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IEEE NPSS Real Time Conference 2009 Commissioning and First Experience of the ALICE Data IEEE NPSS Real Time Conference 2009 Commissioning and First Experience of the ALICE Data Acquisition System Vasco Barroso ALICE DAQ

Outline CERN, LHC & ALICE DAQ Monitoring Calibration Storage Commissioning Highlights from 2008 Plans Outline CERN, LHC & ALICE DAQ Monitoring Calibration Storage Commissioning Highlights from 2008 Plans for 2009 Conclusion 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 2/35

CERN European Organization for Nuclear Research Particle Physics 20 member states Franco-Swiss border 8000 CERN European Organization for Nuclear Research Particle Physics 20 member states Franco-Swiss border 8000 users, 85 nationalities 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 3/35

LHC 27 Km ring, 100 m underground Superconducting temperatures (-271°C) 14/05/2009 Vasco Chibante Barroso LHC 27 Km ring, 100 m underground Superconducting temperatures (-271°C) 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 4/35

ALICE A Large Ion Collider Experiment Study of strongly interacting matter and the quark-gluon ALICE A Large Ion Collider Experiment Study of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC Complex experiment for online systems 10 sub-detectors providing input to the trigger 2 types of beams: pp and Pb-Pb Multiple partitions and multiple detector clusters 18 sub-detectors > 1 PB of data every year Not surprisingly: complex commissioning! 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 5/35

ALICE 26 x 16 meters 10, 000 tonnes 14/05/2009 Vasco Chibante Barroso – ALICE ALICE 26 x 16 meters 10, 000 tonnes 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 6/35

ALICE DAQ Rare/All BUSY CTP L 0, L 1 a, L 2 BUSY LTU ALICE DAQ Rare/All BUSY CTP L 0, L 1 a, L 2 BUSY LTU L 0, L 1 a, L 2 TTC FERO Event 120 DDLs 360 DDLs Fragment 430 D-RORC LDC Load Bal. DDL H-RORC FEP HLT Farm FERO 10 DDLs D-RORC 10 D-RORC LDC 90 Detector LDC D-RORC LDC 10 HLT LDC LDC Sub-event Event Building Network EDM Event GDC TDSM 30 GDC 10 TDSM DA DQM 20 DA/DQM DSS 18 DSS File Storage Network 25 TDS 14/05/2009 Vasco Chibante Barroso – ALICE DAQ Archiving on Tape in the Computing Centre (Meyrin) PDS 7/35

ALICE DAQ: Control Model ECS: Experiment Control System DCS: Detector Control System CTP: Central ALICE DAQ: Control Model ECS: Experiment Control System DCS: Detector Control System CTP: Central Trigger Processor DAQ: Data Acquisition HLT: High Level Trigger ECS DCS 14/05/2009 CTP DAQ Vasco Chibante Barroso – ALICE DAQ HLT 8/35

ALICE DAQ: Standalone DCA: Detector Control Agent LTU: Local Trigger Unit ECS DCA DCS ALICE DAQ: Standalone DCA: Detector Control Agent LTU: Local Trigger Unit ECS DCA DCS TPC HV 14/05/2009 LTU TPC Control Gas LV TPC LTU DAQ Run Control TPC LDC 1 LDC 2 Vasco Chibante Barroso – ALICE DAQ … HLT TPC LDC 216 Farm 9/35

ALICE DAQ: Global PCA: Partition Control Agent PCA SPD DCA TPC DCS TPC LTU ALICE DAQ: Global PCA: Partition Control Agent PCA SPD DCA TPC DCS TPC LTU TPC DAQ TPC DCS SPD 14/05/2009 DCA Muon DCA SPD HLT TPC LTU SPD DCS Muon DAQ SPD LTU Muon DAQ Muon HLT SPD Vasco Chibante Barroso – ALICE DAQ 10/35

Monitoring Data Quality Monitoring System monitoring AMORE framework LEMON Operational logs Info. Logger Upcoming Monitoring Data Quality Monitoring System monitoring AMORE framework LEMON Operational logs Info. Logger Upcoming dedicated tool Run statistics ALICE Electronic Logbook 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 11/35

Monitoring: DQM “The ALICE Data Quality Monitoring“ Barthélémy von Haller Today CMS 2 17: Monitoring: DQM “The ALICE Data Quality Monitoring“ Barthélémy von Haller Today CMS 2 17: 30 -18: 50 Framework in production. 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 12/35

