High Voltage System for the Double Chooz Experiment

AbstractThe Double Chooz experiment, which is dedicated to a measurement of the mixing angle θ13 adopts 468 photomultiplier tubes (PMTs) to observe the scintillation light generated by neutrino and background signals. The high voltage (HV) system for the PMTs is important for the detector, in order to ensure the stability of the PMT gain. We make use of HV frames and modules produced by CAEN, and have developed the online control and monitoring systems. In order to obtain good correspondence between output and monitoring voltage, the HV modules have been calibrated using a special module developed by CAEN. We confirmed good accuracy and stability of HV for the physics analysis