US4171482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass spectrometer for ultra-rapid scanning
Assignee: Cameca SAS
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Filing: 1977-12-27
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Granted: 1979-10-16
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Expires: 1997-12-27
Abstract
Abstract The invention relates to a mass spectrometer for rapid scanning. A magnetic sector focuses a collimated beam containing the various ion species in a focal plane. The focused beams reach this focal plane at an angle of 45°. The beams emerging from this focal plane are refocused in an electrostatic deflector having parallel plates. One of these plates is provided with a slit through which the beams are received. Scanning is brought about by varying the voltage applied to the electrostatic deflector.
Inventors
- 👤 Jean Vastel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/28; H01J49/284
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
Mass spectrometer comprising: magnetic sector means for focussing ion species onto a focal plane, electrostatic deviator means having parallel electrodes, electrical means supplying a variable bias voltage across said electrodes, and collector means arranged for selectively receiving one of said ion species emerging from said electrostatic deviator means; said ion species forming focussed beams reaching along a line of said focal plane, the angle of incidence of said beams being substantially equal to 45°; one of said electrodes being provided with an elongated slit extending along said line for transmitting said focussed beams; said collector means being arranged on said line near one end of said elongated slit.
Claim 2
Dependent Claim
108 words
Mass spectrometer comprising: magnetic sector means for focussing ion species onto a focal plane, electrostatic deviator means having parallel electrodes, electrical means supplying a variable bias voltage across said electrodes, and collector means arranged for selectively receiving one of said ion species emerging from said electrostatic deviator means; said ion species forming focussed beams reaching along a line of said focal plane, the angle of incidence of said beams being substantially equal to 45°; one of said electrodes being provided with an elongated slit extending along said line for transmitting said focussed beams; said collector means being arranged on said line near one end of said elongated slit.
Claim 3
Dependent Claim
18 words
Mass spectrometer is claimed in claim 1, wherein said electrodes are planar and parallel to said focal plane.
Claim 4
Dependent Claim
41 words
Mass spectrometer as claimed in claim 1, wherein said magnetic sector means have an input face at an angle of substantially 45° with said focal plane; the ion species received by said input face forming a beam collimated by a lens.
Claim 5
Dependent Claim
26 words
Mass spectrometer as claimed in claim 3, wherein the axis of said collimated beam intersects said input face at a point lying in said focal plane.
References Cited (Backward Citations)
US3194961A
Cited
US3475604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |