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Dose rate survey meter based on dual hemisphere tellurium zinc cadmium detector and dual preamplifier

A preamplifier and dose rate meter technology, applied in the field of radiation monitoring, can solve the problems of low detection efficiency and energy resolution

Active Publication Date: 2017-03-15
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

In 2014, Wang Ying et al published the document "Research on the Applicability of Multifunctional Dose Rate Meter Based on Hemispherical CdZnTe Detector", and expounded the information based on the energy range, energy resolution, environmental adaptability and angular response. The applicability of the hemispherical CZT detector as a multifunctional dose rate meter, this document uses the common anode of two hemispherical CZT detectors to merge into a spherical CZT detector, but the detector disclosed in this document still has detection efficiency and Problems with low energy resolution

Method used

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  • Dose rate survey meter based on dual hemisphere tellurium zinc cadmium detector and dual preamplifier
  • Dose rate survey meter based on dual hemisphere tellurium zinc cadmium detector and dual preamplifier

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Embodiment

[0025] A dose rate meter based on dual hemispheric CdZnTe detectors and dual preamplifiers, the dose rate meter includes a detector system, a signal processing system and a control circuit system;

[0026] Described detector system comprises two hemispherical CZT crystals 2, preamplifier and circuit board, and the shape, structure and size of two hemispherical CZT crystals are exactly the same, are the cuboid shape of 10mm * 10mm * 5mm; The surface with the largest area of ​​a hemispherical CZT crystal is connected to the positive high voltage as the anode, and the other 5 surfaces are grounded as the cathode; the two crystals are installed on the circuit board in a left-to-right manner, and each CZT crystal is provided below the circuit board. A preamplifier, the signals generated by X and γ-rays on the CZT crystal are transmitted to the preamplifier; the cathode surfaces with the largest area of ​​the two crystals are the left and right adjacent surfaces, and the two adjacent...

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Abstract

The invention belongs to the radiation monitoring technology field and discloses a dose rate survey meter based on dual hemisphere tellurium zinc cadmium detector and dual preamplifier. The dose rate survey meter includes a detector system, a signal processing system and a control circuit system. The detector system comprises two hemispherical CZT crystals, a preamplifier and a circuit board. The control circuit system comprises a high voltage power supply module, a low voltage power supply module, a portable module power supply and a battery management chip. The signal processing system comprises a plurality of digital channels with two channels, a signal processing software, a liquid crystal touch screen and a computer. The dose rate survey meter can achieve high resolution and high detection efficiency.

Description

technical field [0001] The invention belongs to the technical field of radiation monitoring, in particular to a dose rate meter based on a double hemisphere CdZnTe detector and a double preamplifier. Background technique [0002] At home and abroad, the technology of using cadmium zinc telluride (hereinafter referred to as CZT) crystals for radiation monitoring is relatively mature. At present, planar, mixed hand-held, Frisch grid and hemispherical CZT detectors have been disclosed, among which hemispherical CZT detectors are generally cuboid in shape, and the electric field is hemispherical, so those skilled in the art generally call them hemispherical CZT detectors. In 2014, Wang Ying et al published the document "Research on the Applicability of Multifunctional Dose Rate Meter Based on Hemispherical CdZnTe Detector", and expounded the information based on the energy range, energy resolution, environmental adaptability and angular response. The applicability of the hemisp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/02
CPCG01T1/026Y02P70/50
Inventor 王莹陈凌骆志平黄金峰熊文俊庞洪超刘阳
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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