Estimation of errors of RADFET-based dosimeters

We have estimated various types of errors dosimeters based on n-channel field-effect transistors with a metal-insulator-semiconductor structure (called as RADFETs). The radiation sensitivity have been experimentally investigated. There were measured the gate voltage of RADFET -based dosimeter as function of total ionizing dose (TID) at constant values of the drain current and the drain - source voltage, as well as the current -voltage characteristics before and after irradiations at different TID. We showed how radiation sensitivity and errors of sensors are depending on TID and electrical modes. Electro-physical models were proposed to interpret obtained results.