Jie's Experimental Method

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. The signal from the SiPM was then connected to an osciloscope which could display the results of the experiment. Since the experiment was very sensitive to ambient light, wires (from the power supplies, signals from the thermometer and SiPM... etc.) had to be connected to a ______________. This ____________ was built right into the walls of the box to prevent any ambient light from slipping through the cracks.

Calibration

During data collection, the Oscilloscope was conneted to a server with data collection software. The rate at which the data was colleced was one waveform per second. Several trials were run at different temperatures Temperatures Each trial ran for at least ___ house and consisted of ___Data___ Data.

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