Photomultiplier installation protection structure

Abstract

The invention discloses a photomultiplier installation protection structure. The structure has the following beneficial effects: a rubber clamp sleeve is sleeved on a tail tube of a photomultiplier, and a metal shell is added to the outside the rubber clamp sleeve to apply certain pre-tightening force to the rubber clamp sleeve, so that the photomultiplier can be tightly wrapped up and can not radially drift; a clamp slot is arranged in the rubber clamp sleeve and a ceramic substrate of the photomultiplier is clamped in the clamp slot, thus solving the problem of axial drifting of the photomultiplier; therefore, the photomultiplier is hard to damage due to vibration; besides, the whole photomultiplier is hermetically put in the metal shell, thus avoiding the possible impact of hard light irradiation on the photomultiplier; in terms of installation, a through slot is arranged at one side of the rubber clamp sleeve and a slot with middle parts connected is arranged at the opposite side of the rubber clamp sleeve, so that the two parts of the clamp sleeve are incompletely disconnected, when the photomultiplier is put in the clamp sleeve, the two parts of the clamp sleeve are disconnected along the through slot and the tail tube of the photomultiplier is put in the inner cavity of the clamp sleeve, and the operations are very convenient; and the structure is simple and packaging process is simple and convenient, effects are good.

Description

Technical field [0001] The invention relates to the field of detection devices of X imaging systems, in particular to a photomultiplier tube installation protection structure. Background technique [0002] The photomultiplier tube is a kind of vacuum device, which is composed of a photoemission cathode (photocathode) and a focusing electrode, an electron multiplier and an electron collector (anode). The typical photomultiplier tube can be divided into two types: the end window type and the side window type according to the receiving mode of the incident light pole. The efficiency of the end-window photomultiplier tube is relatively high. The main work process is as follows: [0003] When light hits the photocathode, the photocathode excites photoelectrons into the vacuum. These photoelectrons enter the multiplication system according to the focused electric field, and are multiplied and amplified through further secondary emission. The amplified electrons are collected by the e...

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