公开(公告)号：US20220230860A1

公开(公告)日：2022-07-21

申请号：US17609519

申请日：2020-05-12

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Terunori KAWAI ,  Yoshitaka TORII ,  Masami SHIBAYAMA ,  Hiroyuki WATANABE ,  Shinichi YAMASHITA

IPC: H01J43/08 ,  H01J9/12 ,  H01J43/18

Abstract: A photocathode including a substrate, a photoelectric conversion layer provided on the substrate and generating photoelectrons in response to incidence of light, and an underlayer provided between the substrate and the photoelectric conversion layer and containing beryllium, in which the underlayer has a first underlayer containing a nitride of beryllium.

公开(公告)号：US20250037982A1

公开(公告)日：2025-01-30

申请号：US18779135

申请日：2024-07-22

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Shinichi YAMASHITA ,  Daichi Masuko ,  Satoshi Suzuki ,  Taisuke Nakaya ,  Kuniyoshi Mori ,  Rina Konno

IPC: H01J43/12

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.