论文标题
使用多层加压C3F8气体辐射器的非线性Cherenkov muon光谱仪
Non-linear Cherenkov Muon Spectrometer Using Multi-Layer Pressurized C3F8 Gas Radiators
论文作者
论文摘要
使用GEANT4模拟研究了一种新的Cherenkov Muon光谱仪，并使用多样化的C3F8气体辐射器和非线性阈值MUON动量水平进行了研究。尽管其紧凑的大小（<1M3），但在两个方面，光谱仪的性能比早期设计（线性和均匀）的性能显着提高，（i）在所有辐射器中稳定的动量测量分辨率，以及（ii）平衡的预期Cherenkov光子。此外，二氧化碳气体辐射器被较重的气体辐射器C3F8取代，并且散热器的较高动量水平（低气压）的大小被扩大以增加Cherenkov光子的产量。具体而言，对于所有级别的绝对动量分辨率σpσP均由相对动量分辨率σp/p代替。为了证明我们提出的Cherenkov Muon光谱仪的功能，我们介绍了分类速率的结果，这是MUON动量的函数，具有各种鉴别剂水平和重建的宇宙射线MUON光谱。当使用两个或多个歧视因子的组合时，平均分类率为90.08％。此外，我们提出的Cherenkov muon光谱仪成功地重建了宇宙射线启示仪，结果表明，在大多数动量水平中，与实际频谱之间的实际频谱非常一致。
A new Cherenkov muon spectrometer using diversely sized C3F8 gas radiators and nonlinear threshold muon momentum levels was studied using Geant4 simulations. Despite its compact size (<1m3), the performance of the spectrometer was significantly improved over the earlier design (linear and uniform) in two aspects, (i) a stable momentum measurement resolution and (ii) a balanced expected Cherenkov photon yields in all radiators. In addition, CO2 gas radiators are replaced by heavier gas radiators, C3F8, and the sizes of radiators for high momentum levels (low gas pressure) are enlarged to increase the Cherenkov photon yields. Specifically, the absolute momentum resolution, σp, for all levels is replaced by the relative momentum resolution, σp/p. To demonstrate the functionality of our proposed Cherenkov muon spectrometer, we presented the results of classification rates as a function of muon momentum with various discriminator levels and reconstructed cosmic ray muon spectrum. When the combination of two or more discriminators are used, the average classification rate is 90.08%. In addition, our proposed Cherenkov muon spectrometer successfully reconstructed the cosmic ray muon spectrum and the results show a good agreement with the actual spectrum within 1σ in most momentum levels.
