Study on the light output non-uniformity of PbWO4 crystal

被引：0

作者：

Shao, M ^{[1
]}

Xu, T

Liu, MC

Wang, CR

Ruan, LJ

Chen, HF

Pan, XH

Wang, CZ

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[2] Hefei Univ Technol, Coll Mech & Auto Engn, Hefei 230009, Peoples R China

来源：

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION | 2001年 / 25卷 / 06期

关键词：

lead-tungstate crystal; scintillator; non-uniformity; Na-22; source; surface roughness;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

This paper presents the measurement on the light output non-uniformity of full size PbWO4 crystal, which will be used in the electromagnetic calorimeter (ECAL) of CMS detector. It makes use of the Na-22 radiactive source and the coincident method. With the help of convolution fitting method, it is possible to make fine measurement on the light output non-uniformity of the crystal. The effect of depolishing one of the lateral faces of the crystal on the non-uniformity has been studied. The slope of the non-uniformity curve decreases with the increasing of the roughness. When the roughness reaches R-x = (1.49 +/- 0.27) mum the non-uniformity curve meets the requirement of CMS-ECAL.

引用

页码：555 / 560

页数：6