Cross-calibration of two automatic quality control systems for the CMS ECAL crystals

被引：4
作者：
Auffray, E
Bouquerel, E
Chevenier, G
Lecoq, P
Perez-Prado, L
Sempere-Roldan, P
Schneegans, M
Cavallari, F
Costantini, S
Dafinei, I
Diemoz, M
Longo, E
Meridiani, P
Organtini, G
Paramatti, R
Baccaro, S
Montecchi, M
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] CERN, Geneva, Switzerland
[3] LAPP, Annecy Le Vieux, France
[4] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy
[5] ENEA Casaccia, Rome, Italy
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 523卷 / 03期
关键词：
calibration; electromagnetic calorimeter; scintillating crystals; optical properties; measurement automation;
D O I：
10.1016/j.nima.2003.11.431
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The barrel part of the CMS electromagnetic calorimeter consists of about 75 000 Lead Tungstate (PbWO4) crystals arranged in 36 x 4 modules which are assembled in two Regional Centres, in Rome and at CERN. Two automatic machines have been designed to check the crystal quality before assembly. The main crystal characteristics are compared to a set of specifications included in the contract with the crystal producers. The measurement stability and cross-calibration between the two machines is a fundamental issue, which has to be monitored throughout the construction phase. This paper describes comparisons between measurements made at the two regional centres to ensure a consistent and reliable crystal quality control. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：355 / 364
页数：10
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