The ALICE Transition Radiation Detector: Construction, operation, and performance

The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in...

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Main Authors: Acharya, Shreyasi, Adam, Jaroslav, Adamová, Dagmar, Adler, Clemens, Adolfsson, Jonatan, Aggarwal, Madan M, Aglieri Rinella, Gianluca, Agnello, Michelangelo, Agrawal, Nikita, Ahammed, Zubayer, Alme, Johan, Altenkaemper, Lucas, Djuvsland, Øystein, Lønne, Per-Ivar, Nystrand, Joakim, Rehman, Attiq ur, Røhrich, Dieter, Tambave, Ganesh Jagannath, Ullaland, Kjetil, Velure, Arild, Wagner, Boris, Zhang, Hui, Zhou, Zhuo, Zhu, Hongsheng, Arsene, Ionut Christian, Bätzing, Paul Christoph, Dordic, Olja, Lindal, Svein, Lardeux, Antoine Xavier, Mahmood, Sohail Musa, Milosevic, Jovan, Richter, Matthias, Røed, Ketil, Skaali, Toralf Bernhard, Tveter, Trine Spedstad, Wikne, Jon Christopher, Zhao, Chengxin, Helstrup, Håvard, Hetland, Kristin Fanebust, Kileng, Bjarte, Nesbø, Simon Voigt, Storetvedt, Maksim Melnik, Langøy, Rune, Lien, Jørgen, Ahmad, Shafiq F, Ahn, Sang Un, Aiola, Salvatore, Akindinov, Alexander, Al-Turany, Mohammed, Alam, Sk Noor, ALICE, Collaboration
Format: Article
Language:English
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Summary:The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/c� in p–Pb collisions and the resolution at high transverse momentum improves by about 40% when including the TRD information in track reconstruction. The triggering capability is demonstrated both for jet, light nuclei, and electron selection.