Patent ID: 6852979
Filing Date: 2005-02-08
Classification: H01J

Abstract:
1. A photomultiplier tube comprising: a faceplate for receiving light incident thereon; a photocathode for emitting electrons in response to the light incident on the faceplate; a hermetically sealed vessel; an electron multiplier provided in the hermetically sealed vessel for multiplying electrons emitted from the photocathode; and an anode for generating an output signal based on electrons multiplied by the electron multiplier, wherein the hermetically sealed vessel includes: a stem plate having an outer surface and, the stem plate being formed with stem pins for fixing the electron multiplier and the anode thereon; a metal side tube enclosing the electron multiplier and the anode, the metal side tube having two open ends, one of the open ends being sealed to the stem plate; and the faceplate sealed to the other open end of the side tube, the faceplate being made from glass, and wherein a plurality of screw means is provided at the outer surface of the stem plate.