |
| US2881042A (en) * | 1955-02-18 | 1959-04-07 | Rca Corp | Composite photoconductive layer |
| US2875361A (en) * | 1955-05-31 | 1959-02-24 | Rca Corp | Auxiliary heaters to aid in activation of cathode ray type guns |
| US2952499A (en) * | 1957-11-18 | 1960-09-13 | Philco Corp | Processing system |
| CA1011192A (en) * | 1972-12-11 | 1977-05-31 | Rca Corporation | Method of making a multialkali electron-emissive layer |
| US3858955A (en) * | 1973-01-15 | 1975-01-07 | Rca Corp | Method of making a iii-v compound electron-emissive cathode |
| US3873867A (en) * | 1974-01-25 | 1975-03-25 | Rca Corp | Support and focus structure for photomultiplier |
-
1940
- 1940-10-08 US US360255A patent/US2401734A/en not_active Expired - Lifetime
-
1941
- 1941-10-08 GB GB13019/41A patent/GB594338A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2401734A (en) | 1946-06-11 |
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