Space charge in drift chambers operated with the Xe, CO2(15%) mixture
1.
SYSNO ASEP
0105626
Document Type
J - Journal Article
R&D Document Type
Journal Article
Subsidiary J
Ostatní články
Title
Space charge in drift chambers operated with the Xe, CO2(15%) mixture
Title
Prostorový náboj v driftových komorách pracující se směsí Xe, CO2(15%)
Author(s)
Adronic, A. (DE) Appelshäuser, H. (DE) Blume, C. (DE) Braun-Munzinger, P. (DE) Bucher, D. (DE) Petráček, Vojtěch (UJF-V)
Source Title
Nuclear Instruments & Methods in Physics Research Section A. - : Elsevier
- ISSN 0168-9002
Roč. 525, č. 3 (2004), s. 447-457
Number of pages
8 s.
Language
eng - English
Country
NL - Netherlands
Keywords
drift chambers ; pulse height measurements
Subject RIV
BG - Nuclear, Atomic and Molecular Physics, Colliders
R&D Projects
KSK1048102 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
Annotation
Using prototype modules of the ALICE Transition Radiation Detector (TRD) we investigate space-charge effects and the dependence of the pion rejection performance on the incident angle of the ionizing particle. The average pulse height distributions in the drift chambers operated with the Xe, CO2(15%) mixture provide quantitative information on the gas gain reduction due to space charge accumulating during the drift of the primary ionization. Our results demonstrate that the pion rejection performance of a TRD is better for tracks which are not at normal incidence to the anode wires. We present detailed simulations of detector signals, which reproduce the measurements and lend strong support to our interpretation of the measurements in terms of space-charge effects.
