Near-pasting type micro-channel plate type photomultiplier with large opening area ratio

Abstract

The invention provides a near-pasting type micro-channel plate type photomultiplier with a large opening area ratio. The near-pasting type micro-channel plate type photomultiplier comprises an input light window, a photoelectric cathode, a square tube shell, a micro-channel plate and a position-sensitive anode. The photoelectric cathode is located on the inner surface of the input light window, and the micro-channel plate is located between the photoelectric cathode and the position-sensitive anode; the square tube shell comprises a first ceramic ring, an input electrode, a second ceramic ring, a getter electrode, a third ceramic ring and an indium sealing layer which are sequentially stacked, and the square tube shell is connected with the input light window in a sealed mode through a sealing layer. The position-sensitive anode comprises a ceramic framework, an output electrode and anodes, the anodes are distributed in the ceramic framework in a matrix array, and the anodes are not communicated with one another and are independent of one another; each anode is of a conical structure, an electronic receiving end is a square surface, an output end is gradually transited from a conical shape to a cylindrical anode rod, and the micro-channel plate adopts a two-part type vertical superposition structure, so that the apertures of the two micro-channel plates are <-shaped, one end ofthe micro-channel plate is positioned and powered by an input electrode, and the other end of the micro-channel plate is positioned by an output electrode.

Description

technical field [0001] The invention relates to the technical field of micro-channel plates, in particular to a close-fitting micro-channel plate photomultiplier tube with a large opening area ratio. Background technique [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 the splicing is completed, the proportion of the dead zone is too large, which affects the effective detection area. [000...

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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