Monitoring: ALICE Logbook 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 13/35 Monitoring: ALICE Logbook 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 13/35

Calibration: Detector Algorithms DA = Calibration task running online provided by the sub-detectors teams Calibration: Detector Algorithms DA = Calibration task running online provided by the sub-detectors teams Online Offline detector data reconstruction DA configure 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 14/35

Storage 14/05/2009 “THE ALICE STORAGE SYSTEM: an Analysis of the Impact on the Performance Storage 14/05/2009 “THE ALICE STORAGE SYSTEM: an Analysis of the Impact on the Performance of the Configuration Parameters and of the Load of Concurrent Streams“ Adriana Telesca Tomorrow TDA 6 17: 30 -19: 00 Vasco Chibante Barroso – ALICE DAQ 15/35

Commissioning 1 st Circulating Injection tests beam 8 Aug, 24 Aug 10 Sep First Commissioning 1 st Circulating Injection tests beam 8 Aug, 24 Aug 10 Sep First particles from Helium leak incident 19 Sep machine 15 Jun 2007 2008 2009 Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May 1 st global 2 nd global 3 rd global period 5 May – 20 Oct 10 -21 Dec 4 Feb-9 Mar Installation & Commissioning 24/7 operation 14/05/2009 Installation & Upgrade Vasco Chibante Barroso – ALICE DAQ 16/35

Commissioning: ACR Day… and night 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 17/35 Commissioning: ACR Day… and night 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 17/35

Commissioning: Standalone commissioning Detector hardware, firmware, software Services: cabling, cooling, power supplies, etc Interfaces Commissioning: Standalone commissioning Detector hardware, firmware, software Services: cabling, cooling, power supplies, etc Interfaces to online systems Online commissioning process Exposed to variety of triggers (cosmic, pulser up to 40 MHz, random) Data taking stability tests Control procedure up to the state “Ready for Data Taking” Calibration procedure Integration to global partition 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 18/35

Commissioning: Standalone Time (hours) of standalone runs per detector Dec '07 Feb-Mar '08 May-Oct Commissioning: Standalone Time (hours) of standalone runs per detector Dec '07 Feb-Mar '08 May-Oct '08 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 19/35

Commissioning: Global Exercise stability Sub-detectors, services, online systems 23 systems 0. 97 23 < Commissioning: Global Exercise stability Sub-detectors, services, online systems 23 systems 0. 97 23 < 0. 5 ! Measure performance Sub-detectors readout time and event size Online systems Take data Cosmic data for sub-detector alignment Calibration (e. g. TPC with krypton or laser) Organize operations 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 20/35

Commissioning: Global 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 21/35 Commissioning: Global 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 21/35

Commissioning: Global 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 22/35 Commissioning: Global 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 22/35

Commissioning: Global runs Time (hours) of global runs as a function of the number Commissioning: Global runs Time (hours) of global runs as a function of the number of detectors Dec '07 Feb-Mar '08 May-Oct '08 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 23/35

Commissioning: System stability Stability of global runs has improved substantially during the cosmic runs Commissioning: System stability Stability of global runs has improved substantially during the cosmic runs Fraction of subevents as a function of minimum run duration Dec '07 14/05/2009 Feb-Mar '08 May-Oct '08 Vasco Chibante Barroso – ALICE DAQ 24/35

Commissioning: Totals Cumulated amount of data readout from sub-detectors 515 days data-taking 3 PB Commissioning: Totals Cumulated amount of data readout from sub-detectors 515 days data-taking 3 PB read-out ~350 TB recorded to tape in total Global runs 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 25/35

Commissioning: Period I TOF Comparison of hit time distribution in ACORDE and random triggers Commissioning: Period I TOF Comparison of hit time distribution in ACORDE and random triggers SPD Comparison of number of clusters per event in the 2 SPD layers 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 26/35

Commissioning: Period II TPC Cluster distribution Resolution over drift length MUON_TRK Online data monitoring Commissioning: Period II TPC Cluster distribution Resolution over drift length MUON_TRK Online data monitoring vs offline analysis 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 27/35

Commissioning: Period III SPD Top vs bottom alignment SDD Drift speed calibration vs position Commissioning: Period III SPD Top vs bottom alignment SDD Drift speed calibration vs position SSD p-n charge correlation 14/05/2009 after alignment before alignment Vasco Chibante Barroso – ALICE DAQ 28/35

