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Data Taking Statistics Week of 2003 March 17-23

Data Taking Statistics Week of 2003 March 17-23. Corrections to Physics Luminosity & Events to Tape Special Runs: QCD Jet Gap Trigger Study Recorded 67 nb -1 & 221k of non-Physics events. Physics: Recorded Lumi = 4.9 pb -1 or 81.4% of Del. Lumi

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Data Taking Statistics Week of 2003 March 17-23

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  1. Data Taking StatisticsWeek of 2003 March 17-23 • Corrections to Physics Luminosity & Events to Tape • Special Runs: QCD Jet Gap Trigger Study • Recorded 67 nb-1 & 221k of non-Physics events • Physics: Recorded Lumi = 4.9 pb-1 or 81.4% of Del. Lumi • Recorded 9.2 million Physics Quality Events • Compared to best performance: Week of 2002 Dec 30-2003 Jan 5 •  5.6 pb-1 and 14.5 million events Alan L. Stone - Louisiana Tech University

  2. Delivered Luminosity Losses Major Sources of Downtime: Not recording during a store • ~1.0 hrs: SMT HDIs - 3-4 times during stores • Silicon device gets “stuck” and needs to be reinitialized or disabled • ~1.0 hrs: L1 CTT– 2-3 times during stores • Significant commissioning efforts outside of a store unintentionally affects data taking during stores • ~1.0 hr: 50 Run transitions (~1 minute/per) • ~1.0 hr: 11 Begin or End Store transitions (~5 minutes/per) • ~2-3 hrs: Average 5% FEB during physics data taking Other Losses Alan L. Stone - Louisiana Tech University

  3. Four Controlled Accesses 17:00-17:15 Tue Mar 18th CFT PS Voltage Check 06:30-08:00 Fri Mar 21st Calorimeter BLS Power Supply & Noise Study L1 Muon, L1 CTT, FPD Commissioning 12:00-14:00 Sat Mar 22nd FPD Commissioning Calorimeter Noise Study 00:30-01:00 Mon Mar 24th Muon Pixel Front End Board Not properly seated on rails Improved online data handling stability “Many to one” Problem Too many connections between the 82 L3 farm nodes & the online host During mini-March shutdown, L3 farm nodes increased from 48 to all (82) dual connections Hit a wall at >40 Hz to tape Split data stream to three collector/routers Stable running at <55 Hz to tape We could run at ~100 Hz to tape with current event size, but… Exceeds tape budget Likely will need additional dataloggers Other D0 News Alan L. Stone - Louisiana Tech University

  4. How well are we doing? Alan L. Stone - Louisiana Tech University

  5. Monthly Data Taking Efficiency Alan L. Stone - Louisiana Tech University

  6. D0 Integrated Luminosity Alan L. Stone - Louisiana Tech University

  7. Plans for Upcoming Week • No major problems affecting physics data taking • Continue to utilize short controlled access opportunities • Tracking Trigger & FPD Commissioning • Infrequent minor Muon, SMT & Calorimeter electronic or hardware issues • If shutdown opportunity of >12 hours arises, we will consider replacing CAL preamp fan (Requires opening detector) Add 3 or more Stores to this list nextweek! Alan L. Stone - Louisiana Tech University

  8. L1/L2/L3 RatesStore 2128 – Thu Mar 20th from 08:47 Initial D0 Luminosity was 3.95E30 ~86% Eff. Separator Scan Studies Alan L. Stone - Louisiana Tech University

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