TGC测器的γ灵敏度测量  

Measurement of γ ray Sensitivity of Thin Gap Chamber

作　　者：叶邦角[1,2] S.Tsuno T.Kobayashi 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026 [2]东京大学国际基本粒子物理研究中心,日本东京113

出　　处：《原子核物理评论》2001年第2期96-100,共5页Nuclear Physics Review

摘　　要：欧洲核子中心的大型强子对撞机探测器预计工作在 1 0 34 /(cm2·s)亮度 ,这将导致实验大厅的本底非常严重 .薄气隙室将作为 ATLAS实验中的前端 μ子触发器 .按照模拟计算 ,实验大厅薄气隙室周围的主要本底是中子和光子 .报告了薄气隙室探测器的 γ灵敏度的实验测量 .使用 γ能量从 2 0 ke V到 1 .8Me V的放射性 γ源 .目前测量的灵敏度小于 1 % ,与用 EGS4模拟计算结果相吻合 .The Large Hadron Collider (LHC) at the European Laboratory for Particle Physics (CERN) is expected to operate at the luminosity of 10 34 /(cm 2 ·s), and the resulting background condition in the experimental hall would be quit severe. Thin Gap Chamber (TGC) will be used for forward muon triggering in the ATLAS experiment. According to a simulation, the main source of the background around TGC in the experimental hall is neutrons and photons. The sensitivity measurement for TGC to γ rays is described. The measurement was performed for γ ray energies between 20 keV and 1.8 MeV. The sensitivity was found to be less than 1%, and it shows good agreement with the simulation based on EGS4.

关 键 词：薄气隙室 ATLAS谱仪 Γ灵敏度 TGC探测器 对撞机 

分 类 号：O572.2[理学—粒子物理与原子核物理]