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PMT gain control system using reference radiation

A radiation source and photomultiplier tube technology, which is applied in radiation measurement, nuclear radiation exploration, X/γ/cosmic radiation measurement, etc., can solve the problems of photomultiplier tube output signal gain stability fluctuation, power supply instability, etc.

Inactive Publication Date: 2014-08-20
思姆菲舍尔科技公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, due to effects such as temperature, aging rate of PMT or scintillator, instability of power supply, material of photocathode, etc., the gain stability of the output signal of photomultiplier tube may fluctuate

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  • PMT gain control system using reference radiation
  • PMT gain control system using reference radiation
  • PMT gain control system using reference radiation

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described with reference to the accompanying drawings. In the following detailed description of the embodiments, various specific details are set forth in order to provide a more nuanced understanding of the present disclosure. It will be apparent, however, to one of ordinary skill in the art that this disclosure may be practiced without these specific details. In other instances, well-known features have not been described in detail - so as not to obscure the present disclosure.

[0024] Typically, when a certain amount of energy is accumulated in the scintillator of a scintillation counter, the scintillator generates light, and a photomultiplier tube connected to the scintillator converts the light into an electrical signal through the photoelectric effect and secondary emission. Then the electrical signal is output at the anode of the photomultiplier tube as a pulse with a certain height (amplitude). The convers...

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Abstract

A method for the gain of the scintillation detector includes using a reference radiation source and a photomultiplier tube, and controlling the gain of the scintillation detector based on the reference radiation source. The controlling includes: detecting a change in gain of the scintillation detector; determining an amount of change in gain; outputting a control signal to compensate for the change in gain; and stabilizing the gain relative to a reference radiation source based on the control signal. A gain control system for controlling a flicker detector includes computer readable instructions stored in a memory for causing a processor to: detect a change in gain of the flicker detector; determine an amount of change in gain; output a control signal to compensate for the change in gain. an amount of change in the gain; and based on the control signal, stabilizing the gain relative to a reference radiation source.

Description

technical field [0001] The present invention relates generally to a photomultiplier tube and, more particularly, to a process for controlling the gain of a photomultiplier tube (PMT). Background technique [0002] A photomultiplier tube (PMT) is a sensitive detection device that measures light or converts light into an amplified electrical signal. A typical photomultiplier tube consists of an evacuated glass tube and a series of electrodes disposed within the tube. The series of electrodes includes: a photocathode (from which the light source is injected into the tube), a focusing electrode, a plurality of secondary emission electrodes (acting as electron multipliers), and an anode (where the multiplied charges are collected) . [0003] When incident photons (incident light) strike the photocathode of the photomultiplier tube, due to the photoelectric effect, the photons excite photoelectrons. Photoelectrons emitted from the photocathode are accelerated by an electric fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V5/00G01V5/04H01J43/30
CPCG01T1/40G01T1/2006G01T1/2008H01J43/30
Inventor 亚历克斯·库利克亚历山大·约瑟夫·叶辛尼古拉·巴图林
Owner 思姆菲舍尔科技公司