Determination of the Recovery Time of Silicon Photomultipliers

This thesis describes the determination of the recovery time of dierent silicon photo- multipliers. The experimental setup uses two LEDs to rst re all the pixels of the SiPM and then probe the recovery process with a second identical light pulse. The SiPM re- covers with an exponential process with two time constants. The recharge of the pixels attributes to the dominating fast time constant and the recharge of the bulk attributes to the slow time constant, which dominates the tail of the recovery. The pixel recovery time is approximately between 7 ns and 50 ns and is smaller for small pixel sizes. The bulk recovery time is between approximately 100 ns and 200 ns and is more dominant for a large pixel size. An increase of the recovery time as a function of the overvoltage has been observed.