超大面积伽马射线太空望远镜性能模拟研究

IF 3.6 1区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Science and Techniques Pub Date : 2024-08-29 DOI:10.1007/s41365-024-01499-x
Xu Pan, Wei Jiang, Chuan Yue, Shi-Jun Lei, Yu-Xin Cui, Qiang Yuan
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引用次数: 0

摘要

甚大区域伽马射线空间望远镜(VLAST)是一个拟议的飞行任务概念,目的是通过康普顿散射和电子-正电子对产生机制探测伽马射线光子,从而能够探测到能量从 MeV 到 TeV 的光子。该项目旨在利用一个反重合探测器、一个兼作低能量热计的跟踪探测器和一个高能成像量热计,从低地轨道对伽马射线天空进行一次全面巡天。我们利用 GEANT4 工具包开发了该探测器的蒙特卡罗模拟应用程序,以评估仪器性能,包括有效面积、角度分辨率和能量分辨率,并探索了探测器配置的具体优化方案。我们基于仿真的分析表明,VLAST目前的设计在物理上是可行的,其接受度超过10 \(\mathrm m^2\, \text{sr}\),是费米-LAT的四倍,在10 GeV的能量分辨率优于2%,在10 GeV的角度分辨率优于0.2\(^\circ\)。VLAST项目有望为伽马射线天文学领域做出重大贡献,并增进我们对宇宙的了解。
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Simulation study of the performance of the Very Large Area gamma-ray Space Telescope

The Very Large Area gamma-ray Space Telescope (VLAST) is a mission concept proposed to detect gamma-ray photons through both Compton scattering and electron–positron pair production mechanisms, thus enabling the detection of photons with energies ranging from MeV to TeV. This project aims to conduct a comprehensive survey of the gamma-ray sky from a low-Earth orbit using an anti-coincidence detector, a tracker detector that also serves as a low-energy calorimeter, and a high-energy imaging calorimeter. We developed a Monte Carlo simulation application of the detector using the GEANT4 toolkit to evaluate the instrument performance, including the effective area, angular resolution, and energy resolution, and explored specific optimizations of the detector configuration. Our simulation-based analysis indicates that the current design of the VLAST is physically feasible, with an acceptance above 10 \(\mathrm m^2\, \text{sr}\) which is four times larger than that of the Fermi-LAT, an energy resolution better than 2% at 10 GeV, and an angular resolution better than 0.2\(^\circ\) at 10 GeV. The VLAST project promises to make significant contributions to the field of gamma-ray astronomy and enhance our understanding of the cosmos.

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来源期刊
Nuclear Science and Techniques
Nuclear Science and Techniques 物理-核科学技术
CiteScore
5.10
自引率
39.30%
发文量
141
审稿时长
5 months
期刊介绍: Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.
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