Study of Scintillation Fiber Calorimeter for High Energy Particles

闪烁光纤量热计（SFCAL）是一种量热计，作为未来几年高能物理实验的探测器之一，特别是在多TeV强子对撞机（如SSC或LHC）上的探测器，引起了人们的兴趣。我们正在研制塑料闪烁光纤和光纤量热计的读出系统。我们所研究的量热器模块长2.3m，由1 mm的PHI闪烁纤维和铅制成。闪烁纤维与铅的体积比为1：4。模块前端和后端的横截面为4 x 4 cm和8 X 8 cm。在后端突出的纤维被捆绑，以保持纤维在前端的顺序。将成束的纤维镜面抛光并连接到多阳极光电倍增管（MAPMT），Hamamatsu H4484。该MAPMT有64个阳极，它使我们能够研究材料中簇射发展的特征。我们做了九个模块，它们被组装在一个3x 3的矩阵中，形成一个l ...更多信息 更大的热量计模块。它总共重约900公斤。在欧洲核子研究中心研究这个用于高能束的模块之前，我们在TRISTAN积累环上产生的几个GeV电子束上对它进行了初步的试验，试验内容如下：1）FADC处理输出脉冲; 2）输出信号的能量依赖性; 3）簇射在组件中的扩展与能量的依赖性; 4）闪烁光在组件中的衰减; 5）输出脉冲在阳极之间的干扰6）量热计模块之间的能量泄漏7）输出脉冲对模块机械应力的依赖性8）输出脉冲对入射光束角的依赖性9）输出脉冲的长期稳定性目前对结果进行了仔细的分析。我们证实，模块中的光衰减主要取决于用于组装光纤和铅的胶水。它是由CERN的合作者首先发现的。这一事实将使我们在下一步的尝试中重新考虑热量计模块的制造方式。少

Scintillation Fiber Calorimeter (SFCAL) is a calorimeter which has attracted interests as one of the detectors to be developed for high energy physics experiments in the coming years, especially at the multi-TeV hadron colliders such as SSC or LHC. We have been developing plastic scintillation fibers and a readout system of fiber calorimeter. A calorimeter module which we have been studying is 2.3 m long made of 1mm PHI scintillation fibers and lead. The proportion of scintillation fiber and lead is 1 to 4 in volume. The cross sections of the front and rear ends of the module are 4 x 4 cm and 8 X 8 cm. Protruding fibers at the rear end are bundled keeping the order of fibers in the lead. Bundled fibers are mirror-polished and connected to a multi-anode photomultiplier (MAPMT), Hamamatsu H4484. This MAPMT has 64 anodes and it makes it possible for us to study the features of the shower development in the material. We make nine modules and they are assembled in a 3 x 3 matrix forming a l … More arger calorimeter module. It weighs about 900Kg in total.Before studying this module for the high energy beam at CERN, we made a preliminary test of it on a few GeV electron beams produced at the TRISTAN Accumulation Ring for the following items.1) Treatment of output pulses with FADC2) Energy dependence of output signal3) Spread of shower in the module at its energy dependence4) Attenuation of the scintillation light in the module5) Interference of output pulse among the anodes6) Energy leakage between calorimeter modules7) Dependence of output pulse on the mechanical stress to the module8) Dependence of the output pulse on the incident beam angle9) Long term stability of the output pulseThe results are currently analyzed carefully. We confirmed that the light attenuation in the module depends critically on the glue used to assemble fibers and lead. It was first found by the collaborator at CERN. This fact will make us reconsider the way of fabrication of the calorimeter module in the next attempt. Less