Charged particle track detector
US-10795035-B2 · Oct 6, 2020 · US
Gamma ray detector
US10996348B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10996348-B2 |
| Application number | US-201916394032-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2019 |
| Priority date | Apr 26, 2018 |
| Publication date | May 4, 2021 |
| Grant date | May 4, 2021 |
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- Title
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Abstract
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A gamma ray detector is a detector detecting gamma rays and includes a photomultiplier tube having an entrance window and a photoelectric surface. The entrance window is a Cherenkov radiator. The photoelectric surface is formed on a vacuum side of the entrance window via an intermediate layer. The thickness of the intermediate layer is equal to or less than the wavelength of Cherenkov light emitted by an interaction of the gamma rays with the entrance window.
First claim
Opening claim text (preview).
What is claimed is: 1. A gamma ray detector detecting gamma rays, comprising: a photomultiplier tube having an entrance window and a photoelectric surface, wherein the entrance window is a Cherenkov radiator, the photoelectric surface is formed on a vacuum side surface of the entrance window via an intermediate layer, and a thickness of the intermediate layer is equal to or less than a wavelength of Cherenkov light emitted by an interaction of the gamma rays with the entrance window. 2. The gamma ray detector according to claim 1 , wherein the intermediate layer contains at least one of Al 2 O 3 , ZnO, HfO 2 , and TiO 2 . 3. The gamma ray detector according to claim 2 , wherein the entrance window which is a Cherenkov radiator contains at least one of PbF 2 , PbWO 4 , PbO, and lead glass. 4. The gamma ray detector according to claim 2 , wherein the thickness of the entrance window which is a Cherenkov radiator is a thickness capable of shielding the gamma rays so that the transmittance of the gamma rays is equal to or less than a specified value. 5. The gamma ray detector according to claim 1 , wherein the entrance window which is a Cherenkov radiator contains at least one of PbF 2 , PbWO 4 , PbO, and lead glass. 6. The gamma ray detector according to claim 5 , wherein the thickness of the entrance window which is a Cherenkov radiator is a thickness capable of shielding the gamma rays so that the transmittance of the gamma rays is equal to or less than a specified value. 7. The gamma ray detector according to claim 1 , wherein the thickness of the entrance window which is a Cherenkov radiator is a thickness capable of shielding the gamma rays so that the transmittance of the gamma rays is equal to or less than a specified value.
Assignees
Inventors
Classifications
Scintillation-photodiode combinations · CPC title
- G01T1/22Primary
with Cerenkov detectors · CPC title
Gamma-ray resonance absorption, e.g. using the Mössbauer effect · CPC title
Measuring radiation intensity (G01T1/29 takes precedence {; self-powered detectors G01T3/006; using an ionisation chamber filled with a liquid or solid, e.g. frozen liquid, dielectric G01T3/008}) · CPC title
Silicon photomultipliers [SiPM], e.g. an avalanche photodiode [APD] array on a common Si substrate · CPC title
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- What does patent US10996348B2 cover?
- A gamma ray detector is a detector detecting gamma rays and includes a photomultiplier tube having an entrance window and a photoelectric surface. The entrance window is a Cherenkov radiator. The photoelectric surface is formed on a vacuum side of the entrance window via an intermediate layer. The thickness of the intermediate layer is equal to or less than the wavelength of Cherenkov light emi…
- Who is the assignee on this patent?
- Hamamatsu Photonics Kk
- What technology area does this patent fall under?
- Primary CPC classification G01T1/22. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 04 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).