Standard high-pressure ionization chamber and manufacturing method thereof

Abstract

The invention provides a standard high-pressure ionization chamber and a manufacturing method of the standard high-pressure ionization chamber. The standard high-pressure ionization chamber comprises a high-pressure ionization chamber probe. The high-pressure ionization chamber probe comprises a stainless steel outer shell, a stainless steel supporting pillar, a stainless steel ball, a compensating plate and an insulated terminal, wherein the stainless steel outer shell is a hollow sphere formed by welding two stainless steel hemispheres, the stainless steel ball is located at the spherical center of the stainless steel outer shell and is connected with the insulated terminal through the stainless steel supporting pillar, the insulated terminal is fixed to the stainless steel outer shell, an inflating hole is formed in the stainless steel outer shell, the compensating plate is made of tin, the thickness of the compensating plate is 1.5 mm-2 mm, and the compensating plate is attached to the stainless steel outer shell and accounts for 60%-70% the area of the stainless steel outer shell. The standard high-pressure ionization chamber overcomes the defect of high low-energy response of an existing high-pressure ionization chamber, and meanwhile reduces errors of measurement results of a cosmic ray ionization ingredient dose rate.

Description

technical field [0001] The invention relates to a gas detector, in particular to a standard high-pressure ionization chamber and a preparation method thereof. Background technique [0002] The measurement standard instrument is in the middle link of the national verification system, and plays a role in linking the previous and the next. The "standard value" or "conventional truth value" of the rate. At present, the probes used in the continuous monitoring system of environmental radiation dose rate in the world are mainly GM counter tubes and high-pressure ionization chambers, and a small part of them use semiconductor and NaI probes. There is no standard instrument for environmental radiation dose rate measurement in the world. Through the comparison of environmental radiation continuous monitoring instruments carried out in 1999 in the ionizing radiation testing center of the Danish National Laboratory and the German PTB underground ultra-low background laboratory in EU c...

AI Technical Summary

Problems solved by technology

However, there are large errors in the measurement results of the dose rate of cosmic ray ionization components in ambient ionizing radiation, so it is not suitable as a standard ionization chamber.

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