Patent US3793550A successfully refreshed from Google Patents.
US3793550A
Expired / Lapsed
US
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Electrode configuration for particle acceleration tube
Assignee: Radiation Dynamics Inc
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Filing: 1972-03-17
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Granted: 1974-02-19
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Expires: 1992-03-17
Abstract
Abstract In a high vacuum particle acceleration tube of the type in which a series of spaced apertured electrodes define the acceleration path, the apertured electrodes are provided with circular depressions of asymmetric V-shaped cross-section. The asymmetry is such that adjacent electrodes are closer to one another on the radially inward side of the V than on the radially outward side. Thus, arcing, if it occurs, is directed inwardly of the V and metal vapor is not deposited on the insulator. In addition, the V-configured recess acts to intercept high energy particles which are scattered out of the main beam, thereby protecting the glass insulators at the electrode periphery from radiation damage.
Inventors
- 👤 C Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:37
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/06; H05; H05H; H05H5/00; H05H5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A high-vacuum particle accelerator tube of the type in which successive apertured electrodes are spaced by insulators at their peripheries and have their apertures aligned to define a path for an accelerated particle beam along the length of the tube, said tube being characterized in that each electrode includes a continuous recess disposed about said aperture, the recesses of suscessive electrodes being aligned in a direction parallel to the alignment of said apertures, said recess having an asymmetrical cross-section configured such that the closest points between successive electrodes are located along the side of the recesses of those electrodes which is closest to said apertures.
Claim 2
Dependent Claim
105 words
A high-vacuum particle accelerator tube of the type in which successive apertured electrodes are spaced by insulators at their peripheries and have their apertures aligned to define a path for an accelerated particle beam along the length of the tube, said tube being characterized in that each electrode includes a continuous recess disposed about said aperture, the recesses of suscessive electrodes being aligned in a direction parallel to the alignment of said apertures, said recess having an asymmetrical cross-section configured such that the closest points between successive electrodes are located along the side of the recesses of those electrodes which is closest to said apertures.
Claim 3
Dependent Claim
44 words
The combination according to claim 1 wherein said recess includes an apex about which said recess is asymmetrical, successive electrodes being positioned such that the apex of the recess of each electrode extends a short distance into the recess of the next successive electrode.
Claim 4
Dependent Claim
50 words
The combination according to claim 2 wherein said recess has an asymmetrical V cross-section, the leg of the V closest to said aperture being shorter than the leg disposed more remote from said aperture, said closest leg subtending a smaller angle with said particle beam path than said remote leg.
Claim 5
Dependent Claim
50 words
The combination according to claim 1 wherein said recess has an asymmetrical V cross-section, the leg of the V closest to said aperture being shorter than the leg disposed more remote from said aperture, said closest leg subtending a smaller angle with said particle beam path than said remote leg.
Claim 6
Independent Claim
122 words
A device for accelerating ions injected thereinto in a downstream direction, said device comprising an acceleration tube having a series of alternating insulating rings and apertured electrodes, and means for applying successive voltage increments across adjacent electrodes to provide a substantially uniform electric field in said acceleration tube, wherein said apertured electrodes include a flat upstream surface in which a continuing downstream-directed recess is formed concentrically about the electrode aperture, the recesses of said electrodes being aligned in a downstream direction, each recess having an asymmetric cross-sectional configuration about an apex such that the side of said recess between said apex and said aperture is closer to the next downstream electrode than is the side of said recess remote from said aperture.
Claim 7
Independent Claim
122 words
A device for accelerating ions injected thereinto in a downstream direction, said device comprising an acceleration tube having a series of alternating insulating rings and apertured electrodes, and means for applying successive voltage increments across adjacent electrodes to provide a substantially uniform electric field in said acceleration tube, wherein said apertured electrodes include a flat upstream surface in which a continuing downstream-directed recess is formed concentrically about the electrode aperture, the recesses of said electrodes being aligned in a downstream direction, each recess having an asymmetric cross-sectional configuration about an apex such that the side of said recess between said apex and said aperture is closer to the next downstream electrode than is the side of said recess remote from said aperture.
Claim 8
Dependent Claim
26 words
The device according to claim 5 wherein the apex of each electrode recess extends a short distance into the recess region of the next downstream electrode.
Claim 9
Dependent Claim
43 words
The device according to claim 6 whereIn the cross-section of said recess is in the form of a V which is asymmetric about the apex, the side of the V closest to the aperture being shorter than the side remote from said aperture.
Claim 10
Independent Claim
138 words
A device for accelerating charged particles comprising: an acceleration tube having an upstream end and a downstream end and comprising a multiplicity of alternating apertured electrodes and insulating rings, the apertures of said electrodes being axially aligned to define a path for said charged particles therethrough between the upstream and downstream ends of said tube; means for applying successive voltage increments across adjacent electrodes to provide an electric field between the upstream and downstream ends of said tube; and means for injecting a beam of said charged particles into said tube at the upstream end thereof and directed generally toward the downstream end thereof; wherein each electrode includes a continuous recess disposed concentrically about said aperture and having an asymmetric V-configured cross-section, the apices of the recesses in successive electrodes being aligned along the length of the tube.
Claim 11
Independent Claim
138 words
A device for accelerating charged particles comprising: an acceleration tube having an upstream end and a downstream end and comprising a multiplicity of alternating apertured electrodes and insulating rings, the apertures of said electrodes being axially aligned to define a path for said charged particles therethrough between the upstream and downstream ends of said tube; means for applying successive voltage increments across adjacent electrodes to provide an electric field between the upstream and downstream ends of said tube; and means for injecting a beam of said charged particles into said tube at the upstream end thereof and directed generally toward the downstream end thereof; wherein each electrode includes a continuous recess disposed concentrically about said aperture and having an asymmetric V-configured cross-section, the apices of the recesses in successive electrodes being aligned along the length of the tube.
Claim 12
Dependent Claim
36 words
The device according to claim 8 wherein said tube is part of a tandem-type accelerator further comprising an electron stripper element disposed at the downstream end of said tube and toward which said beam is focused.
References Cited (Backward Citations)
US3458743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |