US3784858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion sources
Assignee: Individual
•
Filing: 1972-11-24
•
Granted: 1974-01-08
•
Expires: 1992-11-24
Abstract
Abstract An ion source comprising a right-circular cylindrical cathode having two anode rods extending through the cylinder and symmetrically disposed about its axis. An ion beam outlet aperture is formed in the cylindrical wall of the cathode, and an inlet is provided in the cathode for introducing a gas therein.
Inventors
- 👤 J Franks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:10
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
An ion source comprising a hollow cathode having a wall, the wall having an ion beam outlet aperture formed therein, 2n anodes in the cylinder and symmetrically disposed about the axis thereof where n is an integer, means for coupling the cathode and the anodes to a source of an electric potential for the ion source, the cathode further including inlet means for introducing a gas into the cylinder.
Claim 2
Dependent Claim
69 words
An ion source comprising a hollow cathode having a wall, the wall having an ion beam outlet aperture formed therein, 2n anodes in the cylinder and symmetrically disposed about the axis thereof where n is an integer, means for coupling the cathode and the anodes to a source of an electric potential for the ion source, the cathode further including inlet means for introducing a gas into the cylinder.
Claim 3
Dependent Claim
26 words
An ion source according to claim 1, wherein said gas inlet means is provided in said cathode substantially opposite said outlet aperture and axially displaced therefrom.
Claim 4
Dependent Claim
21 words
An ion source according to claim 1, wherein the cathode is cylindrical and the said wall is the cylindrical wall thereof.
Claim 5
Dependent Claim
30 words
An ion source according to claim 3, wherein said gas inlet means is provided in said cylindrical wall of said cathode substantially opposite said outlet aperture and axially displaced therefrom.
Claim 6
Dependent Claim
17 words
An ion source according to claim 2, wherein said anodes are in the form of elongate rods.
Claim 7
Dependent Claim
13 words
An ion source according to claim 5, wherein there are two anode rods.
Claim 8
Dependent Claim
25 words
An ion source according to claim 6, wherein said outlet aperture is formed about a plane substantially normal to the plane of the anode rods.
Claim 9
Dependent Claim
15 words
An ion source according to claim 5, wherein said outlet aperture is an elongate slot.
Claim 10
Dependent Claim
34 words
An ion source according to claim 7, further comprising two caps mounted on the ends of said cylinder and electrically coupled thereto, said end caps having apertures formed therein through which the anodes protrude.
Claim 11
Dependent Claim
37 words
An ion source according to claim 9, further comprising two plates of insulating material mounted on and externally of said two end caps respectively, said insulating means providing a means for maintaining the anode rods in position.
Claim 12
Dependent Claim
31 words
An ion source according to claim 10, further comprising a chamber, means for mounting the source in the chamber, evacuating means, and means for coupling the chamber to the evacuating means.
Claim 13
Dependent Claim
29 words
An ion source according to claim 11, wherein said chamber comprises an inlet and means are provided for coupling said inlet to said gas inlet means in said cylinder.
Claim 14
Dependent Claim
15 words
An ion source according to claim 12, wherein said outlet aperture is an elongate slot.
References Cited (Backward Citations)
US3484602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |