论文标题
用钨吸收剂和石榴石晶体纤维的意大利面条量热计原型的性能
Performance of a spaghetti calorimeter prototype with tungsten absorber and garnet crystal fibres
论文作者
论文摘要
组装了带有闪烁的晶体纤维的意大利面条量热计（Spacal）原型，并用1到5 GEV的电子束进行了测试。该原型包含辐射硬质量的GD $ _3 $ al $ _2 $ _2 $ ga $ _3 $ _3 $ o $ $ _ {12} $（gagg：ce）和y $ _3 $ _3 $ al $ _5 $ _5 $ o $ $ _ {12} $（yag：yag：ce）固定在纯Tungsten pungsten praberber中。根据梁的入口角度研究了能量分辨率，并发现与LHCB Shashlik技术一致的订单为$ 10 \％ / \ sqrt {e} \ oplus1 \％$。用金属通道点的光电峰与纤维接触或通过光导向耦合，测量时间分辨率的时间分辨率，并测试光带以粘合组件。在5 GEV处，所有能量达到（18.5 $ \ pm $ 0.2）PS的所有能量都达到了几十秒钟的时间分辨率。
A spaghetti calorimeter (SPACAL) prototype with scintillating crystal fibres was assembled and tested with electron beams of energy from 1 to 5 GeV. The prototype comprised radiation-hard Cerium-doped Gd$_3$Al$_2$Ga$_3$O$_{12}$ (GAGG:Ce) and Y$_3$Al$_5$O$_{12}$ (YAG:Ce) embedded in a pure tungsten absorber. The energy resolution was studied as a function of the incidence angle of the beam and found to be of the order of $10\% / \sqrt{E} \oplus1\%$, in line with the LHCb Shashlik technology. The time resolution was measured with metal channel dynodes photomultipliers placed in contact with the fibres or coupled via a light guide, additionally testing an optical tape to glue the components. Time resolution of a few tens of picosecond was achieved for all the energies reaching down to (18.5 $\pm$ 0.2) ps at 5 GeV.
