The CDF Cherenkov luminosity monitor

Citation
D. Acosta et al., The CDF Cherenkov luminosity monitor, NUCL INST A, 461(1-3), 2001, pp. 540-544
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
461
Issue
1-3
Year of publication
2001
Pages
540 - 544
Database
ISI
SICI code
0168-9002(20010401)461:1-3<540:TCCLM>2.0.ZU;2-0
Abstract
We have built a novel device for precision measurements of luminosity in th e CDF experiment at the high p(p) over bar collision rates expected during Run II. The detector consists of long, conical, gaseous Cherenkov counters that point to the collision region and monitor the average number of inelas tic p(p) over bar interactions by measuring the number of particles, and th eir arrival time, in each bunch crossing. For these primary particles, usin g isobutane at atmospheric pressure as a radiator, a large amount of Cheren kov light (similar to 100 photoelectrons) will be collected, with good ampl itude and time resolutions, onto small and efficient PMTs. Suitable amplitu de thresholds will be applied to discriminate from non-primary particles an d other backgrounds which yield little light in the counters. This detector is expected to reliably perform bunch-by-bunch luminosity measurements at peak instantaneous luminosities of 2 x 10(32) cm(-2) s(-1) with six interac tions per bunch crossing, on average, and respond to a 132 ns bunch spacing . (C) 2001 Elsevier Science B.V. All rights reserved.