US4193000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation detector adapted for use with a scanner
Assignee: Toshiba Corp
•
Filing: 1977-11-23
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Granted: 1980-03-11
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Expires: 1997-11-23
Abstract
Abstract A compact single- or multi-channel radiation detector capable of sending forth a large and stable output signal by being operated in a proportional region which comprises a single or a plurality of electrode assemblies each prepared by inserting between a pair of mutually facing parallel high voltage electrodes an electric charge-collecting electrode having a plurality of metal wires spatially arranged in a plane parallel with said paired high voltage electrodes, and wherein the single or plural electrode assemblies are received in a case provided with a radiation inlet section and filled with a gaseous element mainly consisting of a rare gas such as argon or xenon.
Inventors
- 👤 Shimpey Shirayama
- 👤 Chikara Konagai
- 👤 Michitaka Terasawa
- 👤 Hironobu Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:11
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/06; H01J47/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
A radiation detector which comprises an electric charge-collecting electrode constructed by arranging a plurality of fine metal wires in substantially the same plane; a pair of high voltage electrodes disposed substantially parallel with both sides of the electric charge-collecting electrode; and a case designed to receive the electric charge-collecting electrode and paired high voltage electrodes, filled with a gaseous element substantially impervious to radiation and provided with a radiation supply section enabling radiation to be introduced substantially parallel with said plane of the electric charge-collecting electrode.
Claim 2
Dependent Claim
86 words
A radiation detector which comprises an electric charge-collecting electrode constructed by arranging a plurality of fine metal wires in substantially the same plane; a pair of high voltage electrodes disposed substantially parallel with both sides of the electric charge-collecting electrode; and a case designed to receive the electric charge-collecting electrode and paired high voltage electrodes, filled with a gaseous element substantially impervious to radiation and provided with a radiation supply section enabling radiation to be introduced substantially parallel with said plane of the electric charge-collecting electrode.
Claim 3
Dependent Claim
35 words
The radiation detector according to claim 1, wherein the gaseous element sealed in the case is mainly formed of at least one kind selected from the group consisting of rare gases xenon, argon and krypton.
Claim 4
Dependent Claim
30 words
The radiation detector according to claim 1, which is operated in a proportional region, with the gaseous element sealed in the case at a pressure of 5 to 10 atm.
Claim 5
Dependent Claim
37 words
The radiation detector according to claim 1, wherein fine metal wires constituting the electric charge-collecting electrode have a diameter of 10 to 100 microns and are arranged substantially parallel at a space of 1 to 5 millimeters.
Claim 6
Dependent Claim
28 words
The radiation detector according to claim 1, wherein the high voltage electrode is made of at least one selected from the group consisting of tantalum, tungsten and molybdenum.
Claim 7
Dependent Claim
28 words
The radiation detector according to claim 1, wherein the high voltage electrode is made of at least one selected from the group consisting of tantalum, tungsten and molybdenum.
Claim 8
Dependent Claim
103 words
A radiation detector which comprises a plurality of substantially parallel arranged high voltage electrodes; a plurality of electric charge-collecting electrodes, each of which comprises a plurality of fine metal wires stretched in substantially the same plane and is disposed midway between every two adjacent high voltage electrodes arranged substantially parallel with said plane; and a case designed to receive the high voltage electrodes and electric charge-collecting electrodes, filled with a gaseous element which is considered to be impervious to radiation, and provided with a radiation supply section enabling radiation to be introduced substantially parallel with the plane of each respective electric charge-collecting electrode.
Claim 9
Dependent Claim
103 words
A radiation detector which comprises a plurality of substantially parallel arranged high voltage electrodes; a plurality of electric charge-collecting electrodes, each of which comprises a plurality of fine metal wires stretched in substantially the same plane and is disposed midway between every two adjacent high voltage electrodes arranged substantially parallel with said plane; and a case designed to receive the high voltage electrodes and electric charge-collecting electrodes, filled with a gaseous element which is considered to be impervious to radiation, and provided with a radiation supply section enabling radiation to be introduced substantially parallel with the plane of each respective electric charge-collecting electrode.
Claim 10
Dependent Claim
33 words
The radiation detector according to claim 7, wherein the gaseous element sealed in the case is mainly formed of at least one selected from the group of rare gases xenon, argon and krypton.
Claim 11
Dependent Claim
27 words
The radiation detector according to claim 7, which is operated in a proportional region with the gaseous element sealed at a pressure of 5 to 10 atm.
Claim 12
Dependent Claim
37 words
The radiation detector according to claim 7, wherein fine metal wires constituting the electric charge-collecting electrode have a diameter of 10 to 100 microns, and are arranged substantially parallel at a space of 1 to 5 millimeters.
Claim 13
Dependent Claim
129 words
A radiation detector which comprises a charge-collecting electrode having a plurality of fine metal wires disposed in substantially a single plane; a pair of high voltage electrodes extending substantially parallel with and disposed in a manner to sandwich the charge-collecting electrode; and a casing which houses the charge-collecting electrode; and the high voltage electrodes, contain 5 to 10 atms. of a gaseous material including as the main component at least one element selected from xenon, argon and krypton which are substantially opaque to radiation, and is provided with a radiation inlet port permitting the radiation to enter substantially parallel with the single plane of the charge-collecting electrode; wherein the voltage applied between the charge-collecting electrode and the high voltage electrodes permits the detector to operate in a proportional region.
Claim 14
Dependent Claim
129 words
A radiation detector which comprises a charge-collecting electrode having a plurality of fine metal wires disposed in substantially a single plane; a pair of high voltage electrodes extending substantially parallel with and disposed in a manner to sandwich the charge-collecting electrode; and a casing which houses the charge-collecting electrode; and the high voltage electrodes, contain 5 to 10 atms. of a gaseous material including as the main component at least one element selected from xenon, argon and krypton which are substantially opaque to radiation, and is provided with a radiation inlet port permitting the radiation to enter substantially parallel with the single plane of the charge-collecting electrode; wherein the voltage applied between the charge-collecting electrode and the high voltage electrodes permits the detector to operate in a proportional region.
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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |