Hamamatsu-photonics K.k.

Hamamatsu Photonics Kabushiki Kaisha

Chiyoshi Okuyama

Takeo Sugawara

Kimitsugu Nakamura

Yoshihiko Mizushima

Toshiyuki Uchiyama

Junichi Takeuchi

Masayoshi Sahara

Atushi Ishikawa

Support electrodes are provided for individually supporting a plurality of dynodes arranged inside of a vessel of an electron tube, such as photomultiplier tube. A black spacer formed from a ceramic material is disposed between the support electrodes. The black spacers are formed with elemental composition having content of MnO suppressed to 3 wt % or less. Current leaks, which are the cause of dark current, and abnormal generations of light during photomultiplication can be reduced, thereby improving the signal-to-noise ratio of the electron tube.

Electron tubes using insulation material containing little alkali metal

Disclosed are the processes of how to fabricate the microchannel plate for use in electron image intensifying by using a number of glass pipes, each consisting of glass material containing oxides of alkaline earth metals, i.e., magnesium oxide (MgO) or a mixture of magnesium oxide (MgO) and calcium oxide (CaO).

Process of how to fabricate the microchannel plate

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Hamamatsu, Japan

Chiyoshi Okuyama