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

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

doi:10.1088/1748-0221/17/05/p05024

Abstract

The Phase-I trigger readout electronics upgrade of the ATLAS Liquid Argon calorimeters enhances thephysics reach of the experiment during the upcoming operation atincreasing 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 tenas well as its precision and range.Consequently, the background rejection at trigger level is improvedthrough enhanced filtering algorithms utilizing the additional informationfor topological discrimination of electromagnetic and hadronic shower shapes.This paper presents the final designs of the new electronic elements,their custom electronic devices, the proceduresused to validate their proper functioning, and the performance achievedduring the commissioning of this system.

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