欧洲核子中心的大型强子对撞机探测器预计工作在1034/(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20 keV到1.8 MeV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 1034/(cm2*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.
参考文献
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