Afterpulse prediction for SUBMET experiment
Abstract
The SUB-Millicharge ExperimenT (SUBMET) investigates an unexplored parameter space of millicharged particles with mass 1.6 GeV/c and charge . The detector consists of an Eljen-200 plastic scintillator coupled to a Hamamatsu Photonics R7725 photomultiplier tube (PMT). PMT afterpulses, delayed pulses produced after an energetic pulse, have been observed in the SUBMET readout system, especially following primary pulses with a large area. We present a prediction method for afterpulse rates based on measurable parameters, which reproduces the observed rate with approximately 20\% precision. This approach enables a better understanding of afterpulse contributions and, consequently, improves the reliability of background predictions.
Cite
@article{arxiv.2510.19724,
title = {Afterpulse prediction for SUBMET experiment},
author = {Claudio Campagnari and Sungwoong Cho and Suyong Choi and Seokju Chung and Matthew Citron and Ryan De Los Santos and Albert De Roeck and Martin Gastal and Seungkyu Ha and Andy Haas and Christopher Scott Hill and Byeong Jin Hong and Haeyun Hwang and Insung Hwang and Hoyong Jeong and Minseo Kim and Hyunki Moon and Jayashri Padmanaban and Ryan Schmitz and Changhyun Seo and David Stuart and Juan Salvador Tafoya Vargas and Eunil Won and Jae Hyeok Yoo and Jinseok Yoo and Ayman Youssef and Ahmad Zaraket and Haitham Zaraket and Collin Zheng},
journal= {arXiv preprint arXiv:2510.19724},
year = {2026}
}
Comments
13 pages, 9 figures