An Environmental Radiation Dose Detector

Abstract

The invention relates to an environmental radiation dose detector. The environmental radiation dose detector comprises a DC / DC converter module; the input end of the DC / DC converter module is connected with an external power source; the output ends of the DC / DC converter module are connected with the input end of a high-voltage power source module and the input end of a preamplifying unit respectively; the output end of the high-voltage power source module is connected with the input end of a radiation sensor; the output end of the radiation sensor is connected with the input end of the preamplifying unit; the output end of the preamplifying unit is connected with a shielded cable; the radiation sensor is a high-pressure spherical ionization chamber; the high-pressure spherical ionization chamber comprisess an outer spherical crown; the outer spherical crown is provided with a detector interface and an air inflation and exhaust pipe; at least three inner spherical crowns are arranged in the outer spherical crown, wherein one of the inner spherical crowns is connected with an electric conduction electrode in the detector interface through an electric conductive tube, and the other inner spherical crowns are connected with the inner spherical crown connected with the detector interface through electric conductive tubes; and the electric conduction electrode is surrounded by two ceramic triaxial sealing heads. The environmental radiation dose detector of the invention has the advantages of small size, high sensitivity, good energy response and high suitability for industrial field.

Description

technical field [0001] The invention relates to the field of radiation protection, in particular to a detector applied to the measurement of the radiation dose rate of environmental level rays. Background technique [0002] An important aspect of environmental monitoring in the environmental radiation dose rate monitoring room is to obtain the radiation intensity of radioactive substances in the environment through real-time monitoring of the radiation dose of atmospheric environmental rays, and monitor the radiation safety of the environment to provide a reliable basis for ensuring personal safety. [0003] Especially in special industries, such as hospital CT room, using nuclear scales, electronic belt scales, nuclear level gauges, nuclear online coal ash analyzers and other environments with nuclear radioactive elements, the safety of nearby personnel must be guaranteed, and the work must be monitored in real time The radiation dose in the environment, if the radiation do...

AI Technical Summary

Problems solved by technology

[0003] Especially in special industries, such as hospital CT room, using nuclear scales, electronic belt scales, nuclear level gauges, nuclear online coal ash analyzers and other environments with nuclear radioactive elements, the safety of nearby personnel must be guaranteed, and the work must be monitored in real time The radiation dose in the environment, if the radiation dose is too large, it will cause great harm to the people nearby

[0004] Traditional environmental radiation dose rate detectors mainly use ray detectors in the form of GM tubes and ray detectors in the form of NaI crystals to monitor the rays in the environment in real time, but the above two detectors have the following disadvantages: ray detectors in the form of GM tubes The detection efficiency is low, and it is generally only used in the case of high dose rate; the radiation detector in the form of NaI crystal adopts a photomultiplier tube structure, although its detection efficiency is high, but it is afraid of falling, so it is only suitable for laboratories with low vibration In some occasions, it is not suitable for industrial sites with high vibration

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