Unlock instant, AI-driven research and patent intelligence for your innovation.

Cadmium zinc telluride (CZT) area gamma detector

A gamma detector, cadmium zinc telluride technology, applied in the field of nuclear radiation monitoring, to achieve the effect of high detection efficiency

Active Publication Date: 2016-05-18
IMDETEK
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the regional gamma monitoring system is mainly used in the real-time monitoring of gamma-ray dose rate in key areas. Various types of detectors in the system realize the conversion of physical radiation and voltage and current signals, but the currently used regional gamma monitoring system cannot realize the Gamma-ray high-resolution energy spectrum measurement. At the same time, the cadmium zinc telluride (CZT) detector is the third-generation semiconductor detector. Compared with other types of detectors, it has the characteristics of high detection efficiency, room temperature work, and good angular responsivity. However, the cadmium zinc telluride CZT detector has not been applied to the regional gamma monitoring system to maximize the effect of the cadmium zinc telluride CZT detector

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cadmium zinc telluride (CZT) area gamma detector
  • Cadmium zinc telluride (CZT) area gamma detector
  • Cadmium zinc telluride (CZT) area gamma detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 , as shown, a cadmium zinc telluride CZT area gamma detector includes a cadmium zinc telluride CZT detection crystal, a charge sensitive amplifier circuit, an SK main amplifier amplifier circuit, a single-channel pulse amplitude analysis circuit, and a high voltage module circuit; the tellurium The zinc-cadmium CZT detection crystal is electrically connected in such figure 2 On the shown charge sensitive amplifier circuit, the high voltage module circuit is electrically connected to the charge sensitive amplifier circuit, the output end of the charge sensitive amplifier circuit is connected to the input end of the SK main amplifier circuit, and the SK main amplifier amplifier circuit is connected to the input terminal of the SK main amplifier circuit. The output end of the circuit is electrically connected with the input end of the single-channel pulse amplitude analysis circuit, and the output end of the single-channel pulse amplitude analysis circuit...

Embodiment 2

[0022] On the basis of Example 1, a cadmium zinc telluride CZT detection crystal is made of cadmium zinc telluride CZT material of 10x10x10mm, and when pressurized +800V, the sensitivity is 100~300cps / μSv / h; Zinc-cadmium CZT crystal in the energy spectrum test, the 241 Am rays can achieve an energy resolution of less than 10%;

[0023] The charge-sensitive amplifying circuit adopts FET amplifier chip opa2211 and JFET field effect tube to form a capacitive feedback amplifying circuit, and the subsequent stage circuit is a 2.5 times positive input amplifying circuit to amplify and drive the signal. The output signal amplitude of the charge sensitive amplifying circuit is linear to the ray energy. Its sensitivity can reach 150mV / MeV, and the electronic noise is less than 160 electrons;

[0024] The SK main amplifier amplifier circuit amplifies the exponentially decaying signal output by the charge sensitive amplifier circuit by 100-200 times, and converts the exponentially deca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a cadmium zinc telluride (CZT) area gamma detector, comprising a CZT detection crystal, a charge sensitive amplification circuit, an SK main amplification circuit, a single pulse amplitude analysis circuit and a high-voltage module circuit. The CZT detection crystal is in electric connection with the charge sensitive amplification circuit; the high-voltage module circuit is in electric connection with the charge sensitive amplification circuit; the output terminal of the charge sensitive amplification circuit is in connection with the input terminal of the SK main amplification circuit; the output terminal of the SK main amplification circuit is in electric connection with the input terminal of the single pulse amplitude analysis circuit; the output terminal of the single pulse amplitude analysis circuit outputs signal pulse. The CZT area gamma detector has the characteristics of high detection efficiency and sound search angle responsivity, and can work under room temperatures, and realize gamma ray high sensitivity and nondirectional discrimination measurement.

Description

technical field [0001] The invention relates to the field of nuclear radiation monitoring, in particular to a cadmium zinc telluride CZT area gamma detector. Background technique [0002] At present, the regional gamma monitoring system is mainly used in the real-time monitoring of gamma-ray dose rate in key areas. Various types of detectors in the system realize the conversion of physical radiation and voltage and current signals, but the currently used regional gamma monitoring system cannot realize the Gamma-ray high-resolution energy spectrum measurement. At the same time, the cadmium zinc telluride (CZT) detector is the third-generation semiconductor detector. Compared with other types of detectors, it has the characteristics of high detection efficiency, room temperature work, and good angular responsivity. But the cadmium zinc telluride CZT detector has not been applied to the regional gamma monitoring system to give full play to the maximum effect of the cadmium zinc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/208
CPCG01T1/208
Inventor 赵波刘海峰
Owner IMDETEK