Results from the CsI Calorimeter onboard the 2023 ComPair Balloon Flight

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2405.06839v3.pdf (8.02 MB)

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http://arxiv.org/abs/2405.06839

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https://doi.org/10.48550/arXiv.2405.06839
 http://hdl.handle.net/11603/34617

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UMBC Faculty Collection
UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)

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Author/Creator ORCID

https://orcid.org/0000-0003-2916-6955

Date

2024-05-16

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journal articles
preprints
Text

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Citation of Original Publication

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Subjects

Astrophysics - Instrumentation and Methods for Astrophysics
Nuclear Experiment

Abstract

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.