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arXiv 2503.02493astro-ph.IM
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2016年COSI气球飞行的自下而上背景模拟

Bottom-up Background Simulations of the 2016 COSI Balloon Flight

Savitri Gallego, Uwe Oberlack, Jan Lommler, Christopher M. Karwin, Andreas Zoglauer, Pierre Jean, Peter von Ballmoos, Carolyn Kierans, Clio Sleator, John A. Tom… 展开作者

Savitri Gallego, Uwe Oberlack, Jan Lommler, Christopher M. Karwin, Andreas Zoglauer, Pierre Jean, Peter von Ballmoos, Carolyn Kierans, Clio Sleator, John A. Tomsick, Steven E. Boggs

AI总结:

本文针对2016年COSI气球飞行开展自下而上的Monte Carlo背景模拟,并用唯象形状修正在0.1–1.6 MeV达到10–20%的数据一致性,为COSI-SMEX任务验证背景建模。

摘要:

Compton Spectrometer and Imager(COSI,康普顿光谱仪与成像仪)是一台旨在巡测0.2–5 MeV天空的康普顿望远镜,由交叉条带锗探测器的紧凑阵列组成。作为其研发工作的一部分,COSI于2016年在NASA的超压气球平台上成功完成了为期46天的飞行。这是COSI Small Explorer(COSI-SMEX)卫星任务的先导,该卫星将于2027年发射进入赤道低地球轨道(530 km)。MeV伽马射线观测受到背景辐射的主导,尤其是宇宙射线相互作用引起的探测器材料活化所致。因此,背景模拟与识别对数据分析至关重要。由于COSI-SMEX探测器将与气球飞行所用探测器相似,气球测量为测试和交叉核对我们面向即将到来的空间任务的背景模拟提供了重要工具。在本工作中,我们对2016年COSI气球飞行的背景发射进行了Monte Carlo模拟。通过加入唯象形状修正,我们在0.1–1.6 MeV能量范围内获得了与数据在10–20%水平上的一致性,并成功再现了由宇宙射线相互作用诱发的大多数活化谱线。

英文摘要:

The Compton Spectrometer and Imager (COSI) is a Compton telescope designed to survey the 0.2-5 MeV sky, consisting of a compact array of cross-strip germanium detectors. As part of its development, in 2016 COSI had a successful 46 day flight on board NASA's Super Pressure Balloon platform. This was a precursor to the COSI Small Explorer (COSI-SMEX) satellite mission that will launch in 2027 into a equatorial low Earth (530 km) orbit. The observation of MeV gamma-rays is dominated by background radiation, especially due to the activation of the detector materials induced by cosmic-ray interactions. Thus, background simulation and identification are crucial for the data analysis. Because the COSI-SMEX detectors will be similar to the ones used for the balloon flight, the balloon measurements provide an important tool for testing and cross-checking our background simulations for the upcoming space mission. In this work we perform Monte Carlo simulations of the background emission from the 2016 COSI balloon flight. Including a phenomenological shape correction, we obtain an agreement with the data at the 10-20% level for energies between 0.1-1.6 MeV, and we successfully reproduce most of the activation lines induced by cosmic ray interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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