Detector device for radiation monitoring

Abstract

The invention discloses a detector device for radiation monitoring. The device comprises an ionization chamber part, a circuit part and a metal seal box; the ionization chamber part comprises a shell and an electrode part; and the circuit part is used for processing electric signals from the electrode part and arranged in the metal seal box. Moreover, all of a ball-shaped gas-filled ionization chamber, a signal amplification / data processingcircuit, the metal seal box and the like are put in an insulating cover so that the adaptability of the whole detector device to serious environments is further improved. Moreover, a conductive film is plated on an outer layer of the insulating cover so that an electromagnetic shielding function is achieved, the electromagnetic interference resistance of the signal amplification / data processingcircuit is improved, the performance is stable and the measurement accuracy is improved.

Description

[0001] This application is a divisional application of the No. 200810101351.6 invention patent application entitled "Detector Equipment for Radiation Detection" submitted to the China Patent Office on March 5, 2008. technical field [0002] The invention relates to the technical field of environmental radiation monitoring, in particular to a detector device for radiation monitoring. technical background [0003] As a clean energy source, nuclear power also has its own disadvantages, that is, nuclear energy is radioactive. Therefore, it is very important to monitor the environmental radiation in a large area around the nuclear power plant, especially the development of gamma-ray detector equipment that directly reflects the local radioactivity level is extremely necessary. [0004] At present, there are few detectors for environmental gamma-ray monitoring at home and abroad. Environmental gamma spectrometers produced in my country (such as BH1324F of Beijing Nuclear Instrume...

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Problems solved by technology

[0010] However, due to the separation of the existing ionization chamber and the corresponding amplification / data acquisition circuit, the overall sealing of the detector is poor, and it is often unable to withstand various harsh weather conditions, especially in a mixed environment with long-term humidity or unknown air composition The capacitance between the electrodes of the ionization chamber tends to fluctuate, and the leakage current from the high-voltage electrode to the signal electrode through the insulating layer will also change, which will inevitably affect the signal output of the ionization chamber, thereby affecting the measurement accuracy.

[0011] In addition, the complex external electromagnetic field will also interfere with the weak current signal drawn from the signal pole of the ionization chamber to the amplifier circuit, resulting in increased noise

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