PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - CRD - Cosmic Ray Direct
On-Orbit Energy Calibration of the Calorimeter on the ISS-CREAM Instrument Using the Boronated Scintillator Detector
Y. Chen*, T. Anderson, S. Coutu, T. LaBree, J. Link, J.W. Mitchell, S.A.I. Mognet, S. Nutter, K. Sakai, J.R. Smith and M. Yu
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Pre-published on: July 05, 2021
Published on:
Abstract
The Cosmic Ray Energetics And Mass instrument on the International Space Station (ISSCREAM)
aims to measure the energy spectra of cosmic ray (CR) nuclei from Z=1 to Z=26
with energies from $10^{12}$ eV to $10^{15}$ eV. The calorimeter (CAL) was designed to measure the energy
of the CR particles. The ISS-CREAM on-orbit data provide evidence that the CAL may have
either suffered from an efficiency problem or its energy scale may be in need of calibration. As a
result, a careful scrutiny of the absolute energy calibration of the CAL is required. We describe an
approach to calibrate the energy scale using the on-orbit data of the boronated scintillator detector,
which is independent of the CAL data and reduces potential bias. We discuss the issues revealed by
the on-orbit data, demonstrate how this can be corrected using the boronated scintillator detector
and present preliminary results.
DOI: https://doi.org/10.22323/1.395.0074
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