US3758781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation and particle detector and amplifier
Assignee: Individual
•
Filing: 1969-07-15
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Granted: 1973-09-11
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Expires: 1989-07-15
Abstract
Abstract A radiation or charged particle detector which incorporates a channel multiplier structure to amplify the detected rays or particles, the channel multiplier structure having a support multiplying element, the element having a longitudinal slot formed along one side thereof, the element supporting a pair of plates positioned contiguous with the slot, the plates being adapted to funnel the particles or rays to be detected into the slotted aperture and ultimately the element, thus creating an effectively wide aperture detector of the windowless type.
Inventors
- 👤 K Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:16
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
Apparatus for detecting radiation and charged particles comprising: a longitudinal electron multiplier, a first coating of conductive and electron emissive material on the entire interior surface of said multiplier; an input aperture communicating with the interior of said multiplier and extending substantially the full longitudinal dimension of said multiplier and having a transverse dimension at least an order of magnitude less than said longitudinal dimension; funnel means congruent to said input aperture and coMmunicating with said input aperture, said funnel means comprising plates having input edges and output edges, said output edges being positioned adjacent said input aperture and spaced one from the other, the spacing between said input edges being greater than the spacing between said output the interior of said funnel means having a second coating of conductive and electron emissive material in communication with said first coating; output means in communication with said electron multiplier; and biasing means for accelerating charged particles through said multiplier toward said output means.
Claim 2
Dependent Claim
162 words
Apparatus for detecting radiation and charged particles comprising: a longitudinal electron multiplier, a first coating of conductive and electron emissive material on the entire interior surface of said multiplier; an input aperture communicating with the interior of said multiplier and extending substantially the full longitudinal dimension of said multiplier and having a transverse dimension at least an order of magnitude less than said longitudinal dimension; funnel means congruent to said input aperture and coMmunicating with said input aperture, said funnel means comprising plates having input edges and output edges, said output edges being positioned adjacent said input aperture and spaced one from the other, the spacing between said input edges being greater than the spacing between said output the interior of said funnel means having a second coating of conductive and electron emissive material in communication with said first coating; output means in communication with said electron multiplier; and biasing means for accelerating charged particles through said multiplier toward said output means.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 wherein said output edges are of a length at least as great as the longitudinal dimension of said input aperture.
Claim 4
Dependent Claim
28 words
The apparatus of claim 2 further including means for establishing electrostatic fields for driving secondary electrons emitted from said plate emissive surfaces toward said channel element emissive surface.
Claim 5
Dependent Claim
35 words
Apparatus of claim 1 wherein said output means is interposed between the ends of said electron multiplier and said biasing means establishes an electric field which causes charged particles to travel toward said output means.
Claim 6
Dependent Claim
26 words
The apparatus of claim 4 wherein said output means comprises a channel multiplier having one end contiguous with said electron multiplier and has a nonlinear axis.
Claim 7
Dependent Claim
24 words
The apparatus of claim 5 wherein said funnel means includes first and second conductive surface connected to biasing means to minimize potential well buildup.
Claim 8
Dependent Claim
12 words
The apparatus of claim 5 wherein said channel element axis is curved.
Claim 9
Dependent Claim
18 words
The apparatus of claim 1 wherein said output means is positioned adjacent one end of said electron multiplier.
Claim 10
Dependent Claim
19 words
The apparatus of claim 8 further including a second output means at the other end of said electron multiplier.
Claim 11
Dependent Claim
14 words
The apparatus of claim 8 wherein said output means is a first channel multiplier.
Claim 12
Dependent Claim
22 words
The apparatus of claim 10 wherein said first and second output means are channel multipliers having nonlinear axes for minimizing feedback effects.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |