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

S. Acharya , Łukasz Graczykowski , Monika Jakubowska , Małgorzata Janik , Adam Kisiel , Julian Myrcha , Jeremi Niedziela , Janusz Oleniacz , Jan Pluta , Przemysław Rokita , Hanna Zbroszczyk

Abstract

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.
Collective authorALICE Collaboration
Author S. Acharya
S. Acharya,,
-
, Łukasz Graczykowski ZFJ
Łukasz Graczykowski,,
- Nuclear Physics Division
, Monika Jakubowska ISEP
Monika Jakubowska,,
- The Institute of Control and Industrial Electronics
, Małgorzata Janik ZFJ
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel ZFJ
Adam Kisiel,,
- Nuclear Physics Division
, Julian Myrcha II
Julian Myrcha,,
- The Institute of Computer Science
, Jeremi Niedziela ZFJ
Jeremi Niedziela,,
- Nuclear Physics Division
, Janusz Oleniacz ZFJ
Janusz Oleniacz,,
- Nuclear Physics Division
, Jan Pluta ZFJ
Jan Pluta,,
- Nuclear Physics Division
, Przemysław Rokita II
Przemysław Rokita,,
- The Institute of Computer Science
et al.
Total number of authors1131
Journal seriesNuclear Instruments & Methods in Physics Research Section A Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002
Issue year2018
Vol881
Pages88-127
Publication size in sheets1.95
Keywords in EnglishTransition radiation detector; Multi-wire proportional drift chamber; Fibre/foam sandwich radiator; Xenon-based gas mixture; Tracking; Ionisation energy loss; dE/dx; TR; Electron-pion identification; Neural network; Trigger
DOIDOI:10.1016/j.nima.2017.09.028
URL http://www.sciencedirect.com/science/article/pii/S0168900217309981?via%3Dihub
Languageen angielski
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1-s2.0-S0168900217309981-main.pdf (file archived - login or check accessibility on faculty) 1-s2.0-S0168900217309981-main.pdf 5.05 MB
Score (nominal)25
ScoreMinisterial score = 20.0, 12-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 12-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.362 (2) - 2016=1.211 (5)
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