U.S. CMS Detector Operations Outline Cathy Newman-Holmes 13 February 2013 • Overview of CMS Operations Collisions - 2012 Efficiency, Down time • Survey of US CMS subsystems 2012 Performance • Operations Cost and Milestones • Summary U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 1
pp Collisions March - Dec 2012 • 8 TeV proton-proton collisions 11 March 2012 – 16 December 2012. • CMS recorded 21.79 fb -1 from 23.30 fb -1 delivered (= 94%). • This is more than 4 x the data sample at the last review (March, 2012). • Also note that efficiency for 2011 data collection was 91%. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 2
p-Pb Collisions January – February 2013 • Proton – Lead collisions started 20 Jan 2013. • CMS recorded 31.13 nb -1 from 31.69 nb -1 delivered (= 98%). U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 3
Average efficiency in 2012 from M. Chamizo Llatas Period Delivered* Recorded* Efficiency Downtime Dead-time Luminosity fb- Luminosity fb- (luminosity) 1 1 April-June 6.78 6.26 92.3% 5.9% 1.8% July-21Aug ** 4.97 4.73 95.1% 3.8% 1% 22Aug-16 2.99 2.74 94.4% 4.1% 1.5% Sep 26 Sept-7Oct 1.44 1.37 95.1% 3.4% 1.5% 7 Oct-6 Dec 6.87 6.51 94.8% 3.7% 1.5% ** Fills 2957, 2992 and 2993 with B=OFF in August have been excluded: ~0.5/fb Huge effort from all sub-systems, shifts crews, on-call experts, to reach this level and maintain it U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 4
Recorded vs Delivered vs Certified Luminosity March – Dec, 2012 From S. Maruyama “Golden” luminosity Luminosity for Muon Analyses • Efficiency of good (“golden”) selection = 91.1%. All systems are certified as good for these data. • “Golden” plot above shows 19.6 fb -1 good for any analysis. • We have 20.7 fb -1 for muon only analyses (efficiency = 96.3%). Tracker and muon systems are certified good for these data. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 5
Fraction of live channels 2010-2012 98% 98% 99% 99% Dec 2012 • CMS working well after three years of operation. • Thanks to the huge effort of many people to maintain the detector. • Note that order of subsystems on vertical scale is reversed for 2010 – 2012. from M. Chamizo Llatas U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 6
Run Time Logger • Plots on this page are from the web-based Run Time Logger – for all 2012 proton- proton collisions. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 7
Run Time Logger - categories • Largest single source of lost luminosity (21%) was due to tracker DAQ. • All groups have been working hard to reduce downtime. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 8
Pile-up History from M. Chamizo Llatas Period Peak average pile up 2010 2010 3.5 2011 18 2012 34 2011 2012 LHC increasing bunch charges β * = 0.6 m and bunch charges β * from 1.5m to 1m 1.6x10 11 protons/bunch Two “special high pile” up fills in 2011 Two “special high pile” up fills in 2012…will they became “standard” operation in 2012 become “standard operation” after LS1 ? U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 9
Run Coordination organization for 2012 Upgrade Run Coordinator: M. Chamizo-Llatas Project U.S. names in red. Deputies: G. Rakness, C. Delaere Cross- coordination Organization G.Rakness support/training Detectors : A.Barisone coordination area Sub-detectors BRM LUMI L1 HTL DQM Offline Heavy Tracker, ECAL,HCAL,DT,RPC,CSC Ops Ops mgr Ops mgr Ops mgr Ops mgr Ops mgr Ops mgr Ions mgr Ops mgr DPG coordinator: PPD C.Delaere L1 Tracker ECAL HCAL DT CSC RPC DPG DPG DPG DPG DPG DPG DPG A.Heister P.Merkel A.Bornheim O.Kodolov M.Pelliccioni T.Cox C.Carrillo D.Petyt C.Battilana A.Venturi a L.Guiducci V.Paltchik K.Bunkowsk & V.Mihai S.Banerjee i Detectors Projects U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 10
US CMS Detector Operations- Level 2 Managers New Deputy Detector Operations Manager: Vivian O’Dell. • Blue italics Appointed since last review (both were already deputy L2s). • Drawings of subdetectors and U.S. institutions working on each are in the background slides at the end of this talk. • Upgrade R&D will be described by Daniela Bortoletto in a later talk. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 11
