Published March 21, 2005 | Version v1
Journal article Metadata-only

Light collection uniformity of lead tungstate crystals for the CMS electromagnetic calorimeter

Creators

  • 1. High Energy Physics, Blackett Laboratory, Imperial College, London, SW7 2BW (United Kingdom)

Description

A technique has been developed to measure the light collection uniformity of lead tungstate crystals for the CMS electromagnetic calorimeter. The use of a hybrid photomultiplier tube allows a precision measurement despite the intrinsically low light yield. It is found that shading the chamfered edges of the crystals with a pencil can achieve a reduction in the front-non-uniformity of approximately 0.1%/X0. Similar effects are observed by de-polishing the chamfers

Additional details

Identifiers

DOI
10.1016/j.nima.2004.11.038;
PII
S0168-9002(04)02428-3;

Publishing Information

Journal Title
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Journal Volume
540
Journal Issue
2-3
Journal Page Range
p. 273-284
ISSN
0168-9002
CODEN
NIMAER

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37033513
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
ACCURACY; CALORIMETERS; CRYSTALS; LEAD TUNGSTATES; PHOTOMULTIPLIERS; POLISHING; VISIBLE RADIATION
Descriptors DEC
ELECTROMAGNETIC RADIATION; LEAD COMPOUNDS; MEASURING INSTRUMENTS; OXYGEN COMPOUNDS; PHOTOTUBES; RADIATIONS; REFRACTORY METAL COMPOUNDS; SURFACE FINISHING; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS

Optional Information

Copyright
Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.