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Status of r eceivers related activities

Status of r eceivers related activities. Damien Prieur University of Pittsburgh. Receivers Software. Rx Gains - Online Software. Overhaul of L1GainDb & UsbController packages Improved USB communication Database access implemented Larg_L1MON_A & Larg_L1MON_C segments enabled

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Status of r eceivers related activities

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  1. Status of receivers related activities Damien Prieur University of Pittsburgh L1Calo Joint Meeting - Heidelberg

  2. Receivers Software L1Calo Joint Meeting - Heidelberg

  3. Rx Gains - Online Software • Overhaul of L1GainDb & UsbController packages • Improved USB communication • Database access implemented • Larg_L1MON_A & Larg_L1MON_C segments enabled • Right on time before beam ! • Thanks to MurroughL., Fatih B. & Henric W. • Have to be moved out of the LArg segment (Tile/L1Calo calibration runs) • Receivers Strategy • Defines the set of receiver gains to be loaded • Selection through dropdown list in L1Calo panel • Must be set before CONFIG step ! • Controller communication issues • Few USB communication errors observed ~1% • Not critical, have to re-config the concerned segment L1Calo Joint Meeting - Heidelberg

  4. Rx Gains – Database Structure • Oracle INTR server • Store conditions before start of run • Strategy, final gains, DACs & status • Factor folders • 8192 channels/factors per folder • Define Strategies • One strategy = set of factor folders • Selected on L1Calo panel • Gains from different folders are factorized (per channel) L1Calo Joint Meeting - Heidelberg

  5. ET Calibration L1Calo Joint Meeting - Heidelberg

  6. ET Calibration • Gains produced in time for beam • Thanks to Veit Scharf & Antoine Marzin • EMB, EMEC, HEC, Tile • LArg/L1Calo energy scans • Match L1Calo to LArg offline energy • Use calibration OFCs • Corrections for high voltage, dead channels • Correction for disabled FEBs, dead OTX HAD EM 1.5 1.3 1 1 0.7 0.4 L1Calo Joint Meeting - Heidelberg

  7. ET Calibration EM • No calibration for FCAL yet • Technical issues to reconstruct LArg energy • Problematic towers • Few towers with non-optimal calibration • Sick TBB • EMB/EMEC overlap region • All trigger cable installed • Have to determine correct length HAD L1Calo Joint Meeting - Heidelberg

  8. Splashes • Correlation plot from Huaqiao Zhang • 3% bias for EMB and EMEC • To be investigated • TBB delays not appropriate • Set to calibration instead of physics • Few % deviation L1Calo Joint Meeting - Heidelberg

  9. B/EC Overlap Region L1Calo Joint Meeting - Heidelberg

  10. Overlap cabling EMB & EMEC overlap channels summed at the receivers level ‘octopus’ cable 37-pin to 4 x 9-pin connectors Barrel Receiver EMB Overlap ‘E’ connector VGA VGA EMEC Overlap + EMEC Receiver L1Calo Joint Meeting - Heidelberg

  11. Overlap cabling ‘E’ connectors 4 x 4-pair cables EMB Crate Breakout box Bill Cleland Pittsburgh EMEC Crate • All cables installed • Cables prod. & inst. • Michel Mathieu • Andrei Akimov 1 x 16-pair cable L1Calo Joint Meeting - Heidelberg

  12. Overlap timing from beam-splash events • Octopus cables 5S & 1S were in place • Set receiver gains to alternate the EMB/EMEC signal components vs phi connector 2 0 1 0 7 0 1 6 1 0 5 0 1 4 pair 1 0 3 0 1 2 1 0 1 0 1 0 EMB EMEC A-Side L1Calo Joint Meeting - Heidelberg

  13. Overlap timing from beam-splash events phi C-Side A-Side • TT to TT timing raisonnable for EMB • Unexpected offset between EMB & EMEC… EMEC EMB • Cables longer than nominal values • To be on the safe side • ~10-15 ns • Non nominal TBB delays • ~3-6 ns • Bug in length calculations • ~20 ns • Still 15-20 ns to be understood • PS rise time • ≠ energy fraction EMEC EMB EMEC EMEC EMB EMB 50 ns 63 ns [bc] [bc] L1Calo Joint Meeting - Heidelberg

  14. Tower Builder Boards delays • Calibration delays set until first collisions • Determined from single-layer phos4 runs • Then moved to physics delays • Based on calibration delays + LAr tool to get physics/calib. time difference • Central towers not timed • Caused by physics delays Ps Fr Md Bk eta=0.15 (0x00140500): 6 7 7 6 eta=0.05 (0x00100c01): 0 0 0 7 • Back layer is the culprit • Most probably bug in calibration cable length used to compute phys/calib difference L1Calo Joint Meeting - Heidelberg

  15. Ongoing work • TBB delays database, Paolo working on it • Understand physics delays at eta=0 • Barrel/End Cap overlap region • Have to accumulate data to check/compute timing • Understand discrepancies wrt computed values L1Calo Joint Meeting - Heidelberg

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