Proximity Type Large Aperture Ratio Microchannel Plate Type Photomultiplier Tube

Abstract

The invention provides a close-fitting large opening area ratio microchannel plate photomultiplier tube, which comprises an input light window, a photocathode, a square tube shell, a microchannel plate and a position-sensitive anode. The photocathode is located on the inner surface of the input light window, and the microchannel plate is located between the photocathode and the position-sensitive anode; the square tube shell includes a first ceramic ring, an input electrode, a second ceramic ring, a getter electrode, a third The ceramic ring and the indium sealing layer, the square tube shell is sealed with the input light window through the sealing layer; the position-sensitive anode includes a ceramic skeleton, an output electrode and an anode, and a plurality of anodes are distributed in the ceramic skeleton in a matrix array, and the anodes are mutually Disconnected and independent of each other; each anode has a conical structure, the electron receiving end is a square surface, and the output end gradually transitions from a conical to a cylindrical anode rod. The aperture of the microchannel plate is in the shape of "く", one end is positioned and powered by the input electrode, and the other end is positioned by the output electrode.

Description

technical field [0001] The invention relates to the technical field of microchannel plates, in particular to a close-fitting large opening area ratio microchannel plate type photomultiplier tube. Background technique [0002] With the development of science and technology, high-energy physics, high-end nuclear medical instruments and other fields have put forward higher and higher requirements for photomultiplier tubes. The position resolution capability of photomultiplier tubes needs to reach the sub-millimeter level, and the signal response and time resolution need to reach picometers. It is on the order of seconds, and a single photomultiplier tube cannot be used alone due to its limited size. Many photomultiplier tubes are required to face the detection area and spliced ​​into a detection surface array. Therefore, extremely high requirements are also placed on the outer dimensions of the photomultiplier tubes, such as unreasonable outer dimension design. , on the one han...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, high-energy physics, high-end nuclear medical instruments and other fields put forward higher and higher requirements for photomultiplier tubes. Second order, and a single photomultiplier tube cannot be used alone due to its limited size. Many photomultiplier tubes need to be spliced ​​into a detection area array facing the detection area. Therefore, extremely high requirements are placed on the dimensions of the photomultiplier tubes. For example, the design of the dimensions is unreasonable. , on the one hand, it is not suitable for large-area splicing, on the other hand, after splicing is completed, the proportion of dead zone area is too large, which affects the effective detection area

[0003] Due to the low position resolution and large dead zone of traditional photomultiplier tubes, it is increasingly unable to meet the application requirements in many fields

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