Performance of the AMS-02 transition radiation detector

✍ Scribed by Ph.v. Doetinchem; S. Fopp; W. Karpinski; Th. Kirn; K. Lübelsmeyer; J. Orboeck; S. Schael; A. Schultz von Dratzig; G. Schwering; Th. Siedenburg; R. Siedling; W. Wallraff; U. Becker; J. Burger; R. Henning; A. Kounine; V. Koutsenko; J. Wyatt

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 565 KB
• Volume: 558
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.12.187

✦ Synopsis

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/CO 2 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.