Aging of large-area CsI photocathodes for the ALICE HMPID prototypes

被引：15

作者：

Braem, A

Davenport, M

Di Mauro, A ^{[1
]}

Martinengo, P

Nappi, E

Paic, G

Piuz, F

Schyns, É

机构：

[1] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[2] Ist Nazl Fis Nucl, Sez Bari, Bari, Italy

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 515卷 / 1-2期

关键词：

CsI; photocathode aging; RICH;

D O I：

10.1016/j.nima.2003.09.015

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The ALICE High-Momentum Particle IDentification RICH detector is equipped with CsI photocathodes (PCs) in a MWPC for the detection of Cherenkov photons. The long-term operational experience with large-area CsI PCs is described. The RICH prototypes have shown a very high stability of operation and performance at a gain of 10(5) and with rates up to 2 x 10(4) cm(-2) s(-1). When exposure to air is avoided, no degradation of the CsI quantum efficiency has been observed on PCs periodically exposed to test beams over 7 years, corresponding to local integrated charge densities of similar to1 mC/cm(2). The results of limited exposures to oxygen and humidity are also presented. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：307 / 312

页数：6

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