US3703638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization radiation detector system for determining position of the radiation
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1970-05-22
•
Granted: 1972-11-21
•
Expires: 1990-05-22
Abstract
Abstract An X- and gamma -radiation detector including a plurality of detecting cells. Each cell comprises an anode and two halfcathodes, the half-cathodes consisting of flat plates. The respective half-cathodes are arranged as othogonal elements so that by applying matrix technique the output of a particular cell can be selected to localize the radiation detected.
Inventors
- 👤 Robert Allemand
- 👤 Christian Brey
- 👤 Jean Jacobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:58
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2921; G01T1/2935; H; H01; H01J; H01J47/00; H01J47/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
203 words
An ionizing detector system comprising an enclosure of substantially uniform thickness, a fluid in said enclosure, a plurality N X n of detector cells within the enclosure, (where N is a predetermined integer greater than 1 and n is a predetermined integer greater than 1) each cell comprising an anode wire, a first flat half-cathode and a second flat half-cathode located on the other side of the anode wire with respect to the first half-cathode, a first group of N generally flat metal strips providing the first half-cathodes of respective groups of n cells and a second group of n generally flat metal strips providing the second half-cathodes of respective groups of N cells, N X n counting means each arranged to count pulses from a respective one of the N X n detector cells, N first communication paths each connecting a respective strip of the first group to n counting means through coincidence means, n second communication paths each connecting a respective strip of the second group to N counting means through said coincidence means, and means for applying between the half-cathodes and the anode of each detector cell a D.C. potential difference such that each cell operates as a proportional counter.
Claim 2
Dependent Claim
203 words
An ionizing detector system comprising an enclosure of substantially uniform thickness, a fluid in said enclosure, a plurality N X n of detector cells within the enclosure, (where N is a predetermined integer greater than 1 and n is a predetermined integer greater than 1) each cell comprising an anode wire, a first flat half-cathode and a second flat half-cathode located on the other side of the anode wire with respect to the first half-cathode, a first group of N generally flat metal strips providing the first half-cathodes of respective groups of n cells and a second group of n generally flat metal strips providing the second half-cathodes of respective groups of N cells, N X n counting means each arranged to count pulses from a respective one of the N X n detector cells, N first communication paths each connecting a respective strip of the first group to n counting means through coincidence means, n second communication paths each connecting a respective strip of the second group to N counting means through said coincidence means, and means for applying between the half-cathodes and the anode of each detector cell a D.C. potential difference such that each cell operates as a proportional counter.
Claim 3
Dependent Claim
203 words
An ionizing detector system comprising an enclosure of substantially uniform thickness, a fluid in said enclosure, a plurality N X n of detector cells within the enclosure, (where N is a predetermined integer greater than 1 and n is a predetermined integer greater than 1) each cell comprising an anode wire, a first flat half-cathode and a second flat halfcathode located on the other side of the anode wire with respect to the first half-cathode, a first group of N generally flat metal strips providing the first half-cathodes of respective groups of n cells and a second group of n generally flat metal strips providing the second half-cathodes of respective groups of N cells, N X n counting means each arranged to count pulses from a respective one of the N X n detector cells, N first communication paths each connecting a respective strip of the first group to n counting means through coincidence means, n second communication paths each connecting a respective strip of the second group to N counting means through said coincidence means, and means for applying between the half-cathodes and the anode of each detector cell a D.C. potential difference such that each cell operates as a proportional counter.
Claim 4
Dependent Claim
203 words
An ionizing detector system comprising an enclosure of substantially uniform thickness, a fluid in said enclosure, a plurality N X n of detector cells within the enclosure, (where N is a predetermined integer greater than 1 and n is a predetermined integer greater than 1) each cell comprising an anode wire, a first flat half-cathode and a second flat halfcathode located on the other side of the anode wire with respect to the first half-cathode, a first group of N generally flat metal strips providing the first half-cathodes of respective groups of n cells and a second group of n generally flat metal strips providing the second half-cathodes of respective groups of N cells, N X n counting means each arranged to count pulses from a respective one of the N X n detector cells, N first communication paths each connecting a respective strip of the first group to n counting means through coincidence means, n second communication paths each connecting a respective strip of the second group to N counting means through said coincidence means, and means for applying between the half-cathodes and the anode of each detector cell a D.C. potential difference such that each cell operates as a proportional counter.
Claim 5
Dependent Claim
86 words
A detector system according to claim 1, including inhibiting means for selecting one first path and one second path only in response to each ionizing event, comprising, on each first or second path, discriminator means and blocking means, said discriminator means delivering a signal when a pulse exceeding a predetermined threshold is applied thereto and said blocking means blocking transmission of pulses for a predetermined time period by all other first or second paths, respectively, in response to reception of said signal by the discriminator means.
Claim 6
Dependent Claim
82 words
A detector system according to claim 1, each counting means having an address y 1 + lambda c, wherein 1 is an even number between 1 and N designating the row associated with the cell, c is an even number between 1 and n designating the column associated with the cell, and lambda is a predetermined integer greater than N and including coincidence means delivering The address y of the corresponding counting means in response to any combination of row and column.
Claim 7
Dependent Claim
27 words
A system as set forth in claim 1 wherein the half-cathodes are brought to d.c. earth potential, while the anode is brought to the d.c. high voltage.
Claim 8
Dependent Claim
28 words
A system as set forth in claim 1 wherein the two half-cathodes have substantially the same area and are disposed at the same distance from the filamentary anode.
Claim 9
Dependent Claim
21 words
A system as set forth in claim 1 wherein the anodes are formed by at least one layer of parallel wires.
Claim 10
Dependent Claim
49 words
A system as set forth in claim 1 wherein the first half-cathodes of the cells are a group of metal strips parallel with a first direction and the second half-cathodes are a group of strips located on the other side of the anodes and parallel to a second direction.
References Cited (Backward Citations)
US2877371A
Cited
US3359421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |