The HPS electromagnetic calorimeter
Abstract
The Heavy Photon Search experiment (HPS) is searching for a new gauge boson, the so-called "heavy photon." Through its kinetic mixing with the Standard Model photon, this particle could decay into an electron-positron pair. It would then be detectable as a narrow peak in the invariant mass spectrum of such pairs, or, depending on its lifetime, by a decay downstream of the production target. The HPS experiment is installed in Hall-B of Jefferson Lab. This article presents the design and performance of one of the two detectors of the experiment, the electromagnetic calorimeter, during the runs performed in 2015-2016. The calorimeter's main purpose is to provide a fast trigger and reduce the copious background from electromagnetic processes through matching with a tracking detector. The detector is a homogeneous calorimeter, made of 442 lead-tungstate (PbWO4) scintillating crystals, each read out by an avalanche photodiode coupled to a custom trans-impedance amplifier.
Keywords
Cite
@article{arxiv.1610.04319,
title = {The HPS electromagnetic calorimeter},
author = {Ilaria Balossino and Nathan Baltzell and Marco Battaglieri and Mariangela Bondi and Emma Buchanan and Daniela Calvo and Andrea Celentano and Gabriel Charles and Luca Colaneri and Annalisa D'Angelo and Marzio De Napoli and Raffaella De Vita and Raphael Dupre and Hovanes Egiyan and Mathieu Ehrhart and Alessandra Filippi and Michel Garcon and Nerses Gevorgyan and Francois-Xavier Girod and Michel Guidal and Maurik Holtrop and Volodymyr Iurasov and Valery Kubarovsky and Kenneth Livingston and Kyle McCarty and Jeremy McCormick and Bryan McKinnon and Mikhail Osipenko and Rafayel Paremuzyan and Nunzio Randazzo and Emmanuel Rauly and Benjamin Raydo and Emmanuel Rindel and Alessandro Rizzo and Philippe Rosier and Valeria Sipala and Stepan Stepanyan and Holly Szumila-Vance and Lawrence Weinstein},
journal= {arXiv preprint arXiv:1610.04319},
year = {2017}
}
Comments
34 pages, 25 figures