ATLAS liquid argon calorimeter back end electronics

J. Bán , A. Bazan (1) , F. Bellachia (1) , A. Blondel , S. Böttcher , A. Clark , J. Colas (1) , M. Díaz-Gómez , B. Dinkespiler (2) , I. Efthymiopoulos , M. Escalier (3) , L. Fayard (4) , A. Gara , Y. He , F. Henry-Couannier (2) , F. Hubaut (3) , G. Ionescu (1) , A. Karev , L. Kurchaninov , R. Lafaye (1) , B. Laforge (3) , D. La Marra , S. Laplace (1) , O. Le Dortz (3) , A. Léger , T. Liu , D. Martin (3) , P. Matricon (4) , L. Moneta , E. Monnier (2) , H. Oberlack , J.A. Parsons , S. Pernecker , G. Perrot (1) , L. Poggioli (4) , J. Prast (1) , H. Przysiezniak (1) , B. Repetti , I. Riu , L. Rosselet , P. Schwemling (3) , S. Simion (4) , W. Sippach , A. Strässner , R. Stroynowski , S. Tisserant (2) , G. Unal (4) , H. Wilkens (5) , I. Wingerter-Seez (1) , A. Xiang , J. Yang , J. Ye

1 LAPP - Laboratoire d'Annecy de Physique des Particules
2 CPPM - Centre de Physique des Particules de Marseille
3 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
4 LAL - Laboratoire de l'Accélérateur Linéaire
5 CERN - European Organization for Nuclear Research

The Liquid Argon calorimeters play a central role in the ATLAS (A Toroidal LHC Apparatus) experiment. The environment at the Large Hadron Collider (LHC) imposes strong constraints on the detectors readout systems. In order to achieve very high precision measurements, the detector signals are processed at various stages before reaching the Data Acquisition system (DAQ). Signals from the calorimeter cells are received by on-detector Front End Boards (FEB), which sample the incoming pulse every 25ns and digitize it at a trigger rate of up to 75~kHz. Off-detector Read Out Driver (ROD) boards further process the data and send reconstructed quantities to the DAQ while also monitoring the data quality. In this paper, the ATLAS Liquid Argon electronics chain is described first, followed by a detailed description of the off-detector readout system. Finally, the tests performed on the system are summarized.

Mots clés: LHC; ATLAS; Liquid argon calorimeter; Back end electronics

Domaines: Instrumentations et Détecteurs [physics.ins-det]

J. Bán, A. Bazan, F. Bellachia, A. Blondel, S. Böttcher, et al.. ATLAS liquid argon calorimeter back end electronics. Journal of Instrumentation, 2007, 2, pp.06002. ⟨10.1088/1748-0221/2/06/P06002⟩. ⟨in2p3-00142571⟩