CONSTRUCTION AND BEAM TEST-RESULTS FOR THE DELPHI 2 METER STRAW DETECTOR

Authors
BRAND C BUZZI C FOETH H HESSING TL REID D HAJDUK Z MICHALOWSKI J BOOTH PSL BOWCOCK TJV GALLONI A LAST I MCNULTY R THORNHILL J
Citation
C. Brand et al., CONSTRUCTION AND BEAM TEST-RESULTS FOR THE DELPHI 2 METER STRAW DETECTOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 367(1-3), 1995, pp. 129-132
Citations number
1
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
367
Issue
1-3
Year of publication
1995
Pages
129 - 132
Database
ISI
SICI code
0168-9002(1995)367:1-3<129:CABTFT>2.0.ZU;2-R
Abstract
A straw tube detector has been built as part of the 1995 upgrade for t he DELPHI experiment at LEP. The detector is cylindrical in design, wi th inner wall and outer wall radii of 25 cm and 30 cm respectively. It consists of 960 straws in 5 layers, with a length of 2.1 m, running a t atmospheric pressure with a 50:50 argon-ethane gas mixture. The effi ciency and spatial resolution arising from the measurement of the drif t time have been measured in a test beam. Preliminary results with a f ull scale prototype and a 2:1 argon-isobutane gas mixture at a gain of 2 x 10(4) give a coordinate resolution of 99 mu m per straw, a resolu tion for a track element in the detector of 49 mu m and an efficiency per straw of more than 99%.