First observations of speed of light tracks by a fluorescence detector looking down on the atmosphere
First observations of speed of light tracks by a fluorescence detector looking down on the atmosphere
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DOI：
10.1088/1748-0221/13/05/p05023
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发表时间：
2018-05-01
影响因子：
1.3
通讯作者：
Marchi, A. Zuccaro
中科院分区：
文献类型：
--
作者：
Abdellaoui, G.;Abe, S.;Marchi, A. Zuccaro
欧洲宇航组织气球是日本实验舱(JEM-EUSO)上的极端宇宙空间天文台的探路者任务。它于2014年8月25日无月之夜从加拿大蒂明斯发射升空。在维持38公里的目标高度5个小时后，飞行圆满结束。任务的一部分是使用一架配备了三个紫外线光源(LED、氙气闪光灯和激光)的直升机进行2.5小时的下方飞行，以执行飞行校准并检查探测器测量以光速移动的轨迹的能力。我们描述了直升机激光系统和飞行中的细节，以及激光轨迹是如何在数据中记录和找到的。这是第一批通过俯视大气层的荧光探测器测量到的激光轨迹。最后，我们给出了激光轨迹相对于探测器的方向的第一次重建。
EUSO-Balloon is a pathfinder mission for the Extreme Universe Space Observatory onboard the Japanese Experiment Module (JEM-EUSO). It was launched on the moonless night of the 25(th) of August 2014 from Timmins, Canada. The flight ended successfully after maintaining the target altitude of 38 km for five hours. One part of the mission was a 2.5 hour underflight using a helicopter equipped with three UV light sources (LED, xenon flasher and laser) to perform an inflight calibration and examine the detectors capability to measure tracks moving at the speed of light. We describe the helicopter laser system and details of the underflight as well as how the laser tracks were recorded and found in the data. These are the first recorded laser tracks measured from a fluorescence detector looking down on the atmosphere. Finally, we present a first reconstruction of the direction of the laser tracks relative to the detector.