The ComPair gamma-ray telescope is a technology demonstrator for a future gamma-ray telescope called the All-sky Medium Energy Gamma-ray Observatory (AMEGO). The instrument is composed of four subsystems, a double-sided silicon strip detector, a virtual Frisch grid CdZnTe calorimeter, a CsI:Tl based calorimeter, and an anti-coincidence detector (ACD). The CsI calorimeter's goal is to measure the position and energy deposited from high-energy events. To demonstrate the technological readiness, the calorimeter has flown onboard a NASA scientific balloon as part of the GRAPE-ComPair mission and accumulated around 3 hours of float time at an altitude of 40 km. During the flight, the CsI calorimeter observed background radiation, Regener-Pfotzer Maximum, and several gamma-ray activation lines originating from aluminum.
@article{arxiv.2405.06839,
title = {Results from the CsI Calorimeter onboard the 2023 ComPair Balloon Flight},
author = {Daniel Shy and Richard S. Woolf and Clio Sleator and Bernard Phlips and J. Eric Grove and Eric A. Wulf and Mary Johnson-Rambert and Mitch Davis and Emily Kong and Thomas Caligiure and A. Wilder Crosier and Aleksey Bolotnikov and Nicholas Cannady and Gabriella A. Carini and Regina Caputo and Jack Fried and Priyarshini Ghosh and Sean Griffin and Elizabeth Hays and Sven Herrmann and Carolyn Kierans and Nicholas Kirschner and Iker Liceaga-Indart and Zachary Metzler and Julie McEnery and John Mitchell and A. A. Moiseev and Lucas Parker and Alfred Dellapenna and Jeremy S. Perkins and Makoto Sasaki and Adam J. Schoenwald and Lucas D. Smith and Janeth Valverde and Sambid Wasti and Anna Zajczyk},
journal= {arXiv preprint arXiv:2405.06839},
year = {2024}
}