A Newly Developed Multi-Kilo-channel High-Speed and High-Precision Waveform Digitization System for Jinping Neutrino Experiment
Abstract
Solar neutrinos provide an effective means of studying stellar evolution and neutrino oscillation. The Jinping Neutrino Experiment, located at the China Jinping Underground Laboratory, plans to develop a 500-ton liquid scintillator detector to study solar neutrinos by 2026. This will become the eighth solar neutrino observatory globally. Recently, a mixed neutrino detection method based on waveform readout has been proposed. This method effectively reduces isotropic background signals and enhances the sensitivity of Carbon-Nitrogen-Oxygen neutrino detection. However, existing solar neutrino experiments only capture charge and time information, limited by the performance of their electronic systems. Therefore, this paper proposes a 4000-channel, high-speed, high-precision waveform digitization system. The system is designed based on the CPCI protocol and is equipped with 1 GSPS/13-bit ADCs and White Rabbit nodes. Additionally, a 30-channel waveform digitization system was designed and validated using the 1-ton prototype. Experimental results indicate a maximum reference clock skew of 85.6 ps between channels in the waveform digitization system. The maximum acceptable event rate of the system is 193.5 kHz. These experimental results demonstrate that the waveform digitization system developed in this paper meets the JNE experiment’s physical requirements and provides a foundation for the design of a 4000-channel electronics system.
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CJPL,Electronics system,Neutrino experiment
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