US3876901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave beam tube having an improved fluid cooled main body
Assignee: Varian Medical Systems Inc
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Filing: 1973-12-03
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Granted: 1975-04-08
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Expires: 1993-12-03
Abstract
Abstract The relatively soft metal main body portion of an X band linear beam tube, such as a traveling wave tube, is rigidly supported in axial alignment with the linear electron beam by means of a relatively rigid tubular support structure, as of stainless steel, disposed coaxially surrounding the main body portion of the tube. The main body portion of the tube, which contains the microwave interaction circuit, is formed of an out-of-round transverse section such that out-of-round surface portions of the main body are radially spaced from the inner tubular wall of the support structure to define fluid coolant passageways therebetween for cooling the main body and microwave circuit in use. The main body coolant passageways are connected in series with the flow of coolant between the electron gun, at one end, and the beam collector, at the other end, whereby cooling of the tube is facilitated.
Inventors
- 👤 Bertram G James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:07
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
173 words
In a microwave linear beam tube: electron gun means for forming and projecting a beam of electrons over an elongated linear beam path; beam collector means disposed at the terminal end of the beam path for collecting and dissipating the energy of the beam; a main body structure disposed along said beam path intermediate said electron gun and said electron collector means, said main body structure including microwave circuit means for electromagnetic wave energy interaction with the electron beam to produce output microwave energy, tubular strengthening means disposed surrounding and in contact with said microwave circuit means for rigidly supporting said microwave circuit in axial alignment with said elongated linear electron beam path, said microwave circuit means and said tubular strengthening means having at least a pair of confronting portions spaced apart so as to define at least one body passageway therebetween, and fluid coolant means for directing a flow of fluid coolant through said body passageway and in heat exchanging relation with said microwave circuit means for cooling said microwave circuit means.
Claim 2
Dependent Claim
173 words
In a microwave linear beam tube: electron gun means for forming and projecting a beam of electrons over an elongated linear beam path; beam collector means disposed at the terminal end of the beam path for collecting and dissipating the energy of the beam; a main body structure disposed along said beam path intermediate said electron gun and said electron collector means, said main body structure including microwave circuit means for electromagnetic wave energy interaction with the electron beam to produce output microwave energy, tubular strengthening means disposed surrounding and in contact with said microwave circuit means for rigidly supporting said microwave circuit in axial alignment with said elongated linear electron beam path, said microwave circuit means and said tubular strengthening means having at least a pair of confronting portions spaced apart so as to define at least one body passageway therebetween, and fluid coolant means for directing a flow of fluid coolant through said body passageway and in heat exchanging relation with said microwave circuit means for cooling said microwave circuit means.
Claim 3
Dependent Claim
41 words
The apparatus of claim 1 further including, an electrical solenoid means disposed surrounding said tubular strengthening means for generating an axial beam focussing magnetic field along the linear electron beam path for focussing the electron beam through said microwave circuit means.
Claim 4
Dependent Claim
83 words
The apparatus of claim 1 wherein said microwave circuit means includes an elongated metallic block body portion having a plurality of coupled microwave cavity resonators formed therein to define a microwave circuit for interaction with the electrons of the beam, said elongated metallic block body portion having an out-of-round transverse cross section and out-of-round outer surface and being supported and strengthened via supportive engagement between the out-of-round outer surface of said block body portion and the interior bore of said tubular strengthening means.
Claim 5
Dependent Claim
38 words
The apparatus of claim 3 wherein a plurality of and said body passageways are provided by the region between the inside bore of said tubular strengthening means and the outside out-of-round surface of said elongated block body portion.
Claim 6
Dependent Claim
36 words
The apparatus of claim 3 wherein said out-of-round block body portion includes at least three peripherally spaced longitudinal regions of interference fit between said elongated block body and the interior bore of said tubular strengthening means.
Claim 7
Dependent Claim
72 words
The apparatus of claim 4 wherein said fluid coolant means includes electron gun cooling means for directing an electrically insulative fluid coolant around said electron gun in heat exchanging relation therewith for cooling same, beam collector cooling means for directing said fluid coolant around said beam collector means in heat exchanging relation therewith for cooling same, and means for connecting said coolant passageways to a heat exchanger for cooling said fluid coolant.
Claim 8
Dependent Claim
29 words
The apparatus of claim 6 wherein said body fluid coolant passageways are connected in fluid series flow relation with said electron gun cooling means and said collector cooling means.
Claim 9
Dependent Claim
60 words
The apparatus of claim 7 including electrical solenoid means disposed surrounding said tubular strengthening means for generating an axial beam focus magnetic field along the linear electron beam path for focussing the electron beam through said microwave circuit means, and solenoid cooling means for directing fluid coolant through said beam focus solenoid in heat exchanging relation therewith for cooling thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |