A High Voltage Power Supply for Photomultiplier Tube Applications

This paper introduces a stabilized high precision high voltage power supply for photomultiplier tubes. The output voltage can be adjusted from zero to -3kV and the nominal output current is 5mA. Both load regulation and line regulation values are below 0.01% and the output voltage ripple is less than 0.3V. This power supply can measure both voltage and currents. The input supply voltage is 220V ac and the output is short circuit protected. To verify the feasibility and functionality of the proposed power supply, simulations are performed. Moreover, a prototype is designed and fabricated. The results confirm that the presented power supply meet the specifications required for photomultiplier tube applications.