PURPOSE: To facilitate degassing within each channel of the titled device by exhausting gas molecules or the like stuck on a microchannel plate by actuating an exhauster and each part before using when the plate is exposed to gas.
CONSTITUTION: When detecting parts 4AW4D are adjusted outside a vacuum chamber, a vacuum pump 9 is actuated after these parts are arranged at the specified position of the vacuum. Then, when the degree of vacuum of the vacuum chamber attains to a specified value, the voltage lower than the ordi nary service voltage is impressed to the microchannel plates of the detecting parts 4AW4D. Then, a low pressure mercury lamp 8 is lighted and the microchannel plate of each detecting part is irradiated by light. As a result, the gas absorbed to the inside of the microchannel plate is disorbed fully.
YAMASHITA TAKASHI
KANEKO SATORU
NAGATA HIROSHI
URAKAWA FUMIAKI
NIPPON KOGAKU KK
HAMAMATSU PHOTONICS KK