Single photon detector for laser time-transfer link to next-gen Galileo satellite – Power source radiation resistance

The gamma radiation test of an DC/DC integrated converter is presented. Three samples of the device were irradiated by a total dose of 74 Gy provided by a cobalt source. This component is intended for improoving control circuit of solid state single photon detector. The detector is a key part of the laser time-transfer link payload for the next generation of Galileo GNSS satellites. These radiation tests were successful and will be included in a development of a new generation of solid state photon counting detector control circuits for space missions.