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Method and system for quickly switching photomultiplier of low-light detector

A photomultiplier tube, fast switching technology, applied in electronic switches, electrical components, pulse technology and other directions, can solve problems such as photomultiplier tube fast switching

Pending Publication Date: 2020-10-20
OVATION HEALTH SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The technical solution of the present invention provides a method and system for quickly switching the photomultiplier tube of the low-light detector to solve the problem of how to quickly switch the photomultiplier tube of the low-light detector

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  • Method and system for quickly switching photomultiplier of low-light detector
  • Method and system for quickly switching photomultiplier of low-light detector
  • Method and system for quickly switching photomultiplier of low-light detector

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Embodiment Construction

[0043] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely. Invention and fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the drawings do not limit the present invention. In the drawings, the same units / elements use the same reference signs.

[0044] Unless otherwise specified, the terms (including scientific and technological terms) used herein have the usual meanings to those skilled in the art. In addition, it is understandable that the terms defined in commonly used dictionaries should be understood as having consistent meanings in the context of their related fields, and should not be understood as idealized or overly for...

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Abstract

The invention discloses a method and a system for quickly switching a photomultiplier of a low-light detector. The method comprises the following steps: a gating circuit is added to a voltage divisioncircuit of the low-light detector; when the laser is turned off, a pulse low-level signal is input into the input end of the gating circuit, a potential difference is formed among the first multiplication stage, the second multiplication stage and the third multiplication stage of the voltage division circuit through the high-voltage power supply of the low-light detector, and the photomultiplierPMT is turned on; when the laser is turned on, a pulse high-level signal is input into the input end of the gating circuit, power supply of a high-voltage power supply of the low-light detector is cut off, the potential difference among the first multiplication stage, the second multiplication stage and the third multiplication stage of the voltage division circuit is zero, and the photomultiplier PMT is turned off.

Description

Technical field [0001] The present invention relates to the technical field of low-light detection, and more specifically, to a method and system for quickly switching on a photomultiplier tube of a low-light detector. Background technique [0002] In the laser spectroscopy test, fluorescence test, Raman spectroscopy, biological DL test, Boltzmann electronic temperature test and other tests, the signal as the test object is very weak, so high-sensitivity photomultiplier tubes are usually used as detection means. However, the intensity of the light used as the excitation source is often very strong, which can easily lead to saturation of the output current of the photomultiplier tube anode, and even irreversible damage. This requires the photomultiplier tube to be turned off when the excitation light is acting to avoid damage; when the signal light needs to be detected, the photomultiplier tube should be turned on for detection. [0003] The peripheral circuit of the photomultiplie...

Claims

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Application Information

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IPC IPC(8): H03K17/042
CPCH03K17/042
Inventor 王晶杨永东张晓春
Owner OVATION HEALTH SCI & TECH CO LTD
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