Research And Study Of Front End Electronics For Daya Bay Neutrino Experiment

Readout electronic system is an important research project in high energy physics experiments. A reliable and capable readout electronic system plays a key role in the experiments.This dissertation demonstrated the research of photomultiplier tube (PMT) readout electronic system for Daya Bay neutrino experiment. The Front End Electronic (FEE) system for Daya Bay experiment had been developed based on ATLAS and BESâ…¢FEE. The design scheme of FEE is full introduced in this paper.Comparing with other similar Front End Electronic systems designed in Europe and USA, our system has a larger dynamic range and a better resolution for small signals. The conclusion with FEE tested in DAQ,Prototype and Dryrun show that it is feasible to achieve a more accurate charge and time measurement resolution and a wider dynamic range when using our FEE board. The board design is successful and can meet the requirements of PMT readout for Daya Bay Neutrino Experiment.Ringing was found in the PMT signal test, which was an important part of the PMT readout electronic study, and the piezoelectric effect of ceramic capacitors under high voltage was found as the cause of the ringing. That was the first time to find and solve such ringing signal problem in high energy physics experiment home and abroad.The FEE data analysis which study the FEE readout time window,check the performance Flash ADC,analyze the LED event trigger efficiency is a effective way to improve the design of FEE.The basic design of PMT readout electronic system for Daya Bay neutrino experiment has been completed. The final design of FEE system has passed the experts' review in 2009. FEE was applied successfully during DryRun experiment in 2010, and the results of the experiment showed that the capability and reliability of the FEE could fulfill the demand of Daya Bay experiment.