Experimental Study of Lead Tungstate Scintillator Proton-Induced Damage and Recovery

被引：13

作者：

Auffray, E. ^{[1
]}

Korjik, M.

Singovski, A. ^{[2
]}

机构：

[1] CERN, CH-1211 Geneva 23, Switzerland

[2] Univ Minnesota, Minneapolis, MN 55455 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2012年 / 59卷 / 05期

基金：

英国科学技术设施理事会;

关键词：

Optical bleaching; PWO; radiation damage; HIGH-ENERGY PROTON; OPTICAL-TRANSMISSION; CRYSTALS;

D O I：

10.1109/TNS.2012.2197416

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Lead tungstate (PbWO4, or PWO) scintillating crystals are used by two of the four experiments at the Large Hadron Collider (LHC): 75848 in CMS and 17920 in ALICE. For the CMS electromagnetic calorimeter, one of the most important crystal properties is its radiation hardness. With the increase of luminosity, the radiation level will increase drastically, particularly in the high pseudorapidity regions of the calorimeter. Beside the effects of color-centre formation caused by gamma-radiation, additional measurable effect originated by hadron irradiation could appear, which will further deteriorate the optical transmission of the crystals and therefore their efficiency. In this paper, we will present results of the proton-induced damage in PWO and a study of optical transmission recovery at different temperatures and under different light-induced "bleaching" conditions for proton-irradiated crystals.

引用

页码：2219 / 2223

页数：5

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