Patent US4672208A successfully refreshed from Google Patents.
US4672208A
Expired / Lapsed
US
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Particle detector crystal and related particle detector assembly
Assignee: Toshiba Corp
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Filing: 1985-11-08
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Granted: 1987-06-09
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Expires: 2005-11-08
Abstract
Abstract A particle detector crystal comprising a diamond-shaped crystal scintillation material having 60 degree and 120 degree apexes and having at least one slot extending from a lower surface of that crystal into the interior of that crystal in a direction substantially parallel to a minor diagonal axis of the crystal a distance sufficient to reduce internal light bounce within that crystal. A plurality of such particle detector crystals are employed in groups of six each arranged with the 60 degree apexes of the crystals in each group positioned contiguous to each other to form a six-pointed star and further employing a plurality of light detectors arranged in a hexagonal array with each detector located above a respective situs of the contiguous 60 degree apexes.
Inventors
- 👤 John F. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:02
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/161; G01T1/164; G01T1/1641; G01T1/1644; G01T1/20; G01T1/202
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
90 words
A particle detector comprising crystal scintillation material which produces light when struck with a particle and which is shaped with substantially parallel upper and lower diamond-shaped surfaces having 60 degree and 120 degree apexes and an interconnecting sidewall, said material being further shaped with at least one slot extending from said lower surface into the interior of said material, in a direction substantially parallel to a diagonal axis of said lower surface interconnecting said 120 degree apexes, a sufficient distance so as to reduce internal light bounce within said material.
Claim 2
Dependent Claim
90 words
A particle detector comprising crystal scintillation material which produces light when struck with a particle and which is shaped with substantially parallel upper and lower diamond-shaped surfaces having 60 degree and 120 degree apexes and an interconnecting sidewall, said material being further shaped with at least one slot extending from said lower surface into the interior of said material, in a direction substantially parallel to a diagonal axis of said lower surface interconnecting said 120 degree apexes, a sufficient distance so as to reduce internal light bounce within said material.
Claim 3
Dependent Claim
17 words
A detector of claim 1 wherein said upper and lower surfaces have the same shape and size.
Claim 4
Dependent Claim
16 words
A detector of claim 2 wherein said sidewall is perpendicular to said upper and lower surfaces.
Claim 5
Dependent Claim
20 words
A detector of claim 1 wherein said slot extends into said material in a direction perpendicular to said lower surface.
Claim 6
Dependent Claim
10 words
A detector of claim 4 having at least two slots.
Claim 7
Dependent Claim
13 words
A detector of claim 5 wherein said slots are parallel to one another.
Claim 8
Dependent Claim
10 words
A detector of claim 1 having at least two slots.
Claim 9
Dependent Claim
13 words
A dector of claim 7 wherein said slots are parallel to each other.
Claim 10
Dependent Claim
153 words
A particle detector assembly comprising a plurality of particle detector crystals, with each crystal comprising scintillation material which produces light when struck with a particle and which is shaped with substantially upper and lower diamondshaped surfaces having 60 degree and 120 apexes and an interconnecting sidewall, each said crystal being further shaped with at least one slot extending from said lower surface into the interior of said crystal in a direction substantially parallel to a diagonal axis of said lower surface interconnecting said 120 degrees apexes, a sufficient distance to reduce internal light bounce within said material, said crystals being arranged in groups of six crystals each with the 60 degree apexes of the crystals in each group positioned contiguous to each other to form a six-pointed star; and a plurallity of light detectors arranged in a hexagonal array with each detector located above a respective situs of said contiguous 60 degree apexes.
Claim 11
Dependent Claim
153 words
A particle detector assembly comprising a plurality of particle detector crystals, with each crystal comprising scintillation material which produces light when struck with a particle and which is shaped with substantially upper and lower diamondshaped surfaces having 60 degree and 120 apexes and an interconnecting sidewall, each said crystal being further shaped with at least one slot extending from said lower surface into the interior of said crystal in a direction substantially parallel to a diagonal axis of said lower surface interconnecting said 120 degrees apexes, a sufficient distance to reduce internal light bounce within said material, said crystals being arranged in groups of six crystals each with the 60 degree apexes of the crystals in each group positioned contiguous to each other to form a six-pointed star; and a plurallity of light detectors arranged in a hexagonal array with each detector located above a respective situs of said contiguous 60 degree apexes.
Claim 12
Dependent Claim
21 words
A detector assembly of claim 9 wherein said upper and lower surfaces of said crystals have the same shape and size.
Claim 13
Dependent Claim
22 words
A dectector of claim 10 wherein said sidewall of each crystal is parallel to said upper and lower surfaces of each crystal.
Claim 14
Dependent Claim
27 words
A detector of claim 9 wherein slots of each crystal extend into the material of that crystal a direction perpendicular to the lower surface of that crystal.
Claim 15
Dependent Claim
15 words
A detector of claim 12 wherein each of said crystals includes at least two slots.
Claim 16
Dependent Claim
16 words
A detector of claim 13 wherein said at least two slots are parallel to each other.
Claim 17
Dependent Claim
15 words
A detector of claim 9 wherein each of said crystals includes at least two slots.
Claim 18
Dependent Claim
15 words
A detector of claim 15 wherein each of said slots is parallel to the other.
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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |