公开(公告)号：US20240105434A1

公开(公告)日：2024-03-28

申请号：US17768961

申请日：2020-02-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Sho HIKOSAKA ,  Takahiro SHIBATA ,  Yuki NISHIMURA

IPC: H01J43/30 ,  H01J43/20

CPC classification number: H01J43/30 ,  H01J43/20

Abstract: The present embodiment relates to an electron multiplier or the like having a structure for realizing fast response characteristics as compared with the related art, and the electron multiplier includes at least a dynode unit, a stem, a coaxial cable, a conductive member, and a capacitor. The dynode unit includes multiple-stage dynodes, an anode, and a pair of insulating support members. An end portion of an outer conductor is drawn into the dynode unit together with an exposed portion of an inner conductor constituting a part of one end portion of the coaxial cable. With this configuration, it is possible to arrange the capacitor in a space between the dynode unit and the stem, and it is possible to fix the exposed portion of the inner conductor to a portion of the anode interposed between the pair of insulating support members.

公开(公告)号：US20210305033A1

公开(公告)日：2021-09-30

申请号：US17057926

申请日：2019-05-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuki NISHIMURA ,  Masahiro KOTANI ,  Takanori ICHINOMIYA

IPC: H01J43/20

Abstract: A first-stage dynode is a first-stage dynode to be used in a photomultiplier tube, and includes a bottom wall portion and a pair of side wall portions extending from both end portions of the bottom wall portion in a predetermined direction to one side. An electron emission surface is formed by a bottom surface of the bottom wall portion on the one side and a pair of side surfaces of the pair of side wall portions on the one side, and each of the pair of side surfaces is a curved surface that is curved in a concave shape in a cross section parallel to the predetermined direction.