Proton irradiation of plastic scintillator bars for POLAR-2

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2023-07-22 DOI:10.1007/s10686-023-09906-8

Slawomir Mianowski, Nicolas De Angelis, Kamil Brylew, Johannes Hulsman, Tomasz Kowalski, Sebastian Kusyk, Zuzanna Mianowska, Jerzy Mietelski, Dominik Rybka, Jan Swakon, Damian Wrobel

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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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质子辐照用于 POLAR-2 的塑料闪烁条。

POLAR-2 是一种基于塑料闪烁体的康普顿偏振计，目前正在开发之中，计划于 2025 年发射到中国空间站。其目的是通过对伽马射线暴的瞬时发射进行高精度偏振测量，为我们了解伽马射线暴提供新的线索。该仪器的平均轨道高度为 383 千米，倾角为 42°，将受到宇宙射线和太阳活动的背景辐射。在这项工作中，我们测试了 Eljen Technology 公司生产的塑料闪烁条 EJ-200 和 EJ-248M 在类似空间条件下的性能。这两种类型的闪烁体都接受了 58 MeV 质子的辐照，辐照剂量从 1.89 Gy（相当于 POLAR-2 在太空中的 13 年）到 18.7 Gy 不等，远远超出了 POLAR-2 的预期寿命。本文讨论了闪烁体各自的特性，包括光产率、发射和吸收光谱，以及质子辐照引起的活化分析。闪烁体活化分析显示，β+衰变占主导地位，其典型的伽马射线能量线为 511 千伏。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Astronomy 地学天文-天文与天体物理

CiteScore

5.30

自引率

3.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.