Angle Calibration of emulsion read-out system for gamma-ray telescope by test beam
Angle Calibration of emulsion read-out system for gamma-ray telescope by test beam
复制标题
伽马射线望远镜乳剂读出系统测试光束角度标定
DOI：
10.22323/1.294.0079
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yuya Nakamura
中科院分区：
文献类型：
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作者：
Yuya Nakamura
核乳胶是一种具有亚微米空间分辨率的三维跟踪探测器。近年来，由于扫描速度的提高，核乳胶的应用已扩展到成像领域。乳剂读出系统在角度测量中表现出由折射率差异引起的光学系统误差。在绝对轨道角为45°时，该误差保守估计为0.015 rad，这对于伽马射线望远镜实验来说是一个不可忽视的值。我们已经评估了这个错误的实验使用400 GeV的测试质子束在SPS/CERN。从实验结果来看，在绝对轨迹角为45°时，误差减小到0.001 rad，我们将在本文中报告。
Nuclear emulsion is a three-dimensional tracking detector with a sub-micron spatial resolution. Recently, the applications of nuclear emulsion have been expanding into imaging fields because of the improvement in scanning speed. Emulsion read-out systems exhibit an optical system- atic error in the angular measurement caused by the difference in refractive index. This error is conservatively estimated as 0.015 rad at an absolute track angle of 45°, which is a non-negligible value for the gamma-ray telescope experiment. We have evaluated this error experimentally using a test proton beam of 400 GeV at SPS/CERN. From the experimental results, the error decreased to 0.001 rad at an absolute track angle of 45°, which we will report on in this paper.