Floating Gate Dosimeter Suitability for Accelerator-Like Environments

In this paper, the suitability of floating gate dosimeter as total ionizing dose (TID) detector in mixed fields, representative of large hadron collider (LHC) radiation environment, has been investigated. Several experiments were performed in order to characterize the dosimeter. Exposures to γ-ray were carried out to study the sensitivity and linearity of the radiation response. Experiments in mixed radiation field were performed at CERN High energy AcceleRator Mixed field facility (CHARM) at CERN together with RadFETs to compare the performances. In particular, the minimum dose to be cumulated in order to obtain the facility calibration factor has been evaluated and discussed. The effect of the temperature on the output signal has been characterized and a compensation method has been developed and implemented. The fading of the output after irradiation was measured in order to evaluate the retention of the analog information.