发表机构
Tata Institute of Fundamental Research; Institute of Nuclear Physics, Polish Academy of Sciences（塔塔基础研究所; 波兰科学院核物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用小型ICAL原型在17 GV地磁截止处测量与电荷相关的大气μ子通量，测量了μ⁻和μ⁺ 在1 - 5 GeV/c动量范围的微分通量，验证了探测器性能等，结果与模型预测比较。
AI 中文摘要
印度中微子观测站（INO）的铁量能器（ICAL）探测器旨在测量大气中微子振荡参数。作为研发计划的一部分，在马杜赖的IICHEP过境校区建造了一个85吨的小型ICAL原型，约为全探测器质量的1/600。该原型在2018年至2022年运行，测量了地磁赤道附近与电荷相关的宇宙μ子谱，验证了探测器性能、重建算法和模拟框架。测量了μ⁻和μ⁺ 在1 - 5 GeV/c动量范围内的微分通量，结果与不同强子相互作用模型的预测进行了比较。
英文摘要
The Iron CALorimeter (ICAL) detector at the India-Based Neutrino Observatory (INO) was conceived as an underground experiment designed to measure atmospheric neutrino oscillation parameters. As part of the R\&D programme, a scaled prototype (mini-ICAL), 85\,ton, approximately 1/600$^{\mathrm{th}}$ the mass of the full detector, was constructed at the IICHEP Transit Campus, Madurai (altitude 150\,m; latitude 9.9372$^\circ$\,N; longitude 78.013$^\circ$\,E; geomagnetic latitude 1.44$^\circ$\,N; vertical cutoff rigidity 17\,GV) and operated between 2018 and 2022. The prototype enabled measurements of charge-dependent cosmic muon spectra in the vicinity of the geomagnetic equator and provided an important validation of detector performance, reconstruction algorithms, and simulation frameworks for the ICAL experiment. Differential fluxes of $μ^{-}$ and $μ^{+}$ were measured over the momentum range $\sim$\,1--5\,GeV/c. The obtained momentum spectra are systematically lower than those reported at sites with smaller geomagnetic cutoff rigidities, consistent with the suppression of low- and intermediate-rigidity primary cosmic rays at the 17\,GV cutoff. The measurements are compared with predictions from different hadronic interaction models available in CORSIKA simulations.
CommentsUpdated version 26 pages, 18 figures, 2 tables
