利用中国空间站高能宇宙辐射探测（HERD）装置探测单色gamma-ray谱线的前景
Perspective of monochromatic gamma-ray line detection with the High Energy cosmic-Radiation Detection (HERD) facility onboard China's Space Station
摘要：
HERD是计划在2020年代在中国空间站上运行的高能宇宙辐射探测仪器。它的设计目的是探测高能宇宙射线核、轻子和光子，具有高能量分辨率（$\sim1\%$用于电子和光子，$20\%$用于原子核）和大几何因子（$>3\,{ m^2\,sr}$用于电子和漫射光子，$>2\,{ m^2\,sr}$用于原子核）。在这项工作中，我们讨论了HERD检测单色$γ$射线线的能力，基于模拟的检测器性能。它表明，HERD将是一个最敏感的仪器，用于单色$γ$ -射线搜索之间的能量$\sim10$到几百GeV。在数百GeV以上，切伦科夫望远镜由于其大的有效面积而更加灵敏。作为一个具体的例子，我们表明，一个超对称的暗物质模型的参数空间的一个很好的部分可以探测HERD。
英文摘要：
HERD is the High Energy cosmic-Radiation Detection instrument proposed to operate onboard China's space station in the 2020s. It is designed to detect energetic cosmic ray nuclei, leptons and photons with a high energy resolution ($\sim1\%$ for electrons and photons and $20\%$ for nuclei) and a large geometry factor ($>3\,{ m^2\,sr}$ for electrons and diffuse photons and $>2\,{ m^2\,sr}$ for nuclei). In this work we discuss the capability of HERD to detect monochromatic $γ$-ray lines, based on simulations of the detector performance. It is shown that HERD will be one of the most sensitive instruments for monochromatic $γ$-ray searches at energies between $\sim10$ to a few hundred GeV. Above hundreds of GeV, Cherenkov telescopes will be more sensitive due to their large effective area. As a specific example, we show that a good portion of the parameter space of a supersymmetric dark matter model can be probed with HERD.
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