arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.04279astro-ph.IMhep-ex
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使用Mini-EUSO进行Laser测试

Laser test with Mini-EUSO

Viktoria Kungel, Mario E. Bertaina, Francesca Bisconti, Marco Casolino, Johannes Eser, Lawrence Wiencke, JEM-EUSO Collaboration

摘要:

Mini-EUSO(极端宇宙空间天文台)是一个小型宇宙射线探测器原型,将测量地球的紫外线辐射和其他太空大气现象。它将被放置在国际空间站(ISS)的一个紫外线透明窗口后面。计划于今年(2019年)推出。Mini-EUSO由多阳极光电倍增管(MAPMT)相机和$25$ cm直径菲涅耳透镜系统组成,具有\ang{44}视场(FoV)、$6.5$ km $^2$地面空间分辨率和$2.5\ μ$ s时间分辨率。原则上,Mini-EUSO将对能量高于$10^{21}$ eV的宇宙射线的广泛空气簇射(EAS)敏感。一个可移动的、可操纵的紫外激光系统将被用来测试Mini-EUSO的预期能量阈值和性能。该激光系统将被驱动到美国西部的偏远地区,并在国际空间站在黑夜期间经过头顶时瞄准Mini-EUSO的视野。它将发射脉冲$355$ nm UV激光,以在检测器中产生短的光速轨迹。该轨迹的亮度将类似于由高达$10^{21}$ eV的宇宙射线产生的EAS的轨迹。激光能量可选择,最大值约为每脉冲$90$ mJ。能量校准因子在$5\ \% $内稳定。激光系统和Mini-EUSO的特性已在JEM-EUSO OffLine软件框架内实现,激光模拟研究正在进行中,以确定执行现场测量的最佳方式。

英文摘要:

Mini-EUSO (Extreme Universe Space Observatory) is a small-scale prototype cosmic-ray detector that will measure Earth`s UV emission and other atmospheric phenomena from space. It will be placed in the International Space Station (ISS) behind a UV-transparent window looking to the nadir. The launch is planned this year (2019). Consisting of a multi-anode photomultiplier (MAPMT) camera and a $25$ cm diameter Fresnel lens system, Mini-EUSO has a \ang{44} field of view (FoV), a $6.5$ km$^2$ spatial resolution on the ground and a $2.5\ μ$s temporal resolution. In principle, Mini-EUSO will be sensitive to extensive air shower (EAS) from cosmic-rays with energies above $10^{21}$ eV. A mobile, steerable UV laser system will be used to test the expected energy threshold and performance of Mini-EUSO. The laser system will be driven to remote locations in the Western US and aimed across the field of view of Mini-EUSO when the ISS passes overhead during dark nights. It will emit pulsed $355$ nm UV laser light to produce a short speed-of-light track in the detector. The brightness of this track will be similar to the track from an EAS resulting from a cosmic-ray of up to $10^{21}$ eV. The laser energy is selectable with a maximum of around $90$ mJ per pulse. The energy calibration factor is stable within $5\ \% $. The characteristics of the laser system and Mini-EUSO have been implemented inside the JEM-EUSO OffLine software framework, and laser simulation studies are ongoing to determine the best way to perform a field measurement.

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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