Cryogenic thermometer based on scintillation crystal and its temperature calibration and measurement method

Abstract

The invention, which belongs to the field of radiation detection technology, in particular relates to a low-temperature thermometer based on a scintillation crystal and temperature calibration and measurement methods thereof. The low-temperature thermometer is composed of a temperature measurement module, a power module, a signal collection and calculation module, and a data acquisition and display module. The temperature measurement module includes a lens hood, a photoelectric device and signal amplification module, a scintillation crystal, a radioactive Isotope source, a metal plate, a scintillation crystal, and a photoelectric device and signal amplification module, wherein the photoelectric device and signal amplification module, the scintillation crystal, the radioactive Isotope source, the metal plate, the scintillation crystal, and the photoelectric device and signal amplification module are arranged successively in the lens hood from bottom to top in a coaxial coupling manner.The power module is connected with the two photoelectric device and signal amplification modules respectively. The input terminal of the signal collection and calculation module is connected with theoutput terminal of the two photoelectric device and signal amplification modules respectively; and the output terminal of the signal collection and calculation module is connected with the data acquisition and display module. A novel solution is provided for temperature detection in the extremely-low-temperature environment in the universe.

Description

technical field [0001] The invention belongs to the technical field of radiation detection, in particular to a low temperature thermometer based on scintillation crystals. Background technique [0002] Temperature is one of the most basic physical dimensions. It is an important attribute to evaluate substances and the environment. It is also an indispensable existence in production and life. Therefore, effective monitoring of temperature is extremely necessary. As a device capable of monitoring temperature, thermometers are widely used in production, life and scientific research. In recent years, with the continuous advancement of people's exploration of the universe, thermometers that can detect the extreme environment of the universe, especially the extremely low temperature environment, are needed. [0003] For the temperature detection of the extreme environment of the universe, the robustness of working for a long time in an extremely low temperature and strong radiati...

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Problems solved by technology

[0004] Commonly used thermometers can be divided into gas thermometers, resistance thermometers, infrared thermometers, thermocouple thermometers, high temperature thermometers, pointer thermometers, glass tube thermometers, etc. Under the environment, it often cannot work well, and at the same time, the extreme radiation environment in the universe is easy to affect its working state

This is related to the principle of their temperature measurement: a thermometer based on the principle of thermal expansion and contraction of solids, liquids, and gases affected by temperature, after the medium is liquefied or solidified at extremely low temperatures, the volume change decreases, and the Sensitivity; thermometers based on the principle of pyroelectric effect have high requirements on the circuit connection between components, which limits its use in complex environments and thermal radiation is difficult to detect when the temperature is extremely low; therefore For temperature detection in extremely cold environments in the universe, new solutions are needed

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