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ATLAS Italia Roma 28 novembre 2008 In preparazione della riunione di CSN1 24-26 novembre 2008

Updates on the shutdown schedule for Calorimeter LAR at ATLAS, including weekly activities, LVPS refurbishing, FEBS issues, and planned tests on new OTX. Activities in Milan also detailed.

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ATLAS Italia Roma 28 novembre 2008 In preparazione della riunione di CSN1 24-26 novembre 2008

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  1. ATLAS Italia Roma 28 novembre 2008 In preparazione della riunione di CSN1 24-26 novembre 2008 Calorimetro LAR

  2. Shutdown schedule L.Hervas LAr Weekly 3.11.2008 2

  3. Shutdown schedule A Side C Side • End March (we will see further on) Rumors are in the corridor Started. ECTA on truck https://edms.cern.ch/file/305624/8/shut_down__6oct08.pdf L.Hervas LAr Weekly 3.11.2008 3

  4. Since the breakdown of the LHC , ATLAS has collected cosmic muons data until 27.10.2008. LAr ,Tiles& L1Calo continued to collect data until 10.11.2008. The Atlas detector is presently being open , starting with the A side Access this week to EC-A and barrel side A First week december access to EC-C and barrel side C LAR Calorimeter now off until february 2009 • Weekly schedule during shutdown period: • Mondays: TDAQ tests using our ROSes • Tuesdays: LAr & LVL1Calo calibration runs • Wednesdays and Fridays: Calibration runs • Wednesdays and Fridays afternoon, and Thursdays: LAr DAQ developments and tests • One on call shifter for taking calibration runs

  5. Three serious problems • LVPS refurbishing • Have 8 running (2 at CERN, 5 ALGEN, 1 BNL) since ~3 weeks (refurbishing done) • Go ahead with refurbishing 8 more taken from ECA asap • Decide in November LAr week if to do the full Refurbishing #2 campaign LVPS backup solution • Planned #2 FDR of AA backup plan 3rd December @ BNL (to review the follow up of the #1, #1 FDR of Wiener still in Jan 09 • FEBS • Lost some FEBs by now (no light) • Still belief that OTX is most probable cause • Plan for preparing new OTXs “from Scratch” • In any event it is incompatible with addressing all FEBS with current shutdown duration • Waiting for confirmation of problem (access !) • Then agree on a design and plan. • Plan radiation and accelerated stress tests onnew OTX • HEC LVPS breakdown (the unit will be accessible by end of November)

  6. Attivita’ di Milano • Preamplificatori test su ibridi per Sono stati osservati” burst noise” su 1° /°°dei canali di PA • E’ stato rimontato a Milano il banco banco di test, test fatto su un solo ibrido disponibile (prima dell’accesso al Calorimetro). Si dovranno sostituire gli ibridi anomali (osservato uno “pseudo corto” sulla linea 3v) • HV E’ in corso lavoro sulla nuova versione OPC server ( SW ISEG di comunicazione con i moduli HV) da utilizzare nel programma di controllo HV che si vorrebbe installare entro inizio 2009 • In progresso la preparazione configuration data base • Calibrazione elettroni/gamma lavoro sui gamma che convertono, e’ in preparazione il codice da inserire in ATHENA il lavoro continuera’ nei prossimi mesi (2009) utilizzando nuova geometria , nuove generazioni MC.

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