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We present herein gain stabilization studies of SiPMs using a climate chamberat CERN. We present results for four detectors not tested before, three fromHamamatsu and one from KETEK. Two of the Hamamatsu SiPMs are novel sensors withtrenches that reduce cross talk. We use an improved readout system with adigital oscilloscope controlled with a dedicated LabView program. We improvedand automized the analysis to deal with large datasets. We have measured thegain-versus-bias-voltage dependence at fixed temperature andgain-versus-temperature dependence at fixed bias voltage to determine the biasvoltage dependence on temperature $V(T)$ for stable gain. We show that the gainremains stable to better than $\pm 0.5\%$ in the $20^\circ \rm C - 30^\circ C$temperature range if the bias voltage is properly adjusted with temperature.

SiPM Gain Stabilization Studies for Adaptive Power Supply