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Gating focus type photomultiplier tube

A technology of photomultiplier tube and gating electrode, which is applied in the direction of electron multiplier tube, electron multiplier details, discharge tube, etc., can solve the problem of limited effective detection area and achieve the effect of improving the detection area

Pending Publication Date: 2018-07-06
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to provide a gating focus type photomultiplier tube, which solves the technical problem that the effective detection area of ​​existing photodetector devices is limited

Method used

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Embodiment Construction

[0026] The present invention is a gating focus type photomultiplier tube, the structure of its preferred embodiment includes a vacuum container, an input window is arranged at one end of the vacuum container, a cathode is arranged on the inner surface of the input window, and an anode is arranged at the other end of the vacuum container; A gate electrode, a focus electrode and an electron multiplier are sequentially arranged between the anodes.

[0027] The vacuum container is made of glass, ceramics and metal materials, wherein the glass material serves as an optical input window, and the ceramic material and metal material together form the wall of the vacuum container. The cathode is used to receive photons and convert them into electrons. The electron multiplier is used to receive the photoelectrons emitted from the cathode and generate multiplied electrons. The focusing electrode is used to focus the photoelectrons so that they fall on the effective area of ​​the electron ...

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Abstract

The invention belongs to the technical field of photoelectric detection devices, and particularly relates to a gating focus type photomultiplier tube. The structure of the gating focus type photomultiplier tube comprises a vacuum container, one end of the vacuum container is provided with an input window, the inner surface of the input window is provided with a negative pole, and the other end ofthe vacuum container is provided with a positive pole; a gate electrode, a focusing electrode and an electron multiplier are arranged between the negative electrode and the positive electrode in turn.The gating focus type photomultiplier tube solves the technical problem that the effective detection area of an existing photoelectric detection device is limited. The gating focus type photomultiplier tube is a photomultiplier tube not only provided with a gating function and but also provided with an electronic focusing function. The gating focus type photomultiplier tube has the advantages that the magnifying power focusing function enables the electrons emitted by a large-area photocathode to be sent onto the electron collecting surface of a small-sized electron multiplier, thereby increasing the detection area of the photomultiplier tube.

Description

technical field [0001] The invention belongs to the technical field of photodetection devices, and in particular relates to a gate-focusing photomultiplier tube. Background technique [0002] Photomultiplier tube (PMT for short) is an electric vacuum photodetection device, its main function is to convert weak optical signals into electrical signals, and amplify and output the electrical signals. 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, scientific research, and military affairs. [0003] One of the main application fields of photomultiplier tubes is laser radar. At present, airborne laser ranging radar, shipborne underwater detection laser radar and high-altitude atmospheric detection laser radar all use photomultiplier tubes as the core detection devices. Because the laser rada...

Claims

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Application Information

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IPC IPC(8): H01J43/06H01J43/28
CPCH01J43/06H01J43/28
Inventor 刘虎林韦永林赛小锋温文龙裴成权田进寿卢裕王俊锋徐向晏
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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