GB1002963A - Electron multiplier - Google Patents
Electron multiplierInfo
- Publication number
- GB1002963A GB1002963A GB9819/63A GB981963A GB1002963A GB 1002963 A GB1002963 A GB 1002963A GB 9819/63 A GB9819/63 A GB 9819/63A GB 981963 A GB981963 A GB 981963A GB 1002963 A GB1002963 A GB 1002963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- magnesium
- dynode
- chromium
- evaporated
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 3
- 229910052804 chromium Inorganic materials 0.000 abstract 3
- 239000011651 chromium Substances 0.000 abstract 3
- 229910052749 magnesium Inorganic materials 0.000 abstract 3
- 239000011777 magnesium Substances 0.000 abstract 3
- 230000008020 evaporation Effects 0.000 abstract 2
- 238000001704 evaporation Methods 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910001120 nichrome Inorganic materials 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements
-
- 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
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
1,002,963. Electron multipliers. RADIO CORPORATION OF AMERICA. March 12, 1963 [March 30, 1962], No. 9819/63. Heading H1D. An electron multiplier includes a dynode having a surface exposed to electrons comprising a layer 32 of magnesium oxide, 25 to 250 Angstroms thick. The layer 32 is evaporated as magnesium metal on to a layer 28 of chromium, nickel or gold, 100 to 200 Angstroms thick which is itself evaporated on to a base 30 of chromium, silver, " Nichrome " (Registered Trade Mark) or nickel. Alternatively, the magnesium may be evaporated on to a solid base of chromium, but the additional layer 28 is preferred to provide a clean surface for the magnesium, the evaporation of which follows that for the layer 28 without breaking the vacuum. A method for controlling the layer thickness, depending on the reduction in light transmission through an auxiliary glass substrate, is described. The layer 28 may be applied in two evaporations with the dynode rotated 180 degrees between them. The magnesium is oxidized and possibly then fired at 725 C. in a hydrogen atmosphere to remove impurities. The dynode is the first one of a series mounted in an image-orthicon pick-up tube of standard construction (Fig. 1, not shown). It is mounted immediately in front of the electron gun and has a hole 17, 2 to 4 mils. diameter .to pass these electrons; the surface receives those reflected from the target. Operating voltages are given and the relationship between the voltage on the dynode and the optimum layer thickness is discussed. Specifications 673,224 and 771,504 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US183802A US3308324A (en) | 1962-03-30 | 1962-03-30 | Electron multiplier and method of manufacturing dynodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1002963A true GB1002963A (en) | 1965-09-02 |
Family
ID=22674345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9819/63A Expired GB1002963A (en) | 1962-03-30 | 1963-03-12 | Electron multiplier |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3308324A (en) |
| JP (1) | JPS4838964B1 (en) |
| BE (1) | BE630375A (en) |
| DE (1) | DE1293196B (en) |
| GB (1) | GB1002963A (en) |
| NL (1) | NL290906A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1570873A (en) * | 1967-07-14 | 1969-06-13 | ||
| US3673457A (en) * | 1969-11-25 | 1972-06-27 | Corning Glass Works | High gain storage target |
| JPS5241093B2 (en) * | 1973-05-16 | 1977-10-17 | ||
| US3993926A (en) * | 1974-10-07 | 1976-11-23 | Goodyear Aerospace Corporation | Storage tube moving target detector |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB670561A (en) * | 1945-11-07 | 1952-04-23 | Emi Ltd | Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein |
| US2747133A (en) * | 1950-07-05 | 1956-05-22 | Rca Corp | Television pickup tube |
| GB741649A (en) * | 1951-09-06 | 1955-12-07 | Pye Ltd | Improvements in or relating to television transmitting apparatus |
| US2898499A (en) * | 1956-05-23 | 1959-08-04 | Westinghouse Electric Corp | Transmission secondary emission dynode structure |
| CA617300A (en) * | 1956-12-26 | 1961-03-28 | Wargo Peter | Long-life rugged storage structure for electronic tubes |
| US2942132A (en) * | 1957-10-02 | 1960-06-21 | Rca Corp | Electron multiplier |
| NL277821A (en) * | 1961-04-28 | |||
| US3236686A (en) * | 1962-01-02 | 1966-02-22 | Gen Electric | Storage electrode |
-
0
- BE BE630375D patent/BE630375A/xx unknown
- NL NL290906D patent/NL290906A/xx unknown
-
1962
- 1962-03-30 US US183802A patent/US3308324A/en not_active Expired - Lifetime
-
1963
- 1963-03-12 GB GB9819/63A patent/GB1002963A/en not_active Expired
- 1963-03-14 DE DER34685A patent/DE1293196B/en not_active Withdrawn
- 1963-03-30 JP JP38016648A patent/JPS4838964B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1293196B (en) | 1969-04-24 |
| BE630375A (en) | |
| JPS4838964B1 (en) | 1973-11-21 |
| NL290906A (en) | |
| US3308324A (en) | 1967-03-07 |
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