Gain stabilization of SiPMs

We have designed and developed the adaptive power supply to keep the gain of SiPMs in the analog hadron calorimeter of the CALICE Linear Collider detector stable at the level of 1%. This power supply compensates automatically the bias voltage for temperature variations in the range 5 °C to 40 °C. It operates in the voltage range 15 V to 90 V suitable for most of SiPMs on the market. We demonstrate the performance of the gain stability with a prototype that was produced in industry after measurements with a test board. We checked the gain stability for several types of SiPMs from three producers - Hamamatsu, KETEK and CPTA. This adaptive power supply can be easily used in applications beyond the calorimetry in particle physics.