JUNO 20-inch PMT and electronics system characterization using large pulses of PMT dark counts at the Pan-Asia testing platform

TL;DR

This paper characterizes the JUNO 20-inch PMT and its electronics system using large pulses from dark counts, providing insights into their response and after pulse behavior to enhance detector performance understanding.

Contribution

It presents a novel characterization method using large dark count pulses to analyze the PMT and electronics response in the JUNO experiment.

Findings

Detailed response profiles of the PMT and electronics system.

Insights into after pulse behavior and response linearity.

Enhanced understanding of detector performance parameters.

Abstract

The main goal of the JUNO experiment is to determine the neutrino mass ordering with a 20kt liquid-scintillator detector. The 20-inch PMT and its 1F3 (one for three) electronics are crucial to realize the excellent energy resolution of at least 3% at 1MeV. The knowledge on the PMT and 1F3 electronics response is critical for detector performance understanding. A study of the JUNO 20-inch PMT and 1F3 electronics system characterization is presented using large pulses of PMT dark count at the Pan-Asia testing platform in China. Thanks to its broad amplitude range and high rate, the large pulse signals are also used to investigate the PMT after pulse response.