Temperature compensation for silicon photomultiplier based detector

A silicon photomultiplier tile comprising:

• a plurality of silicon photomultiplier arrays on a detector die, each of the plurality of silicon photomultiplier arrays including a first plurality of microcells;
• a second plurality of reference microcells dispersed on the die, each of the second plurality of reference microcells including an optically-opaque mask;
• a plurality of respective reference microcell readout circuits, each including a respective charge sensitive amplifier connected to a respective one of the second plurality of reference microcells, each charge sensitive amplifier configured to accumulate a dark current of the respective one of the second plurality of reference microcells during a selected time window;
• a hybrid temperature control circuit configured to receive an output signal from each respective charge sensitive amplifier, and to determine a real-time temperature of the die based on the received output signal;
• the hybrid cooling/heating system configured to provide a temperature compensation and correction control unit with the real-time temperature;
• and
• the temperature compensation and correction control unit configured to adjust a cooling/heating system flow that is provided to the die, the adjustment based on the real-time temperature.