Commissioning: 1 st LHC particles On 15 June 2008, the ALICE SPD in self-triggering Commissioning: 1 st LHC particles On 15 June 2008, the ALICE SPD in self-triggering mode (L 0) sees one of the first “sign of life” of LHC during the beam injection test in Tl 2 Run 38795 Time 18: 10 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 29/35

Highlights from 2008 Services Detectors Work in progress for firmware and software => readout Highlights from 2008 Services Detectors Work in progress for firmware and software => readout time and zero suppression (event size) Noise and grounding Online systems Data “reconstruction ready” formatting => CPU intensive Control scalability Sub-detector control sequences not yet fully automated Successful commissioning of ALICE and ready for startup in September ‘ 08 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 30/35

Goals for 2009. . . and after Rare/All CTP Ready for a. L 0, Goals for 2009. . . and after Rare/All CTP Ready for a. L 0, L 1 a, L 2 nominal data. BUSY taking year: BUSY LTU DDL 10 months L 0, L 1 a, L 2 1 month Pb-Pb pp + H-RORC TTC Full deployment of the DAQ system FERO Increase of HLT CPU power Event Fragment FEP D-RORC Load Bal. LDC Reduce size of shift crews Sub-event 125 Detector LDC 90 Detector LDC FEP HLT Farm FERO 10 DDLs Improve feedback to shift crew (DQM) 10 D-RORC EDM D-RORC LDC LDC 10 HLT LDC Group of sub-detectors Event Building Network Event Automation of atomic operations (configuration, calibration) DA GDC TDSM Automation of global File 120 DDLs 360 DDLs 430 D-RORC TTC 30 GDC 75 10 TDSM 30 planning. DQM 20 DA/DQM 60 Central. Storage Network system configuration tool 25 TDS 75 14/05/2009 Vasco Chibante Barroso – ALICE DAQ DSS 18 DSS Archiving on Tape in the Computing Centre (Meyrin) PDS 31/35

Run Configuration Tool Data-taking Configuration Run Coordinator Trigger Configuration Time Period Sub-detectors Trigger 10: Run Configuration Tool Data-taking Configuration Run Coordinator Trigger Configuration Time Period Sub-detectors Trigger 10: 00 – 12: 00 - 06: 00 ALICE (sub-detectors, online systems) 14/05/2009 All ITS, TPC, V 0, TRD TOF => TRD 22: 00 – 08: 00 Muon Detectors MUON_TRG … … … … … Vasco Chibante Barroso – ALICE DAQ SPD 32/35

Planning for 2009 -2010 LHC Startup 2008 2009 LHC Shutdown 2009 2010 Dec Jan Planning for 2009 -2010 LHC Startup 2008 2009 LHC Shutdown 2009 2010 Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar. . . 4 th global period Installation & Upgrade Standalone tests 24/7 operation 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 33/35

Conclusion ALICE became a reality after almost 15 years of design and installation Commissioning Conclusion ALICE became a reality after almost 15 years of design and installation Commissioning of sub-detectors and online systems lasted from Dec ‘ 07 to Sep ‘ 08. Work intensive! Online systems contributed to the sub-detector commissioning, alignment and calibration Experiment was ready to start with beam in Sep ‘ 08 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 34/35

Ready again this year! 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 35/35 Ready again this year! 14/05/2009 Vasco Chibante Barroso – ALICE DAQ 35/35

Commissioning: Session I December 2007 Global runs in 2 weeks 14/05/2009 14 detectors participating Commissioning: Session I December 2007 Global runs in 2 weeks 14/05/2009 14 detectors participating 10 -60 hours of data taking – 1 -20 x 106 triggers Vasco Chibante Barroso – ALICE DAQ 36/35

Commissioning: Session II February/March 2008 Global runs in 5 weeks 14/05/2009 13 detectors participating Commissioning: Session II February/March 2008 Global runs in 5 weeks 14/05/2009 13 detectors participating 60 -150 hours of data taking – 2 -50 x 106 triggers Vasco Chibante Barroso – ALICE DAQ 37/35

Commissioning: Session III May/October 2008 Global runs in 23 weeks 14/05/2009 16 detectors participating Commissioning: Session III May/October 2008 Global runs in 23 weeks 14/05/2009 16 detectors participating 60 -1250 hours of data taking – 5 -3500 x 10 6 triggers Vasco Chibante Barroso – ALICE DAQ 38/35