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Self-adaptive large-dynamic-range photomultiplier

A large dynamic range, photomultiplier tube technology, applied in electron multiplier dynodes, electron multiplier details, multiplier electrodes, etc., can solve the problems of restricting the dynamic range of the photomultiplier tube, the total number of electrons is too large, etc., to ensure linearity The effect of multiplying, reducing parameter deviation, and expanding dynamic range

Active Publication Date: 2019-10-25
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0011] In order to solve the problem that the current general-purpose photomultiplier tube restricts the dynamic range of the photomultiplier tube due to the electron multiplication and the total number of electrons in the transmission process is too large, the invention provides an adaptive large dynamic range photomultiplier tube

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Embodiment Construction

[0053] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 , figure 2 As shown, the adaptive large dynamic range photomultiplier tube provided by the present invention includes a vacuum vessel 1, a fast-response photodetector and a modulation voltage generation module arranged outside the vacuum vessel 1, and an optical input window 2 arranged on the vacuum vessel 1 , and a cylindrical focusing electrode 3, a drift electrode 4, a modulation electrode 5, an electron multiplication system 6, and an anode 7 arranged sequentially in the vacuum vessel 1; an anode output electrode 8 and a focusing power supply electrode 10 are also arranged in the vacuum vessel 1 , a drift electrode power supply electrode 11, a modulation electrode power supply electrode 12, an electron multiplication system input power supply electrode 13 and an output power supply electrode 14, and support columns for supporting these e...

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Abstract

The invention provides a self-adaptive large-dynamic-range photomultiplier in order to solve the problem that the dynamic range of an existing universal photomultiplier is limited due to the fact thatthe total number of electrons is too large in the electron multiplication and transmission process. According to the invention, a drift electrode and a modulation electrode are arranged between a photocathode and an electron multiplication system, and the space between the photocathode and the electron multiplication system is divided into three parts: an electron drift region, an electron modulation region and an electron acceleration region; the electron drift region controls the electron transit time of electrons so as to ensure that the modulation voltage generation module can generate stable output; the electron modulation region realizes screening of the number of electrons, and linearly controls the number of the electrons entering the electron multiplication system, so that the electron multiplication system is in a linear output working state, and the dynamic range of the photomultiplier to the detection light intensity is expanded.

Description

technical field [0001] The invention relates to a photoelectric detection device, in particular to a photomultiplier tube which automatically adjusts the electron multiplication characteristic according to the change of the detected light intensity to realize the detection of a large dynamic range. Background technique [0002] A photomultiplier tube (PMT for short) is an electric vacuum photodetection device, which is mainly composed of a photocathode, an electron multiplier and an anode. The main function of the photomultiplier tube is to convert the weak optical signal emitted by the detection target into a space electron beam signal, and amplify and output the electron beam signal, so as to realize the function of target detection. Photomultiplier tubes have the characteristics of wide detection spectral range, large dynamic range, high electronic gain, low dark noise, and fast response speed, and are widely used in various fields such as medical treatment, detection, an...

Claims

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Application Information

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IPC IPC(8): H01J43/04H01J43/06H01J43/10
CPCH01J43/04H01J43/06H01J43/10
Inventor 刘虎林辛丽伟徐向晏田进寿赛小锋吕沛韩彪何建平王俊锋韦永林卢裕温文龙王兴陈萍何凯高贵龙
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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