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ECAL: fills 1755 - 1816

ECAL: fills 1755 - 1816. Average relative PmToPin change with respect to 1 st run (fill 1755). Red: physics runs Black: the rest. Trend, shown 25/05. 1812. 1815. 1755. 1799. Time, minutes. One point per run. 1804. 1816. ECAL: fills 1755 - 1816.

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ECAL: fills 1755 - 1816

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  1. ECAL: fills 1755 - 1816 Average relative PmToPin change with respect to 1st run (fill 1755) Red: physics runs Black: the rest Trend, shown 25/05 1812 1815 1755 1799 Time, minutes. One point per run 1804 1816

  2. ECAL: fills 1755 - 1816 • With respect to the trend shown 25/05/2011: three long fills 1812, 1815, 1816 (~10 hours each) + few short fills (1-3 hours), time period: after bold blue line • Further decrease of average PMT/PIN with respect to the reference point (up to 3% in case of Inner section, individual trends for each section are below, in spare slides) • Systematic decrease starts from the fill 1799. Would be interesting to compare ECAL and HCAL behaviour: • ECAL: clear fibers rad. damage + PMT ageing • HCAL: PMT ageing should dominate • Next slides: • ECAL/HCAL trends for average PMT/PIN ratios change, fills 1799-1816 • ECAL/HCAL behaviour during the yesterday’s fill 1816 including two runs taken during PHYS_ADJUST

  3. ECAL: fills 1799 - 1816 Average relative PmToPin change with respect to 1st run (fill 1799 , run 92035) REFERENCE POINT IS DIFFERENT WITH RESPECT TO THE TREND ON THE FIRST SLIDE 1816 1799 1783 Time, minutes. One point per run

  4. HCAL: fills 1799 - 1816 Average relative PmToPin change with respect to 1st run (fill 1799, run 92035) REFERENCE POINT IS DIFFERENT WITH RESPECT TO THE TREND ON THE FIRST SLIDE ?!! “Cupola” shapes – not like in ECAL 1799 1783 1816 Zoom Time, minutes. One point per run

  5. HCAL: fills 1755, 1756 + MD period Average relative PmToPin change with respect to 1st run (fill 1755, run 90639) “Cupola” shape run #91210 1755 1783 1756 Looks like in the absence of the beam the behaviour is different (or at least the effect is less pronouncing) – see also “zoom” insertion in prev slide Time, minutes. One point per run

  6. Average relative PmToPin change with respect to 1st run (92651) X: Relative run # PmToPin(92675) /PmToPin(92651) ECAL, fill 1816, ~9hours PmToPin(92675) /PmToPin(92651), Inner PmToPin(92675) /PmToPin(92651), Outer PmToPin(92675) /PmToPin(92651), Middle

  7. X: Relative run # Average relative PmToPin change with respect to 1st run (92651) PmToPin(92675) /PmToPin(92651) HCAL, fill 1816, ~9hours PmToPin(92675) /PmToPin(92651), Inner PmToPin(92675) /PmToPin(92651), Outer

  8. HCAL, fill 1816, ~9 hours, physics data only (first 2 points are omitted wrt previous slide) Average relative PmToPin change with respect to 1st run (92654) X: Relative run # PmToPin(92675) /PmToPin(92654), Inner PmToPin(92675) /PmToPin(92654), Outer

  9. Impressions: fills 1799 - 1816 • HCAL trend shows gradual decrease of average PMT/PIN in time, but size of effect is much smaller than in ECAL (~0.6% instead of ~2%) • Different behaviour during the fill: ECAL shows an exponential-like decrease while average HCAL response has a “cupola” shape [? Physics data taking only ?] • Fill 1816: non-gaussian “tail” on HCAL distributions PmToPin(92675) /PmToPin(92651). Distributions become better if only “physics” runs are considered (also valid for ECAL) • Raw PMT readings (not corrected with PINs): the behaviour is similar Last three slides: • Follow-up on: • relative average PMT/PIN ratio change over fill vsLumi, ECAL • net charge passed through ECAL phototubes (via integrators) • Ttends for net consumptions from Agilent power supplies

  10. Signal change per fill, fills 1748-1816 Red entries: addition to plot shown 25/05 (fills 1805-1816) Similar dependencies for each section individually: see below, in spare slides

  11. I22/32 O48/22 Net charge Q, C Net charge according to the integrators 1 Mar t, sec 30 May <Q>vs R Black: C, top Red: C, bottom Green A, top Blue: A, bottom Q vs R R, cm R, cm

  12. ECAL: consumptions from MV Looks like further decrease of net consumption 22 Mar 30 May I, A I, A t, sec t, sec C-side A-side

  13. HCAL: consumptions from MV Unlike ECAL, consumptions slowly increase (following number of BX increase, looks natural) 22 Mar 30 May I, A I, A t, sec t, sec C-side A-side

  14. Impressions • Relative average PMT/PIN ratio change over the fill vsLumi: looks like no further decrease after certain value of Lumi • Net charge passed through ECAL phototubes (via integrators): up to 4 C (since 01/03/2011) • It seems that in case of ECAL average consumptions from Agilent PS continue decreasing. To be verified in the absence of beam. Decrease could mean that something is getting worse…

  15. Spare slides: Individual plots for sections

  16. ECAL: fills 1755 – 1816, Inner Red: physics runs Black: the rest Average relative PmToPin change with respect to 1st run (fill 1755) 1812 1815 1755 1799 Time, minutes. One point per run 1804 1816

  17. ECAL: fills 1755 – 1816, Middle Red: physics runs Black: the rest Average relative PmToPin change with respect to 1st run (fill 1755) 1812 1815 1755 1799 Time, minutes. One point per run 1804 1816

  18. ECAL: fills 1755 – 1816, Outer Red: physics runs Black: the rest Average relative PmToPin change with respect to 1st run (fill 1755) 1812 1815 1755 1799 Time, minutes. One point per run 1804 1816

  19. Signal change per fill, fills 1748-1816, vsLumi Red entries: addition to the plots shown 25/05 (fills 1805-1816)

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