The Breakdown Voltage of the Gas Electronic Component as a Parameter for Detecting The Rate of Exposure Dose of Gamma Radiation

The mean value of the dynamic breakdown voltage of the gas electronic component as a function of the voltage increase rate for the cases when the data for dynamic breakdown voltage were obtained without the presence of gamma radiation and when the exposure dose rate of this radiation was 5.10-
¹²
C/(kg.s) are shown in the paper. Based on these dependencies, the static breakdown voltage values were determined. The reason for using the mean values lies in the fact that the dynamic breakdown voltage is a quantity of statistical character. Mean values were obtained for groups of 100 dynamic breakdown voltage data that were measured by the automatic measurement and data acquisition system that we implement for these purpose. The system used a discretized dynamic method to supply voltage to the component until breakdown, which consists in supplying voltage in steps for a predefined time between two steps. It was shown that gamma radiation leads to a decrease in the dynamic breakdown voltage, which led to the idea that the gas electronic component can be used as a low-dose gamma radiation detector. Verification of this idea was performed based on the change of the mean value of the dynamic breakdown voltage as a function of the gamma radiation exposure dose rate. The results showed that by using this parameter, the presence of gamma radiation can be detected very effectively up to an exposure dose rate 2.10-
¹²
C/(kg.s).