Radiation effect on the polymer-based capacitive relative humidity sensors

The sensitivity of polymer-based capacitive relative humidity (RH) sensors after irradiation with neu-trons, electrons and protons was measured. Degradation consists of the decreasing of the upper RH limit that can be measured. At the same time, low RH-level sensitivity is almost stable. After 30 krad of ab-sorption dose, RH cut off is equal to 85% of max value, after 60 krad-40%. Degradation reduces after annealing which indicates high radiation sensitivity of the internal circuit in comparison to RH-sensing polymer film. (c) 2022 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

The sensitivity of polymer-based capacitive relative humidity (RH) sensors after irradiation with neutrons, electrons, and protons was measured. The degradation of the sensors results in a decrease in the upper limit of measurable RH values, while the sensitivity to low RH levels remains stable. Annealing can partially restore the performance of the sensors, indicating a higher radiation sensitivity of the internal circuit compared to the RH-sensing polymer film.