Title:
ELECTRON TUBE
Document Type and Number:
WIPO Patent Application WO/2005/027178
Kind Code:
A1
Abstract:
An electron tube (1) in which one end of an insulating tube (9) projects toward the inside part of an enclosure (2), and an avalanche photodiode (APD) (15) is provided to the one end of the insulating tube (9). The other end of the insulating tube (9) is connected to an outer stem (6) of the enclosure (2). An alkali source (27) is disposed inside the enclosure (2) so as to produce alkaline metal vapor and to form a photoelectric surface (11) in a predetermined area of the inner wall of the enclosure (2). The alkali source (27) is separated from the insulating tube (9) by separating members (21’, 23’, 26). The alkaline metal vapor produced when the electron tube (1) is fabricated does not deposit on the insulating tube (9) because of the presence of the separating members (21’, 23’, 26). The withstanding voltage between the enclosure (2) and the APD (15) does not lower, and deterioration of the efficiency of entrance of electrons into the APD (15) because of the adverse effect on the electric field inside the electron tube (1) in prevented.
Inventors:
SUYAMA MOTOHIRO (JP)
KYUSHIMA HIROYUKI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
EGAWA YASUYUKI (JP)
UCHIYAMA ATSUSHI (JP)
KIMURA SUENORI (JP)
KYUSHIMA HIROYUKI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
EGAWA YASUYUKI (JP)
UCHIYAMA ATSUSHI (JP)
KIMURA SUENORI (JP)
Application Number:
PCT/JP2004/013130
Publication Date:
March 24, 2005
Filing Date:
September 09, 2004
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK (JP)
SUYAMA MOTOHIRO (JP)
KYUSHIMA HIROYUKI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
EGAWA YASUYUKI (JP)
UCHIYAMA ATSUSHI (JP)
KIMURA SUENORI (JP)
SUYAMA MOTOHIRO (JP)
KYUSHIMA HIROYUKI (JP)
NEGI YASUHARU (JP)
FUKASAWA ATSUHITO (JP)
KAWAI YOSHIHIKO (JP)
EGAWA YASUYUKI (JP)
UCHIYAMA ATSUSHI (JP)
KIMURA SUENORI (JP)
International Classes:
H01J9/233; H01J40/04; H01J40/14; H01J40/16; (IPC1-7): H01J40/04; H01J40/14; H01J9/233
Foreign References:
| JPH09297055A | 1997-11-18 | |||
| JPS4619162Y1 | 1971-07-03 | |||
| JPH08148113A | 1996-06-07 | |||
| JPH09312145A | 1997-12-02 | |||
| JPH09297055A | 1997-11-18 | |||
| US4315184A | 1982-02-09 | |||
| EP0805478A2 | 1997-11-05 | |||
| US3658713A | 1972-04-25 |
Other References:
See also references of EP 1670031A4
Attorney, Agent or Firm:
Koizumi, Shin (37-4 Yushima 3-chome, Bunkyo-k, Tokyo 34, JP)
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