Title:
電子管及び光電子増倍管
Document Type and Number:
Japanese Patent JP4231123
Kind Code:
B2
Abstract:
To prevent the deterioration in sensitivity of the photocathode (20) of an electron tube and maintain stable output for a long time, an ion confining electrode (22) and an ion trap electrode (23) are provided between the photocathode (20) and a first stage dynode (24a). The potential of the ion confining electrode (22) is set higher than that of the first stage dynode (24a), while the potential of the ion trap electrode (23) is set equal to or higher than that of the photocathode (20) and lower than that of the first stage dynode 24a. Since the feedback to the photocathode (20) of the positive ions generated in the vicinity of the first stage dynode can be effectively suppressed, the sensitivity of the photocathode (20) is prevented from decreasing, and stable output is maintained for a long time.
Inventors:
Hideki Shimoi
Hiroyuki Hisashima
Hiroshi Hasegawa
Nagai Toshimitsu
Hiroyuki Hisashima
Hiroshi Hasegawa
Nagai Toshimitsu
Application Number:
JP16701998A
Publication Date:
February 25, 2009
Filing Date:
June 15, 1998
Export Citation:
Assignee:
Hamamatsu Photonics Co., Ltd.
International Classes:
H01J43/06; H01J43/30
Domestic Patent References:
| JP4876470A | ||||
| JP10144251A | ||||
| JP9288992A | ||||
| JP2291658A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Tatsuya Shioda
Shiro Terasaki
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