Abstract
Abstract
The Jinping Neutrino Experiment (JNE) aims to construct a
500-ton liquid scintillator detector for detecting and studying
neutrinos. In JNE data analysis, particle energy and position
reconstruction are crucial, with result accuracy closely related to
the performance of the waveform digitization system. This study
developed a quantitative model to explore correlations between
sampling characteristics (effective number of bits and sampling
rate) and detector system performance (single photoelectron charge
spectrum resolution and transfer time spread). Additionally, three
ADCs (Tsinghua ADC13B1G, ADI AD9695, TI ADS54J60) and MCP-PMTs were
utilized to validate the model accuracy. The experimental results
for the system charge spectrum resolution are in alignment with the
theoretical predictions. When the ENOB of the ADC exceeds 10.66-bit
and the sampling rate exceeds 1 GSPS, the system charge spectrum
resolution is better than 45%, approaching the PMT inherent
resolution of 44%. The transfer time spread within the system
demonstrates minimal impact from the ADC sampling characteristics.
These results serve as a reference for upgrading the JNE 60-channel
and 4000-channel readout electronic systems. Additionally, this
study can assist developers in maximizing the performance of physics
experiment readout electronics systems within constrained budgets.