Tracker 2012 Performance from S. Nahn • Highest priority: Stable Running to maximize useful data sample. Detector Start Now % 2012 % TIB/TID 95.02 94.63 TOB 98.13 97.79 TEC+ 98.81 98.81 TEC- 99.13 99.13 Tracker 97.75 97.48 Failures understood, potentially addressable in LS1. Active, Masked U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 12
Tracker Uptime from S. Nahn • CMS: 21.8 fb -1 collected TK related lost lumi 0.231 fb -1 , ~ 1% absolute Offline: Additional 0.166 (HV off) + 0.070 (misc) fb -1 bad • Major sources fixed or mitigated Firmware upgrades for robust handling of intermittent data corruption Soft Error Recognition/Recovery - 1- 2 minute “stop start” replaced with < 30 second recovery. • HV turn-on was automated. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 13
Effects of CPU and memory improvements from K. Stenson ● Many improvements over the past 2 years have yielded substantial savings in CPU and memory use. Some of this comes from better compilers but most comes from improved tracking code. ● But CPU time still shows significant non-linearities with pileup. ● Results for track reconstruction only; data results from 2011 high pileup run with about 35 pileup. 200 events from 2011 high pileup run 1 U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 14 4
Track Reconstruction Success • Tracker is crucial for charged lepton reconstruction (e, µ) • From a high-pileup run, we have an event with 78 reconstructed vertices. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 15
Pixel Detector - 2012 from S. Zenz • # of working channels has not changed much in 2012. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 16
Single Event Upset Automatic Recovery • Radiation from proton collisions causes single event effects in detector electronics. Scope of effects range from being hardly noticeable to stopping the run. Started to become an issue with increasing luminosity in 2011. • 2012: full commissioning of automatic soft error recovery. Depending on the error and the system, this is done via hardware or software. • Systems continue to automate recovery from known problems. • Pixels Overall: 3-4 minute recovery time → 12 seconds • Saved 15 hours of running in 2012! U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 17
Pixel Luminosity Telecope (PLT) From J. Hegeman • During the 2011 Extended Technical Stop, a PLT demonstrator was installed on the CASTOR table. • Proto-PLT up-and-running since first 2012 beams. • Running unattended since July, 2012 (with on-call coverage). • First generation DAQ works and electronics perform as designed. • In the 2012 pilot run, a decrease of diamond pulse height at high particle rates was observed. A high priority effort is to confirm this All hardware is in-hand. One effect can be eliminated through quarter PLT will be installed as removal of surface material. dry-run in March 2013. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 18
ECAL detector status Good overall status of ECAL and ES. Very little evolution in number of dead channels Active channels: EB EB+EE EB EE ES 2011-Nov 99.07 99.16 98.72 95.1 2012-Febr 99.04 99.16 98.54 95.1 2012-Mar 99.04 99.16 98.54 96.9 2012-Dec 98.97 99.11 98.38 96.8 • Number of bad channels stable EE- • Very few single bad channels EE+ • Periodic good health checks to record in detail the performance of each channel and monitor their evolution vs time • Possibility to recover of a large fraction of the masked 5x5 regions in EE+ in LS1 From F. Cavallari U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 19
New Laser from F. Cavallari ● The new laser was procured/commissioned/installed on schedule and used throughout the 2012 run. ● There were no hardware failures on the new laser itself, in contrast to the old lasers that required frequent interventions (lamps replaced etc). • After some initial operational optimization at P5, very stable operation. • In summer some degradation traced to auxiliary optics. • End of summer some degradation suspected to be caused by issues internal to the laser. reduced pump current from ● 55 to 45 A for precaution. Very stable operation since then. ● The quality of the transparency corrections was not degraded. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 20
ECAL Performance from B. Cox - mass resolution important for Higgs discovery. Both electrons in EB One e in EE + one in EB. U.S. CMS Detector Operations 13 February 2013 C. Newman-Holmes 21
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