公开(公告)号：JPH09180671A

公开(公告)日：1997-07-11

申请号：JP33903095

申请日：1995-12-26

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMASHITA KAZUMI ,  ISHIZU TOMOHIRO ,  OMURA TAKAYUKI ,  UCHIYAMA ATSUSHI ,  MORITA TETSUYA

IPC: H01J43/10

Abstract: PROBLEM TO BE SOLVED: To provide a photoelectron multiplying tube using a long scale-shaped line focus type dynode of high electron collecting efficiency in the rear stage dynode. SOLUTION: A device is provided with a tubular vacuum vessel 10 and an electron multiplier part 30 received in this vacuum vessel 10 to have box and grid type dynodes 41 to 43 in a front stage also line focus type dynodes 44 to 50 in a rear stage. The line focus type dynode 44 to 50 has a bending groove 52 extended in a direction of a tube axis A of the vacuum vessel 10, the line focus type dynode 44 to 50 is folded along this bending groove 52.

公开(公告)号：JPH09161718A

公开(公告)日：1997-06-20

申请号：JP32474895

申请日：1995-12-13

Applicant: HAMAMATSU PHOTONICS KK

Inventor： UCHIYAMA ATSUSHI ,  YAMASHITA KAZUMI ,  NAKAMURA MAKOTO ,  MORITA AKIIE

IPC: H01J43/04 ,  H01J9/12 ,  H01J43/08

Abstract: PROBLEM TO BE SOLVED: To provide a photomultiplier excellent in cathode uniformity by supporting the end sections of deposition rods with linear expansion absorbing means, and absorbing the elongation by the linear expansion of the deposition rods generated at the time of excitation heating. SOLUTION: A pair of deposition rods 40 extended in the direction of the tube axis A are provided between a focus disk 31 and a photoelectric surface 20. Linear expansion absorbing means 41 supporting the end sections 40a of the deposition rods 40 and absorbing the elongation by the linear expansion generated when the deposition rods 40 are excitation-heated are provided on the outsides of the end sections 40 a of the deposition rods 40. When a voltage is applied between a pair of linear expansion absorbing means 41, the deposition rods 40 are heated, the evaporated Sb is deposited on the inner face 11a of a light entrance window 11, and the photoelectric surface 20 is formed. The deposition rods 40 are linearly expanded in the axial direction during this process, however the elongation is absorbed by the linear expansion absorbing means 41. The deposition rods 40 are prevented from being bent into a bow shape.

公开(公告)号：JPH09180670A

公开(公告)日：1997-07-11

申请号：JP33903295

申请日：1995-12-26

Applicant: HAMAMATSU PHOTONICS KK

Inventor： UCHIYAMA ATSUSHI ,  WADA KAZUAKI ,  YAMASHITA KAZUMI ,  ISHIZU TOMOHIRO ,  MORITA TETSUYA

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

Abstract: PROBLEM TO BE SOLVED: To provide a long scale-shaped photomultiplier tube of high delivery efficiency of an electron between stages of the final step dynode and anode. SOLUTION: A device comprises a tubular vacuum vessel 10 having a light incident window 11, photoelectric surface 20 formed in an internal surface of the light incident window 11 and an electron multiplier part 30 received in the vacuum vessel 10 to be extended in a direction of a tube axis A of the vacuum vessel 10. The electron multiplier part 30 is provided with a plurality of steps of dynodes 41 to 50 multiplying an electron emitted from the photoelectric surface 20 and an anode 34 arranged in the vicinity of the final step dynode 50 to collect the electron multiplied by this dynode 50, a main unit 34a of the anode 34 has a V-shaped section folded into two parts along the tube axis A, a folded part 34c of the anode 34 is arranged adjacent to a secondary electron emitting surface 50b of the dynode 50.

公开(公告)号：JPH01211851A

公开(公告)日：1989-08-25

申请号：JP3700188

申请日：1988-02-19

Applicant: FUJI PHOTO FILM CO LTD ,  HAMAMATSU PHOTONICS KK

Inventor： ARAKAWA SATORU ,  TAKAHASHI KENJI ,  KUSHIMA HIROYUKI ,  YAMASHITA KAZUMI

IPC: H01J43/04 ,  H01J43/20 ,  H01J43/24 ,  H01J43/28

Abstract: PURPOSE:To emit a large quantity of photoelectrons from photoelectric cathode by arranging the photoelectric cathode between a reflecting plate and a light receiving face and arranging the reflecting plate in the direction that the light passing the photoelectric cathode is reflected toward the photoelectric cathode. CONSTITUTION:A photoelectric cathode 17b is provided on the inner face of the main body 17A of a photoelectron multiplier tube to face a slender light receiving face 17a extended in the lengthy direction, a curved reflecting plate 17r is fitted to its inside. Since the reflecting plate 17r is arranged in the direction that the accelerated phosphorescence luminous light 15 passing the photoelectric cathode 17b is reflected toward the photoelectric cathode 17b, photoelectrons E are emitted when the accelerated phosphorescence luminous light 15 is thus reflected and radiates the photoelectric cathode 17b again. The accelerated phosphorescence luminous light 15 passes the photoelectric cathode 17b at least twice, thereby the generation efficiency of photoelectrons can be improved as compared with that when the light passes the photoelectric cathode only once.