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Micro-channel plate type photomultiplier tube with high quantum efficiency and preparation method thereof, and dual-alkali photocathode and preparation method thereof

A technology of photomultiplier tube and photocathode, applied in the field of photoelectric detection, can solve the problems of poor repeatability of photocathode, and achieve the effect of high quantum efficiency and strong consistency

Active Publication Date: 2018-01-23
NORTH NIGHT VISION TECH +1
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  • Claims
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Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a microchannel plate-type photomultiplier tube with high quantum efficiency, a double-alkali photocathode and a preparation method for solving the poor repeatability of the existing photocathode question

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  • Micro-channel plate type photomultiplier tube with high quantum efficiency and preparation method thereof, and dual-alkali photocathode and preparation method thereof
  • Micro-channel plate type photomultiplier tube with high quantum efficiency and preparation method thereof, and dual-alkali photocathode and preparation method thereof
  • Micro-channel plate type photomultiplier tube with high quantum efficiency and preparation method thereof, and dual-alkali photocathode and preparation method thereof

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] A kind of microchannel plate type photomultiplier tube, its basic composition is:

[0051] A light-transmitting glass vacuum container, the inside of which is in a vacuum state, and the double alkali photocathode is covered on the inner surface of the upper hemisphere of the glass vacuum container;

[0052] A reflective film placed on the inner surface of the lower hemisphere of the glass vacuum container;

[0053] A focusing electrode placed at a lower position in the center of the glass vacuum vessel and used to collect electrons generated by the double alkali photocathode;

[0054] A microchannel plate type electron multiplier placed at the rear end of the focusing electrode to generate multiplied electrons;

[0055] Placed at the end of the glass vacuum vessel, used to supply power to the bialkali photocathode, focusing electrode and microchannel plate ele...

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Abstract

The invention discloses a micro-channel plate type photomultiplier tube with high quantum efficiency and a preparation method thereof, and a dual-alkali photocathode and a preparation method thereof.Obtained dual-alkali photocathodes are sequentially stacked on the substrate in a multi-layer alkali antimonide manner; and the components of the alkali antimonide change based on a rule that antimonyelements decrease gradually and alkali metal increases gradually in a direction from the substrate of the dual-alkali photocathode to the outer surface. Therefore, the obtained stable dual-alkali photocathode structure has high repeatability; and a self-built electric field is formed inside the dual-alkali photocathode, so that electrons are excited in vacuum and thus the obtained micro-channel plate type photomultiplier tube has the high quantum efficiency.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to a photomultiplier tube. Background technique [0002] The photomultiplier tube is a vacuum electronic device that converts weak light signals into electrical signals and multiplies and amplifies the electrical signals. It can effectively detect extremely weak light and can be widely used in extremely weak light detection, photon detection, chemiluminescence, Bioluminescence and other research fields have the characteristics of high detection efficiency and high time resolution. As a vacuum device, the photomultiplier tube mainly includes photocathode, focusing electrode, electron multiplier and other components. The core part of the photomultiplier tube is the photocathode, and its performance directly affects the performance of the entire photomultiplier tube. The higher the efficiency, the higher the detection efficiency of the photomultiplier tube and the better the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/34H01J40/16H01J43/08H01J9/12C23C14/24C23C14/14
Inventor 金睦淳司曙光张勤东侯巍谢飞钱森刘术林曹宜起丛晓庆邱祥彪
Owner NORTH NIGHT VISION TECH
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