Performance of Large Area Picosecond Photo-Detectors (LAPPD)

TL;DR

This paper presents performance results of Large Area Picosecond Photo-Detectors (LAPPD), highlighting their high gain, low noise, excellent timing and spatial resolution, and high quantum efficiency, demonstrating their suitability for various scientific and practical applications.

Contribution

The paper provides the first comprehensive performance evaluation of recently produced LAPPDs, showcasing their capabilities and potential applications in physics and industry.

Findings

Electron gains up to 10^7 achieved

Single PE timing resolution of ~50 ps RMS

High quantum efficiency with uniform bi-alkali photocathodes

Abstract

We report on performance results achieved for recently produced LAPPDs - largest comercially available planar geometry photodetectors based on microchannel plates. These results include electron gains of up to $10^{7}$, low dark noise rates ($\sim$100 Hz/cm$^{2}$ at a gain of $6\cdot10^6$), single photoelectron (PE) timing resolution of $\sim$50 picoseconds RMS (electronics limited), and single photoelectron spatial resolution along and across strips of 3.2mm (electronics limited) and 0.8 mm RMS respectively and high (about 25\% or higher in some units) QE uniform bi-alkali photocathodes. LAPPDs is a good candidate to be employed in neutrino experiments (e.g. ANNIE, WATCHMAN, DUNE), particle collider experiments (e.g. EIC), neutrinoless double-beta decay experiments (e.g. THEIA), medical and nuclear non-proliferation applications.