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arXiv 1104.2336astro-ph.IMastro-ph.HE
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模拟所提出的gamma-ray检测器HiSCORE的预期性能

Simulation of the expected performance for the proposed gamma-ray detector HiSCORE

Daniel Hampf, Martin Tluczykont, Dieter Horns

摘要:

HiSCORE项目旨在为伽马射线天文学开辟一个新的能量窗口:能量范围超过30 TeV,最高可达几PeV。为此,正在设计一种新的探测器系统。它由一个大型的非成像切伦科夫探测器阵列组成,每个探测器的光敏面积为0.5平方米。探测器的总有效面积为100平方公里。150米的大的站间距离和简单和廉价的站设计将使这样一个大面积的仪器是可行的。开发了一个详细的探测器模拟和事件重建系统,并与CORSIKA空气簇射模拟结合使用,以估计探测器对伽马射线点源的灵敏度。在标准配置中,伽马射线的阈值为44 TeV(50%触发效率),而在100 TeV以上,点源的最小可探测通量低于10^(-13)erg /(s cm ^2)。几个选项,以降低检测器的能量阈值已被审查。通过100米的较小站间距,阈值降低到34 TeV,并且如果探测器设置在海拔2000米的高度,则进一步降低到24 TeV。然而,在150米的间隔处,较高的高度对能量阈值没有积极影响。如果探测器站由小的、独立的2x2子阵列组成,则阈值也可以降低。在这种情况下,站间距对于阈值来说并不重要,但是更高的高度再次进一步降低阈值。

英文摘要:

The HiSCORE project aims at opening up a new energy window in gamma-ray astronomy: The energy range above 30 TeV and up to several PeV. For this, a new detector system is being designed. It consists of a large array of non-imaging Cherenkov detectors with a light sensitive area of 0.5 square metres each. The total effective area of the detector will be 100 square kilometres. A large inter-station distance of 150 metres and a simple and inexpensive station design will make the instrumentation of such a large area feasible. A detailed detector simulation and event reconstruction system has been developed and used in conjunction with the CORSIKA air-shower simulation to estimate the sensitivity of the detector to gamma-ray point sources. The threshold for gamma-rays is 44 TeV (50% trigger efficiency) in the standard configuration, and the minimal detectable flux from a point source is below 10^(-13) erg / (s cm^2) above 100 TeV. Several options to lower the energy threshold of the detector have been examined. The threshold is decreased to 34 TeV by a smaller station spacing of 100 metres, and is further decreased to 24 TeV if the detector is set up at an altitude of 2000 metres above sea level. At a spacing of 150 metres, however, a higher altitude has no positive effect on the energy threshold. The threshold can also be reduced if the detector stations consist of small, independent 2 x 2 sub-arrays. In this case, the station spacing is not significant for the threshold, but again a higher altitude decreases the threshold further.

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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