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A darkened denclosed box was built to house the SiPM. Since electromagnetic radiaition(in the form of heat) can fire the SiPM very efficiently , the box had to eliminate as much ambient light as possible. It consisited of a 3' x 1' x 1' box, made of wood that was painted black. On one end of the box, there was an LED and pulser circuit for the purpose of calibrating the SiPM. On the other end, the SiPM was mounted on a metal arm with heat conductive material to make sure that the temperature of the arm matched the temperature of the SiPM. Attached to the metal arm was a temperature controller. The temperature controler was simply a heat sink that was receiving constant feedback from a thermometer on the metal arm. If the temperature was too low, then the thermometer would sned a signal back to the heat sink, which would then heat up the arm and also, the SiPM.
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