US4942302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large area solid state nucler detector with high spatial resolution
Assignee: Fibertek Inc
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Filing: 1988-02-09
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Granted: 1990-07-17
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Expires: 2008-02-09
Abstract
Abstract A large area nuclear detection system with high resolution includes a sensor formed of scintillating optical fibers and a remotely located detector comprising at least a pair of microchannel plate photomultiplier tubes, with the sensitive area of the sensor being many times the area of the detectors. Two linear arrays of optical fibers are arranged orthogonally to define a sensor matrix of rows and columns of fibers. Nuclear radiation from a particle at the sensor is converted to optical energy by the sensor. A microchannel PMT is connected with each array for measuring the optical energy output of the fibers thereof to determine the row and column location of the nuclear particle in accordance with the quantity of energy received from the fibers. Thus, nuclear radiation can be detected over a large area with a high degree of accuracy and resolution. A characterizing feature of the detection system is the conversion of the output of large orthogonally arranged layers of scintillator elements from a long and narrow rectangular format to a square or round output format to match the detector which typically has round or square sensitive areas of a few centimeters.
Inventors
- 👤 Walter Koechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:28
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/201; G01T1/203
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
246 words
A nuclear radiation detector system comprising: a first set of optical fibers; a second set of optical fibers; a first predetermined section of each of said fibers in said first set arranged side by side in a common plane to form a first linear array; a first predetermined section of each of said fibers in said second set arranged side-by-side in a common plane to form a second linear array; said first and second linear arrays being arranged orthogonally to define a matrix of rows and columns of fibers for sensing the presence of a nuclear particle and converting the nuclear radiation energy thereof to optical energy; a second predetermined section of each of said fibers in said first set arranged in a bundle to form a first planar array wherein an open end of each of said fibers from an end surface of said first planar array to provide an output for optical energy generated in said first set of optical fibers; a second predetermined section of each of said fibers in said second set arranged in a bundle to form a second planar array wherein an open end of each of said fibers form an end surface of said second planar array to provide an output for optical energy generated in said second set of optical fibers; and; detector means coupled to said first and second planar arrays for measuring the optical energy output thereof to determine the location of the sensed nuclear particle.
Claim 2
Dependent Claim
246 words
A nuclear radiation detector system comprising: a first set of optical fibers; a second set of optical fibers; a first predetermined section of each of said fibers in said first set arranged side by side in a common plane to form a first linear array; a first predetermined section of each of said fibers in said second set arranged side-by-side in a common plane to form a second linear array; said first and second linear arrays being arranged orthogonally to define a matrix of rows and columns of fibers for sensing the presence of a nuclear particle and converting the nuclear radiation energy thereof to optical energy; a second predetermined section of each of said fibers in said first set arranged in a bundle to form a first planar array wherein an open end of each of said fibers from an end surface of said first planar array to provide an output for optical energy generated in said first set of optical fibers; a second predetermined section of each of said fibers in said second set arranged in a bundle to form a second planar array wherein an open end of each of said fibers form an end surface of said second planar array to provide an output for optical energy generated in said second set of optical fibers; and; detector means coupled to said first and second planar arrays for measuring the optical energy output thereof to determine the location of the sensed nuclear particle.
Claim 3
Dependent Claim
24 words
The nuclear radiation detector system of claim 1, wherein each of said fibers in said first and second sets are formed of scintillator material.
Claim 4
Dependent Claim
31 words
The nuclear radiation detector system of claim 2, wherein each of the fibers of said first set of fibers have closed ends that form the edge of the first linear array.
Claim 5
Dependent Claim
35 words
The nuclear radiation detector system of claim 3, wherein the surface area defined by said first and second linear arrays is greater than the surface area formed by the first and second planar arrays respectively.
Claim 6
Dependent Claim
25 words
Apparatus as defined in claim 1, and further comprising coincidence circuit means connected with said detector means for sensing a reading to register particle presence.
Claim 7
Dependent Claim
17 words
Apparatus as defined in claim 5, wherein all of said optical fibers have a square cross-sectional configuration.
Claim 8
Dependent Claim
24 words
Apparatus as defined in claim 6, wherein the length of the sides of said square cross-sectional configuration is between 0.5 mm to 1.4 mm.
Claim 9
Dependent Claim
28 words
Apparatus as defined in claim 5, wherein said detector means includes a plurality of detector elements each connected with one optical fiber for measuring the optical energy therefrom.
Claim 10
Dependent Claim
20 words
Apparatus as defined in claim 8, wherein detector means includes means for converting the measured optical energy into digital data.
Claim 11
Dependent Claim
50 words
Apparatus as defined in claim 5, wherein said detector means comprises a microchannel plate, each channel thereof being connected with one optical fiber, respectively, said detector means comparing the optical energy from said fibers to determine the particle location in accordance with the strength of optical energy from said fibers.
Claim 12
Dependent Claim
16 words
Apparatus as defined in claim 10, wherein each of said microchannel plates comprises a photomultiplier tube.
Claim 13
Dependent Claim
31 words
Apparatus as defined in claim 11, wherein said first and second linear arrays are arranged in a contiguous sandwiched relation to define sensor means for sensing particle location in two dimensions.
Claim 14
Dependent Claim
31 words
Apparatus as defined in claim 12, wherein a plurality of contiguous pairs of first and second linear arrays are arranged in adjacent modules to increase the area of said sensor means.
Claim 15
Dependent Claim
35 words
Apparatus as defined in claim 12, wherein a pair of contiguous first and second linear arrays are arranged in spaced parallel relation to define sensor means for sensing particle location and direction in three dimensions.
Claim 16
Dependent Claim
54 words
Apparatus as defined in claim 5, wherein six sets of said first and second linear arrays are spatially arranged to define the walls of a cube, each of said sets comprising first and second orthogonal linear arrays of fibers connected with first and second detectors, respectively, whereby omnidirectional particle location and direction is detected.
References Cited (Backward Citations)
US3717762A
Cited
US3965353A
Cited
US4180736A
Cited
US4280125A
Cited
US4437002A
Cited
JPS5776466A
Cited
US4437007A
Cited
JPS60159675A
Cited
JPS60207083A
Cited
WO1985004959A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |