ALICE 前向量能器电磁与强子原型段性能
仪器与探测器
2024-07-18 v2
摘要
我们展示了 ALICE 前向量能器（FoCal）全长度原型的性能。该探测器由硅-钨电磁采样量能器（纵向与横向分段，FoCal-E，约 20）和强子铜-闪烁光纤量能器（FoCal-H，约 5）组成。数据于 2021 至 2023 年间在 CERN PS 与 SPS 束流线上获取，强子（电子）束流能量最高达 350（300）GeV。关于 FoCal-E，我们报告了所有 pad 层对最小电离粒子的响应的全面分析。电磁簇射的纵向簇射分布以 1 的逐层分段测量。作为最终探测器在电磁簇射中性能的预估，我们展示了全能量范围内的线性，并表明能量分辨率满足物理需求。此外，通过量化横向簇射宽度研究了分辨双簇射事件的性能。关于 FoCal-H，我们报告了其对 60 至 350 GeV 强子束流响应的详细分析。结果与用测试束流装置的 Geant4 模型获得的模拟进行比较，其中尤其 FoCal-E 与数据吻合良好。FoCal-E 的能量分辨率在能量大于 100 GeV 时低于 3%。FoCal-H 对强子束流的响应呈线性，但存在显著截距，约为模拟值的 2 倍。其分辨率非高斯且普遍大于模拟值，使用 FWHM 量化，从 100 GeV 时约 16% 降至 350 GeV 时约 11%。与模拟的差异（在低强子能量处尤为明显）需进一步研究。
引用
@article{arxiv.2311.07413,
title = {Performance of the electromagnetic and hadronic prototype segments of the ALICE Forward Calorimeter},
author = {M. Aehle and J. Alme and C. Arata and I. Arsene and I. Bearden and T. Bodova and V. Borshchov and O. Bourrion and M. Bregant and A. van den Brink and V. Buchakchiev and A. Buhl and T. Chujo and L. Dufke and V. Eikeland and M. Fasel and N. Gauger and A. Gautam and A. Ghimouz and Y. Goto and R. Guernane and T. Hachiya and H. Hassan and L. He and H. Helstrup and L. Huhta and M. Inaba and T. Inukai and T. Isidori and F. Jonas and T. Kawaguchi and R. Keidel and M. Kim and V. Kozhuharov and T. Kumaoka and L. Kusch and C. Loizides and Y. Melikyan and Y. Miake and N. Minafra and J. Nystrand and N. Novitzky and T. Øekland and K. Oyama and H. Park and J. Park and I. Pascal and T. Peitzmann and M. Protsenko and S. S. Räsänen and F. Rarbi and M. Rauch and A. Rehman and M. Richter and D. Röhrich and K. Røed and A. Rusu and H. Rytkönen and S. Sakai and K. Sato and A. Schilling and S. Shimizu and M. Shimomura and R. Simeonov and E. Solheim and T. Sugitate and G. Tambave and D. Tapia Takaki and D. Tourres and I. Tymchuk and J. Yi and Z. Yin and K. Ullaland and S. Yang and T. Yokoo and D. Zhou and S. Zillien},
journal= {arXiv preprint arXiv:2311.07413},
year = {2024}
}
备注
57 pages (without acronyms), 45 captioned figures