IL43515A - Gridded electron tube having improved control grid coolin - Google Patents
Gridded electron tube having improved control grid coolinInfo
- Publication number
- IL43515A IL43515A IL43515A IL4351573A IL43515A IL 43515 A IL43515 A IL 43515A IL 43515 A IL43515 A IL 43515A IL 4351573 A IL4351573 A IL 4351573A IL 43515 A IL43515 A IL 43515A
- Authority
- IL
- Israel
- Prior art keywords
- annular
- insulator
- cathode emitter
- beryllia
- insulator body
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/06—Electron or ion guns
- H01J23/065—Electron or ion guns producing a solid cylindrical beam
Landscapes
- Electron Sources, Ion Sources (AREA)
- Microwave Tubes (AREA)
Claims (8)
1. In an electron tube: thermionic cathode emitter means having a concave cathode emitting surface for supplying copious thermionic electron emission; centrally apertured anode means axially spaced from said cathode emitter means and disposed facing said cathode emitter surface for forming and projecting a beam of electrons over a beam path to a beam collector structure ; focus electrode means disposed surrounding said beam path intermediate said cathode emitter and said anode for focusing said beam through said central aperture in said anode means; control grid means disposed across said beam path between said focus electrode and said cathode emitter for controlling the beam current; evacuable envelope means for enclosing said beam path, said thermionic cathode emitter means, and said focus electrode means, said envelope means including a thermally conductive metallic body portion enclosing the beam path between said anode means and said beam collector, and means for cooling said body portion of said envelope; high voltage insulator means forming a portion of said evacuable envelope means and disposed between said cathode emitter means and said anode means for holding off the beam potential to be applied between said, cathode emitter means and said anode means in use, said insulator means comprising an annular insulator body of beryllia ceramic, said cathode emitter means being mounted substantiall within the central bore in said annular insulator body in thermally insulativc clatiofr relative to the wall of said bore, said control grid means and said focus electrode means being mounted at the peripheries to said annular beryllia insulator body; and mounting means for mounting said annular beryllia insulator body to said body portion of said evacuable envelope in heat exchanging relation with said body, whereby said control grid is cooled by thermal conduction through said beryllia insulator body to said cooled body portion of the tube.
2. The apparatus of claim 1· wherein said annular insulator body includes an annularly corrugated surface facing said anode means to define first and second annular lands separated by a first annular groove, and said control grid means and said focus electrode means being mounted to said first and second lands, respectively.
3. -. The apparatus of claim 2 wherein said annular beryllia insulator body includes a second annular groove said surface facing said anode to define a third annular land, and wherein said mounting means for mounting said beryllia insulator to said cooled body portion of said evacuable envelope is bonded to said third annular land. 4
4. The apparatus of claim 1 wherein said mounting means includes a thin yieldable metallic tubular portion bonded via a gas tight seal at one end to said insulator body.
5. The apparatus of claim 2 wherein the top portions of said first and second lands of said insulator body lie in substantially the same plane which is normal to the longitudinal axis of the beam path.
6. The apparatus of claim 3 wherein the top portions of said first, second and third lands of said insulator body lie substantially in the same plane which is normal to the longitudinal axis of the beam path.
7. The apparatus of claim 1 wherein said control grid means includes a concave grid portion extending across said beam path and an annular radially directed lip portion, said lip portion being bonded to said insulator body in heat exchanging relation therewith for conduction cooling of said grid through said beryllia ceramic body.
8. The apparatus of claim 1 including heat shield means interposed between said cathode emitter means and the wall of said bore in said insulator body for thermally insulating said cathode emitter from said beryllia insulator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00304703A US3809939A (en) | 1972-11-08 | 1972-11-08 | Gridded electron tube employing cooled ceramic insulator for mounting control grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL43515A0 IL43515A0 (en) | 1974-01-14 |
| IL43515A true IL43515A (en) | 1976-02-29 |
Family
ID=23177626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL43515A IL43515A (en) | 1972-11-08 | 1973-10-29 | Gridded electron tube having improved control grid coolin |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3809939A (en) |
| IL (1) | IL43515A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340837A (en) * | 1980-01-10 | 1982-07-20 | The United States Of America As Represented By The Secretary Of The Air Force | Low volume, lightweight, high voltage electron gun |
| DE3715924A1 (en) * | 1987-05-13 | 1988-12-01 | Gte Licht Gmbh | PHOTOCELL, ESPECIALLY FOR DETECTING UV RADIATION |
| DE3930399A1 (en) * | 1989-09-12 | 1991-03-14 | Ptr Praezisionstech Gmbh | ELECTRIC BEAM GENERATOR, ESPECIALLY FOR AN ELECTRON BEAM CANNON |
| US5990622A (en) * | 1998-02-02 | 1999-11-23 | Litton Systems, Inc. | Grid support structure for an electron beam device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6606842A (en) * | 1965-05-25 | 1966-11-28 | ||
| US3666980A (en) * | 1970-10-20 | 1972-05-30 | Varian Associates | Depressable beam collector structure for electron tubes |
| US3706002A (en) * | 1970-11-16 | 1972-12-12 | Varian Associates | Electron gun |
-
1972
- 1972-11-08 US US00304703A patent/US3809939A/en not_active Expired - Lifetime
-
1973
- 1973-10-29 IL IL43515A patent/IL43515A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3809939A (en) | 1974-05-07 |
| IL43515A0 (en) | 1974-01-14 |
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