多层压缩气体切伦科夫辐射器的μ介子谱仪及其应用
Fieldable muon spectrometer using multi-layer pressurized gas Cherenkov radiators and its applications
摘要：
宇宙线μ子作为一种非常规的辐射探针在许多领域有着广泛的应用。为了在工程应用中利用宇宙射线μ子，必须知道两个重要的量，轨迹和动量。μ子的轨迹很容易重建使用具有高空间分辨率的双重探测器阵列。然而，精确测量μ介子动量是很难实现的，而不部署大型和昂贵的光谱仪，如螺线管磁铁。在这里，我们提出了一种新的方法来估计μ子动量使用多层加压气体切伦科夫辐射。这是精确的，便携的，紧凑的（<1 m3），并且很容易与现有的μ子探测器耦合，而不需要笨重的磁性或飞行时间光谱仪。结果表明，我们的新型μ子谱仪不仅可以在0.1至10.0 GeV/c的动量范围内以+-0.5 GeV/c的分辨率测量μ子动量，而且还可以高精度（~90%）重建宇宙μ子谱。
英文摘要：
Cosmic ray muons have been considered as a non-conventional radiation probe in various applications. To utilize cosmic ray muons in engineering applications, two important quantities, trajectory and momentum, must be known. The muon trajectories are easily reconstructed using two-fold detector arrays with a high spatial resolution. However, precise measurement of muon momentum is difficult to be achieved without deploying large and expensive spectrometers such as solenoid magnets. Here, we propose a new method to estimate muon momentum using multi-layer pressurized gas Cherenkov radiators. This is accurate, portable, compact (< 1m3), and easily coupled with existing muon detectors without the need of neither bulky magnetic nor time-of-flight spectrometers. The results show that not only our new muon spectrometer can measure muon momentum with a resolution of +-0.5 GeV/c in a momentum range of 0.1 to 10.0 GeV/c, but also we can reconstruct cosmic muon spectrum with high accuracy (~90%).
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