Silicon Photon Multiplier
Keywords:
Silicon photo multiplier, Geiger temperature, gain coefficient, programmable power supply, GUIAbstract
programmable power supply with temperature compensation is essentially useful for powering a Silicon photon multiplier (Si PM) which is basically an avalanche photodiode detector in reverse bias configuration operating at limited Geiger mode. These devices were operated at atmospheric temperatures and it was observed that the temperature-gain coefficient was 50mV/°C and a method to compensate this shift in operating point was essential wherein actual temperature will be sensed and accordingly a potential will be applied to null the effects of temperature on biasing voltage. The second part of this project deals with high precision power supply as the intrinsic characteristics of Si PM vary from device to device and hence the biasing point is not the same for all devices, to cope with this a programmable DC power supply with high resolution (1mV in 100V) interfaced with computer will serve the purpose.
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