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Coordination Summary of Level-1 Calorimeter Trigger Joint Meeting - May 2010

This document summarizes the key discussions and outcomes from the Level-1 Calorimeter Trigger Joint Meeting held from May 5-7, 2010, at the Rutherford Appleton Laboratory. Topics covered include an overview of operational issues, future beam prospects, calibrations, firmware updates, noise management, and the progress of calibration activities. The timeline details significant events, like energy scans and calibration challenges, while future work outlines ongoing experiments and areas needing improvement to ensure optimal trigger performance.

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Coordination Summary of Level-1 Calorimeter Trigger Joint Meeting - May 2010

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  1. L1Calo Run CoordinationSummary Bruce M. BarnettSTFC, Rutherford Appleton Laboratory Level-1 Calorimeter Trigger Joint MeetingMay 5-7, 2010 B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  2. Overview Time line Blow-by-blow Operational issues Future beam Future work Overview B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  3. Heidelberg Meeting 11th -13th January Splashes 28th February The trigger everybody loves ring of fire trigger annulus eta 1.6 -> 2 (and reflection in eta for beam 1) (mostly) Tile A cells Time line B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  4. Nice Events 5th April Time line • World record • 19th March • Nice Events • 5th April • Lumigrows • In jumps and starts B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  5. January Firmware fixes, calibrations, stopless removal 29th January rxfactors_veit_calib_lar_144829_tile_143479.dat February Jep0-cmm1 Readout errors: clock phases fixed JEP blocked hoses OPM cleans and purges Calibrations, firmware, rate-tests, LHC dry runs 24th February EtConversion:CalibGains:MskOvEmecOnly TBB gains updated to delay_phys_20100223 from delay_phys_20100112 Blow-by-blow B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  6. March Energy scans, (Tile/Larg: 2/3 March) Occasional g-link error one link (Cmm) Firmware, monitoring, noise hunts Simulation Errors … Prompt fixes to code MCM Replacements Receiver segment, Largto L1Calo migration tests Calibration runs, phos4 saturation runs CP Rare-RoI error investigations & h/w fix 1st March EtConversion:CalibGains:MskOvAlt1 26 March rxfactors_veit_calib_lar_144829_tile_151144_fcal_149451.dat Blow-by-blow B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  7. April 1stApril Noise Thresholds to nominal (4/4 from 3/4), Cosmicsre-enabled Online monitoring from physics events only Start to see luminosity dependent trigger rate! “Got ~4 million events - and the ephemeral glory of the data taking record: ~20 microbarn-1.” 8th April Timing A few badly timed channels … Occasional spiky triggers Causing irritation through EMPTY (Cosmic) triggers More simulation errors MCM related: fixed MCMs with readout issues Online monitoring ATHENA Stability problems due to database-access issues at startup Blow-by-blow B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  8. April 15st April Pedestals Poorly set, particularly in Tile, after Intervention (8th March) Error in validation procedure crept in during last s/w update. AND …. Is the FJ Rate too low? Really? Hardware New broken channel in FCAL1 (0x04100f03) For next scope session In Run 152772 (April 9th) one cable from JEM0-CMM0 to JEP1-CMM0 (Energy Mergers) found itself disabled.  Simulation errors and fixes Larg Receiver Work Bad channel investigations Updated to 2010 Splash timings Prior to run 152705 Attempted E Calibration Blow-by-blow B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  9. April 22nd April PPM Readout Occasional G-Link Parity errors PP1-PPM15 Larg E Scan April 16th (Damien/Martin) 29th April Occasional cosmic (EMPTY items) burps Noise cut tests (3/4) 3-4 day technical stop ATONR migrations Calibrations Blow-by-blow J5 EM2 B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  10. Calibration Energy scans infrequent Currently expert activity Calibration slots between fills are 1 hour …. A bit short for anything but PEDS/DACS 3 hours. Fewer of these and often at unsociable times Shifter should call … but often forgets Shift leader should publish e-log But these aren’t in real-time Solution Need to provide shifter-friendly software Exceptionally robust so as to preclude failures/confusions Provide default calibration rules Operational issues B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  11. “Original” approved steps Future beam B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  12. How to get there? Fat bunches? Bunch trains? (50 ns spacing) crossing angles? Future beam B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  13. Future beam As Presented at ATLAS Weekly Meeting, May 4, /2010 B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  14. Shorter term Noise cut studies (ongoing) Calibration issues (eg, FCAL) Re-do phos4 runs for saturated pulse studies Confirm/tweak timing with aggregated TeV statistics (June?) Overlap cable timing/lengths Longer term Mini-phos4 scans with beam TBB and Tile layer timing Fully optimised filter coefficients Dead channel corrections Energy scales (EM/HAD) Future work B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

  15. B.M. Barnett - STFC/RAL - L1Calo Joint Meeting

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