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Proton irradiation of plastic scintillator bars for POLAR-2. | LitMetric

AI Article Synopsis

  • - POLAR-2 is a newly developed Compton polarimeter set to launch in 2025 to study Gamma-Ray Bursts by making precise polarization measurements of their emissions.
  • - The instrument will operate in low Earth orbit (383 km altitude) and will face background radiation challenges from cosmic rays and solar activity.
  • - Researchers tested plastic scintillator materials, EJ-200 and EJ-248M, under conditions simulating space radiation, assessing their light yield and spectral properties after exposure to high-energy protons, which mimic years of radiation in space.

Article Abstract

POLAR-2, a plastic scintillator based Compton polarimeter, is currently under development and planned for a launch to the China Space Station in 2025. It is intended to shed a new light on our understanding of Gamma-Ray Bursts by performing high precision polarization measurements of their prompt emission. The instrument will be orbiting at an average altitude of 383 km with an inclination of 42° and will be subject to background radiation from cosmic rays and solar events. In this work, we tested the performance of plastic scintillation bars, EJ-200 and EJ-248M from Eljen Technology, under space-like conditions, that were chosen as possible candidates for POLAR-2. Both scintillator types were irradiated with 58 MeV protons at several doses from 1.89 Gy(corresponding to about 13 years in space for POLAR-2) up to 18.7 Gy, that goes far beyond the expected POLAR-2 life time. Their respective properties, expressed in terms of light yield, emission and absorption spectra, and activation analysis due to proton irradiation are discussed. Scintillators activation analyses showed a dominant contribution of β + decay with a typical for this process gamma-ray energy line of 511 keV.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10746763PMC
http://dx.doi.org/10.1007/s10686-023-09906-8DOI Listing

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