The Phase-I trigger readout electronics upgrade of the ATLAS Liquid Argon calorimeters

G. Aad, A. V. Akimov, K. Al Khoury, M. Aleksa, T. Andeen, C. Anelli, N. Aranzabal, C. Armijo, A. Bagulia, J. Ban, T. Barillari, F. Bellachia, M. Benoit, F. Bernon, A. Berthold, H. Bervas, D. Besin, A. Betti, Y. Bianga, M. BiautD. Boline, J. Boudreau, T. Bouedo, N. Braam, M. Cano Bret, G. Brooijmans, H. Cai, C. Camincher, A. Camplani, S. Cap, A. Carbone, J. W.S. Carter, S. V. Chekulaev, H. Chen, K. Chen, N. Chevillot, M. Citterio, B. Cleland, M. Constable, S. De Jong, A. M. Deiana, M. Delmastro, B. Deng, H. Deschamps, C. Diaconu, A. Dik, B. Dinkespiler, N. Dumont Dayot, A. Emerman, Y. Enari, P. J. Falke, J. Farrell, W. Fielitz, E. Fortin, J. Fragnaud, S. Franchino, L. Gantel, K. Gigliotti, D. Gong, A. Grabas, P. Grohs, N. Guettouche, T. Guillemin, D. Guo, J. Guo, L. Hasley, C. Hayes, R. Hentges, L. Hervas, M. Hils, J. Hobbs, A. Hoffman, D. Hoffmann, P. Horn, T. Hryn'Ova, L. Iconomidou-Fayard, R. Iguchi, T. James, J. Ye, K. Johns, T. Junkermann, C. Kahra, E. F. Kay, R. Keeler, S. Ketabchi Haghighat, P. Kinget, E. Knoops, A. Kolbasin, P. Krieger, J. Kuppambatti, L. L. Kurchaninov, E. Ladygin, S. Lafrasse, M. P.J. Landon, F. Lanni, S. Latorre, D. Laugier, M. Lazzaroni, X. Le, P. Le Bourlout, C. A. Lee, M. Lefebvre, M. A.L. Leite, C. Leroy, X. Li, Z. Li, F. Liang, H. Liu, C. Liu, T. Liu, H. Ma, L. L. Ma, D. J. Mahon, U. Mallik, B. Mansoulie, A. L. Maslennikov, N. Matsuzawa, R. A. McPherson, S. Menke, A. Milic, Y. Minami, E. Molina, E. Monnier, N. Morange, L. Morvaj, J. Mueller, C. Mwewa, R. Narayan, N. Nikiforou, I. Ochoa, R. Oishi, D. Oliveira Damazio, R. E. Owen, C. Pancake, D. K. Panchal, G. Perrot, M. A. Pleier, P. Poffenberger, R. Porter, S. Quan, J. Rabel, A. Roy, J. P. Rutherfoord, F. Sabatini, F. Salomon, E. Sauvan, A. C. Schaffer, R. D. Schamberger, Ph Schwemling, C. Secord, L. Selem, K. Sexton, E. Shafto, M. V. Silva Oliveira, S. Simion, S. Singh, W. Sippach, A. A. Snesarev, S. Snyder, M. Spalla, S. Stärz, A. Straessner, P. Strizenec, R. Stroynowski, V. V. Sulin, J. Tanaka, S. Tang, S. Tapprogge, G. F. Tartarelli, G. Tateno, K. Terashi, S. Tisserant, D. Tompkins, G. Unal, M. Unal, K. Uno, A. Vallier, S. Vieira De Souza, R. Walker, Q. Wang, C. Wang, R. Wang, M. Wessels, I. Wingerter-Seez, K. Wolniewicz, W. Wu, Z. Xiandong, R. Xu, H. Xu, S. Yamamoto, Y. Yang, H. Zaghia, J. Zang, T. Zhang, H. L. Zhu, V. Zhulanov, E. Zonca, G. Zuk

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The Phase-I trigger readout electronics upgrade of the ATLAS Liquid Argon calorimeters enhances the physics reach of the experiment during the upcoming operation at increasing Large Hadron Collider luminosities. The new system, installed during the second Large Hadron Collider Long Shutdown, increases the trigger readout granularity by up to a factor of ten as well as its precision and range. Consequently, the background rejection at trigger level is improved through enhanced filtering algorithms utilizing the additional information for topological discrimination of electromagnetic and hadronic shower shapes. This paper presents the final designs of the new electronic elements, their custom electronic devices, the procedures used to validate their proper functioning, and the performance achieved during the commissioning of this system.

Original languageEnglish (US)
Article numberP05024
JournalJournal of Instrumentation
Issue number5
StatePublished - May 1 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 CERN.


  • Calorimeters
  • Electronic detector readout concepts (gas, liquid)
  • Front-end electronics for detector readout
  • Radiation-hard electronics


Dive into the research topics of 'The Phase-I trigger readout electronics upgrade of the ATLAS Liquid Argon calorimeters'. Together they form a unique fingerprint.

Cite this