A QUALITATIVE METHOD TO DETERMINE THE LOSS OF EFFICIENCY IN THE DELPHI BARREL RICH MWPCS DUE TO AGING

Authors
VANAPELDOORN G BOURDARIOS C DAVENPORT M DRACOS M JUILLOT P KJAER N TOET DZ TSIROU A
Citation
G. Vanapeldoorn et al., A QUALITATIVE METHOD TO DETERMINE THE LOSS OF EFFICIENCY IN THE DELPHI BARREL RICH MWPCS DUE TO AGING, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 348(2-3), 1994, pp. 249-251
Citations number
15
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
348
Issue
2-3
Year of publication
1994
Pages
249 - 251
Database
ISI
SICI code
0168-9002(1994)348:2-3<249:AQMTDT>2.0.ZU;2-7
Abstract
We describe a simple method to survey effects of ageing in the multiwi re proportional chambers of the DELPHI Barrel Ring Imaging CHerenkov ( RICH) counters. These chambers detect single photoelectrons created by Cherenkov light in a photosensitive gas mixture. They receive as well the much larger amount of ionisation electrons created by the charged particles. The method essentially consists of a comparison of the pla teau curves measured after each year's running period in order to dete ct changes in their characteristics as a function of exposure.