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Development of tungsten wire-scintillating fiber sampling calorimeter

钨丝闪烁光纤采样量热仪的研制

基本信息

批准号：
18540302
负责人：
LIM Gei Youb
金额：
$ 2.59万
依托单位：
High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540302/
关键词：
Experimental Particle Physics Electromagnetic calorimeter 検出器

项目摘要

The electromagnetic calorimeter measures incident gamma energy by using electromagnetic shower generated inside detector. Recent partide physics experiments continuously need larger and denser calorimeter in order to detect higher energy gamma. We tried to make a new sampling calorimeter using tungsten wire to shorten radiation length and scintillating fiber to increase collection efficiency of the scintillation light. It is an attractive feature that this fiber sampling calorimeter enables us to optimize radiation length (size of calorimeter) and visible ratio for particular experiment.The electromagnetic calorimeter measures incident gamma energy by using electromagnetic shower generated inside detector. Recent partide physics experiments continuously need larger and denser calorimeter in order to detect higher energy gamma. We tried to make a new sampling calorimeter using tungsten wire to shorten radiation length and scintillating fiber to increase collection efficiency of the scintillation light. It is an attractive feature that this fiber sampling calorimeter enables us to optimize radiation length (size of calorimeter) and visible ratio for particular experiment.In FY2007, we performed test the module by using positron beam at the Laboratory of Nuclear Science, Tohoku University. With the positrons in energy range of 200MeV to 800MeV, we recorded its energy deposit to the test module with the flash ADC module. The energy dependency of resolution is well expressed by commonly used function and 13% of energy for 1GeV gamma was obtained.

电磁量能器是利用探测器内部产生的电磁簇射来测量入射γ能量的。近年来的粒子物理实验不断需要更大、更高密度的量热计来探测更高能量的γ射线。我们尝试用钨丝缩短辐射长度，用光纤提高闪烁光的收集效率，制成一种新的取样量热计。这种光纤取样量热计的一个吸引人的特点是使我们能够为特定的实验优化辐射长度（量热计的尺寸）和可见光比。电磁量热计利用探测器内部产生的电磁簇射来测量入射γ能量。近年来的粒子物理实验不断需要更大、更高密度的量热计来探测更高能量的γ射线。我们尝试使用钨丝来缩短辐射长度并使用闪烁纤维来提高闪烁光的收集效率来制作一种新的采样热量计。这种光纤取样量热计的优点是，可以根据特定的实验优化辐射长度（量热计的尺寸）和可见光比。2007年度，在东北大学原子核科学研究室，使用正电子束对该模块进行了测试。利用200 MeV ~ 800 MeV能量范围内的正电子，利用Flash ADC模块记录其能量存款到测试模块。用常用的函数很好地表达了分辨率的能量依赖性，得到了1GeV γ射线能量的13%。