Photomultiplier tube including a protective layer
US12387924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2024 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Jul 22, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J43/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a photomultiplier tube including: a container including a window portion formed of a light-transmitting material, and a tubular portion that is connected to the window portion and defines a vacuum space in combination with the window portion; a photoelectric surface that is formed of a photoelectron-emitting material consisting of sodium, potassium, and antimony, is provided on a first surface of the window portion on a side of the vacuum space, and emits photoelectrons in correspondence with incident light; and an electron multiplier that emits secondary electrons in correspondence with incidence of the photoelectrons emitted from the photoelectric surface, and multiplies the secondary electrons. An aluminum oxide layer is formed between the photoelectric surface and the window portion and on a surface of the tubular portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.