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T0 offline status Alla Maevskaya for T0 team ALICE offline week 6 July 2010

T0 offline status Alla Maevskaya for T0 team ALICE offline week 6 July 2010. Outline. What was new in T0 code Reconstruction LHC10b LHC10c recent runs reconstruction QA Calibration. Alla Maevskaya ALICE offline week 6 July 2010. Some news about T0 code.

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T0 offline status Alla Maevskaya for T0 team ALICE offline week 6 July 2010

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  1. T0 offline status Alla Maevskaya for T0 team ALICE offline week 6 July 2010

  2. Outline • What was new in T0 code • Reconstruction • LHC10b • LHC10c • recent runs reconstruction • QA • Calibration Alla Maevskaya ALICE offline week 6 July 2010

  3. Some news about T0 code • Move L0/L1 trigger delays from AliRecoParam to OCDB; • Dummy SDigits were implemented; • Parameters of material optical properties defined for T0 did not work correctly with Geant4, fixed now (thanks to Alexei); • AliESDTZEROfriends were implemented but were not used yet; • AliT0Reconstructor was tuned for current data; • AliT0RawReader collects bunch ID from TRM header. Alla Maevskaya ALICE offline week 6 July 2010

  4. Physics runs April 2010 During the April 2010 data taking: ELMB switched off (not possible to change the thresholds and walk time for CFDs)‏ Laser did not work so we could not prepare time-amplitude calibrations But: Early fired peak Only events with LED-CFD amplitude > 540 were reconstructed Alla Maevskaya ALICE offline week 6 July 2010

  5. LHC10b Pass2, run 115318 (T0A+T0C)/2 T0A T0C (T0A-T0C)/2 coorected by SPD vertex Alla Maevskaya ALICE offline week 6 July 2010

  6. LHC10b Pass2 run 115318vertex resolution SPDvertex(Ncontributers>1)‏ T0 vertex T0vertex in events without SPD vertex SPDvertex – T0vertex Alla Maevskaya ALICE offline week 6 July 2010

  7. LHC10b : T0 resolution and efficiency Alla Maevskaya ALICE offline week 6 July 2010

  8. May10 - LHC10c From May 2010 data taking: ELMB switched on (new thresholds & walk times for CFDs) Time-amplitude correction graph prepared by Laser Calibration System Alla Maevskaya ALICE offline week 6 July 2010

  9. CDH and T0 bunch ID Single_6b_3_3_3 Single_13b_8_8_8 Good correlation Run 120244 Run 120824 Alla Maevskaya ALICE offline week 6 July 2010

  10. Problems with LHC10c runs: no correlation with SPD in the filling schemes Single_6b_3_3_3 and Single 13b_8_8_8 Only events with TRM BC ID - CDH BC ID ==37 (diagonal )‏ were chosen for reconstruction Run 120244 Single_6b_3_3_3 Single 13b_8_8_8 run 120824 T0 vertex and SPD vertex T0 vertex – SPD vertex Alla Maevskaya ALICE offline week 6 July 2010

  11. Recent runs with filling scheme Single_7b_4_4_4 run 125078 5 July alien:///alice/data/2010/LHC10d/000125078/raw/10000125078045.10.rootalien:///alice/data/2010/LHC10d/000125078/raw/10000125078045.20.root Alla Maevskaya ALICE offline week 6 July 2010

  12. Recent runs with filling scheme Single_7b_4_4_4 run 125078 alien:///alice/data/2010/LHC10d/000125078/raw/10000125078046.10.root alien:///alice/data/2010/LHC10d/000125078/raw/10000125078046.20.root alien:///alice/data/2010/LHC10d/000125078/raw/10000125078043.10.root alien:///alice/data/2010/LHC10d/000125078/raw/10000125078043.20.root Alla Maevskaya ALICE offline week 6 July 2010

  13. Good runs from T0 point of view LHC10b and LHC10c • All LHC10b • with both filling scheme Single_2b_1_1_1 and Single_3b_2_2_2 • LHC10c • - 900Gev runs • 7TeV: • 118903 – 119163 filling scheme Single_2b_1_1_1 • Bad runs: • 119837 – 119862 due to TRM problem • Problem runs: • all runs 120064-end of LHC10c – filling schemes Single_6b_3_3_3 and Single_13b_8_8_8 without correlation with SPD vertex 13 Alla Maevskaya ALICE offline week 6 July 2010

  14. Changes in T0 reconstruction • AliT0RawReader , storing TRM BC ID • AliT0Reconstructor: • only events with TRM BC ID – CDH BC ID ==37 (magic number, should be read from AliT0RecoParam) are to be reconstructed; • time-amplitude calibration by QTC amplitude will be used only for LCH10d (and later on) data Alla Maevskaya ALICE offline week 6 July 2010

  15. QA: DQM shifter histograms During data taking laser calibration with given amplitude will take place in big gaps between bunches to check PMT and electronics Alla Maevskaya ALICE offline week 6 July 2010

  16. QA RAW Coming soon for us to be published in logbook for DQM shifter Alla Maevskaya ALICE offline week 6 July 2010

  17. Calibration DA T0Physda is running on T0 DAQ machine during physics runs. It collects time shifts between channels and T0 time for control clock shift. DA T0Laserda running during set of runs “AMPLITUDE_CALIBRATION” and produces data for time-amplitude calibration. But mostly data was not smooth and handmade treatment needed. I hope to solve this as soon as possible Alla Maevskaya ALICE offline week 6 July 2010

  18. Do be done • Get online calibration data automatically • Implement pass0 calibration as AnalysisTask to run after reconstruction • New set of DQM histograms • AliT0Checker should be improved and colored in “MUON” style • New OCDB object should be added • New parameters should be added in AliT0RecoParam Alla Maevskaya ALICE offline week 6 July 2010

  19. Back up slides

  20. Run 120824 Single_13_8_8_8 Chunk 45 Chunk 56 Chunk 57 Chunk 58

  21. Run 120244 Single_6b_3_3_3 Chunk 45 Chunk 43

  22. Run 125078 5 July Single_7b_4_4_4 10000125078046 10000125078045 10000125078043.20 10000125078044

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