Patent US4121128A successfully refreshed from Google Patents.
US4121128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collective ion accelerator with foil-less beam extraction window
Assignee: United States Department of the Army
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Filing: 1977-08-15
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Granted: 1978-10-17
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Expires: 1997-08-15
Abstract
Abstract Ions are generated in a vacuum condition of an ion accelerator and injectedhrough three aerodynamic windows to atmosphere pressure. In its travel through the windows the coil provides a magnetic field to prevent the ion beam from dissipating while it is traveling to the atmosphere.
Inventors
- 👤 Thomas G. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:05
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/301; H01J5/00; H01J5/02; H01J5/18; H01J7/00; H01J7/14; H01J7/16; H05; H05H; H05H9/00; H05H9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
In an ion beam generating system including an evacuated ion accelerator and an ion extraction window spaced downstream therefrom, the improvement comprising: (a) means for generating electrons for flow through said accelerator; (b) means for injecting ions into said electron flow in said ion accelerator; (c) means for connecting said accelerator to said ion extraction window; and (d) a plurality of aerodynamic windows disposed in serial spaced relation along said connecting means, each said aerodynamic window being disposed for decreasing the pressure in said connecting means in a predetermined stepped relation.
Claim 2
Dependent Claim
91 words
In an ion beam generating system including an evacuated ion accelerator and an ion extraction window spaced downstream therefrom, the improvement comprising: (a) means for generating electrons for flow through said accelerator; (b) means for injecting ions into said electron flow in said ion accelerator; (c) means for connecting said accelerator to said ion extraction window; and (d) a plurality of aerodynamic windows disposed in serial spaced relation along said connecting means, each said aerodynamic window being disposed for decreasing the pressure in said connecting means in a predetermined stepped relation.
Claim 3
Dependent Claim
38 words
In a system as set forth in claim 1 further comprising magnetic means connected around said connecting means, so as to provide a magnetic field to prevent said ion beam from dissipating before it reaches the atmospheric pressure.
Claim 4
Dependent Claim
33 words
In a system as set forth in claim 2 further having a first vacuum pump connected to said connecting means betweenn said ion accelerator and the first one of said spaced aerodynamic windows.
Claim 5
Dependent Claim
19 words
In a system as set forth in claim 3 wherein said plurality of aerodynamic windows comprises three aerodynamic windows.
Claim 6
Dependent Claim
62 words
In a system as set forth in claim 4 including a second vacuum pump connected to said connecting means intermediate the first and second of said three aerodynamic windows, and a third vacuum pump connected to said connecting means intermediate the second and third of said three aerodynamic windows, and a valve disposed between each said vacuum pump and said connecting means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |