CERN Accelerating science

Article
Report number	astro-ph/0608641
Title	Performance of the AMS-02 Transition Radiation Detector
Author(s)	von Doetinchem, P. (Aachen, Tech. Hochsch.) ; Fopp, S. (Aachen, Tech. Hochsch.) ; Karpinski, W. (Aachen, Tech. Hochsch.) ; Kirn, T. (Aachen, Tech. Hochsch.) ; Luebelsmeyer, K. (Aachen, Tech. Hochsch.) ; Orboeck, J. (Aachen, Tech. Hochsch.) ; Schael, S. (Aachen, Tech. Hochsch.) ; Schultz von Dratzig, A. (Aachen, Tech. Hochsch.) ; Schwering, G. (Aachen, Tech. Hochsch.) ; Siedenburg, T. (Aachen, Tech. Hochsch.) ; Siedling, R. (Aachen, Tech. Hochsch.) ; Wallraff, W. (Aachen, Tech. Hochsch.) ; Becker, U. (MIT, LNS) ; Burger, J. (MIT, LNS) ; Henning, R. (MIT, LNS) ; Kounine, A. (MIT, LNS) ; Koutsenko, V. (MIT, LNS) ; Wyatt, J. (MIT, LNS)
Affiliation	(I. Phys. Inst. RWTH-Aachen,) ; (MIT LNS)
Publication	2006
Imprint	29 Aug 2006
Number of pages	11
In:	Nucl. Instrum. Methods Phys. Res., A 558 (2006) 526-535
DOI	10.1016/J.NIMA.2005.12.187
Subject category	Astrophysics and Astronomy
Accelerator/Facility, Experiment	CERN SPS
Abstract	For cosmic particle spectroscopy on the International Space Station the AMS experiment will be equipped with a Transition Radiation Detector (TRD) to improve particle identification. The TRD has 20 layers of fleece radiator with Xe/CO2 proportional mode straw tube chambers. They are supported in a conically shaped octagon structure made of CFC-Al-honeycomb. For low power consumption VA analog multiplexers are used as front-end readout. A 20 layer prototype built from final design components has achieved proton rejections from 100 to 2000 at 90% electron efficiency for proton beam energies up to 250 GeV with cluster counting, likelihood and neural net selection algorithms.

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