Development of electro-magnetic calorimeter for photon measurements in ultra-relativistic hadron collisions

研制了一种跟踪式电磁量热计样机，并对其进行了优化，用于测量欧洲核子研究中心（CERN）大型强子对撞机p-p和p-A碰撞的正快区单光子和中性介子，以研究小x区胶子分布函数。设计并制作了用于读取硅传感器信号的ASIC芯片。在CERN PS上使用二次光束对探测器原型进行了测试，并对其性能进行了评估。

A prototype of tracking electro-magnetic calorimeter was developed, which is optimized to measure single photons and neutral pions at forward rapidity region in p-p and p-A collisions at CERN LHC with purpose of investigating gluon distribution function at small x region. An ASIC chip for reading signals from Si sensor was designed and fabricated. The detector prototype was tested using the secondary beams at CERN PS and performances were evaluated.