Trigger System On Reverse Beta Decay Reaction Chain Of Anti-electron-neutrino

The experimental research of neutrinos plays an important role in understanding the evolution of the universe, and is a most possible way to discover the possible new physics.Based on the physics goals and the requirements of different neutrino experiments, this paper analyzed the features of the inverse beta decay reaction chain of anti-electron-neutrino used in the neutrino detection. Relevent electronic trigger systems have been designed, realizing the detection of neutrino signals.The Super-Kamiokande Neutrino experiment is suffering from a cosmis muon neutrino background in detecting supernova relic neutrino. To solve this problem, the paper has developed a new forced trigger technique to provide a coincident detection on both the prompt positron signal and the delayed neutron from the inversed decay. This technique includes a hardware trigger module and a software trigger algorithm, which are both compatible with SK's present system. This technique has also greatly suppressed the cosmic ray background and increased the significance of signal; the neutrino capture time curve in pure water was observed in the first time and the corresponding lifetime was also measured to be (201±13)μs.The Daya Bay reactor neutrino oscillation experiment requires a very high precision to measure the mixing angleθ13 downto 1%. To meet this requirement, a great efford has been made to design the the whole trigger system: the multi indepentdent trigger algorithms are implemented to cross check each other to ensure a high trigger efficiency; the use of high speed programmable logic can increase the flexibility of trigger system; the mechanism of cross-trigger among different sub-detectors enables the ability in the background study; the independent high-accurate clock system can provide a uniform time reference for the distributed experiment halls, giving a time-relation among events from different halls without increasing the detector correlation.