An observation of a new class of afterpulses with delay time in the range of 70-200 microseconds in classical vacuum photomultipliers

TL;DR

This paper reports the first observation of a new class of afterpulses with delay times around 120 microseconds in classical vacuum photomultipliers, revealing previously uncharacterized behavior.

Contribution

It introduces the discovery of long-delay afterpulses in vacuum photomultipliers, expanding understanding of their afterpulse phenomena.

Findings

Observation of afterpulses with ~120 microseconds delay

First detection of such long-delay afterpulses in vacuum photomultipliers

Implications for photomultiplier performance and modeling

Abstract

We present results of the first observation of afterpulses with extremely long (~120 microseconds) delay time from the main pulse in 8 inch classical vacuum photomultipliers.