Patent US3641446A successfully refreshed from Google Patents.
US3641446A
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Polyergic cyclotron
Assignee: United States Department of the Air Force
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Filing: 1969-12-18
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Granted: 1972-02-08
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Expires: 1989-12-18
Abstract
Abstract A device for the production of a multiple energy proton beam comprising a negative hydrogen ion cyclotron with stripping foils placed at different radial and azimuthal positions. The negatively charged hydrogen ions at the various energy levels represented by the radial positions of the foils are stripped of their electrons thereby becoming protons which reverse their direction of curvature because of the reversed polarity and exit from the cyclotron along paths that, with proper azimuthal positioning of the foils, meet at a single point outside the cyclotron. A circular combining magnet centered on this point bends the proton trajectories as required to continue along a common path thus creating the multiple energy or polyergic beam.
Inventors
- 👤 Hayden S Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:55
CPC Classifications
H; H05; H05H; H05H13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
Apparatus for producing a polyergic beam of protons comprising: a negative hydrogen ion cyclotron having a plurality of stripping foils positioned at different radial positions for converting negative hydrogen ions at different energies into protons at different energies which follow trajectories of reversed curvature out of the cyclotron, said foils having such azimuthal locations that the trajectories of the exiting protons converge toward a point outside said cyclotron; and means at said point for bending said converging trajectories into a common polyergic beam.
Claim 2
Dependent Claim
83 words
Apparatus for producing a polyergic beam of protons comprising: a negative hydrogen ion cyclotron having a plurality of stripping foils positioned at different radial positions for converting negative hydrogen ions at different energies into protons at different energies which follow trajectories of reversed curvature out of the cyclotron, said foils having such azimuthal locations that the trajectories of the exiting protons converge toward a point outside said cyclotron; and means at said point for bending said converging trajectories into a common polyergic beam.
Claim 3
Dependent Claim
84 words
Apparatus as claimed in claim 1 in which said bending means comprises means producing a uniform constant magnetic field having a circular edge centered on said point, the product of the flux density of said field and the radius of said circular edge having such value, depending upon the angular separation of any two of said converging proton trajectories and the energies of the protons therein, that all of said converging trajectories are turned into collinearity with a radial line extending from said point.
Claim 4
Dependent Claim
101 words
Apparatus as claimed in claim 1 in which the angular space of the cyclotron has three sectors with the particle-accelerating electrode structure of the cyclotron in one of the sectors and said stripping foils in another; and a second set of stripping foils in the remaining sector having different radial and azimuthal positions as required to produce protons at various energies which exit the cyclotron along trajectories that converge on a second point outside the cyclotron in the same manner as the first-named foils, and means at said second point for bending the converging trajectories into a second common polyergic beam.
References Cited (Backward Citations)
US2872574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |