Study on Relative Collection Efficiency of PMTs with Point Light

TL;DR

This paper investigates the relative collection efficiency of large-area PMTs with various sizes and collector structures to improve detector simulations in neutrino and dark matter experiments.

Contribution

It provides a detailed comparison of collection efficiencies across different PMT types, aiding accurate detector modeling.

Findings

Identified differences in collection efficiency among PMT models.

Validated measurement methods with multiple light intensities.

Results support improved simulation accuracy for neutrino detectors.

Abstract

Photon detection efficiency is a key parameter of PMTs in high-precision neutrino and dark matter experiments, while most of these experiments are focus on quantum efficiency. More and more experiments are trying to know the detection efficiency for the simulation of the detector such as JUNO. In order to have a good understanding on photon detection efficiency of the large-area PMT , we conducted a detailed comparison of the relative collection efficiencies of a series of dynode PMT with different sizes and collector structures. This study is based on the tests of relative quantum efficiency and relative detection efficiency with cross check by several light intensities. The testing and results will be discussed.