CERN Accelerating science

Article
Report number	physics/0310122
Title	Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15\%)
Related title	PION ELECTRON
Author(s)	Andronic, A. ; Appelshauser, H. ; Blume, C. ; Braun-Munzinger, P. ; Bucher, D. ; Busch, O. ; Catanescu, V. ; Ciobanu, M. ; Daues, H. ; Emschermann, D. ; Fateev, O. ; Foka, Y. ; Garabatos, C. ; Gunji, T. ; Herrmann, N. ; Inuzuka, M. ; Kislov, E. ; Lindenstruth, V. ; Ludolphs, W. ; Mahmoud, T. ; Petracek, V. ; Petrovici, M. ; Rusanov, I. ; Sandoval, A. ; Santo, R. ; Schicker, R. ; Simon, R.S. ; Smykov, L. ; Soltveit, H.K. ; Stachel, J. ; Stelzer, H. ; Tsiledakis, G. ; Vulpescu, B. ; Wessels, J.P. ; Windelband, B. ; Xu, C. ; Zaudtke, O. ; Zanevsky, Yu. ; Yurevich, V.
Affiliation	(Gesellschaft fur Schwerionenforschung, Darmstadt, Germany)
Publication	2004
Imprint	24 Oct 2003
Number of pages	15
Note	15 pages, 10 figures, accepted for publication in Nucl.Instrum.Meth. A Subj-class: Instrumentation and Detectors
In:	Nucl. Instrum. Methods Phys. Res., A 519 (2004) 508-17
DOI	10.1016/j.nima.2003.11.036
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	We present measurements of the energy loss of pions and electrons in drift chambers operated with a Xe,CO2(15%) mixture. The measurements are carried out for particle momenta from 1 to 6 GeV/c using prototype drift chambers for the ALICE TRD. Microscopic calculations are performed using input parameters calculated with GEANT3. These calculations reproduce well the measured average and most probable values for pions, but a higher Fermi plateau is required in order to reproduce our electron data. The widths of the measured distributions are smaller for data compared to the calculations. The electron/pion identification performance using the energy loss is also presented.

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