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Overview of the Data Acquisition Activities

Overview of the Data Acquisition Activities. G. Eckerlin DESY LCWS 2004, Paris, April 20 th 2004 Outline Introduction Some selected examples Open questions Outlook. World Wide Activities. A (personal) review of the DAQ sessions from recent workshops...

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Overview of the Data Acquisition Activities

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  1. Overview of the Data Acquisition Activities G. Eckerlin DESY LCWS 2004, Paris, April 20th 2004 Outline Introduction Some selected examples Open questions Outlook

  2. World Wide Activities A (personal) review of the DAQ sessions from recent workshops... 4th ECFA/DESY workshop Amsterdam/Netherlands Apr. 2003 Cornell Linear Collider Workshop Ithaka/USA Jul. 2003 1st ECFA Study workshop Montpellier/France Nov. 2003 and selected topics of the detector and machine sessions from Asian Linear Collider Workshop Mumbai/India Dec. 2003 ALCPG 2004 Winter Workshop SLAC/USA Jan. 2004

  3. A short reminder... The conditions The software trigger concept The basic structure

  4. The Conditions at the LC Physics Rate : e+ e- X 0.0002/BX e+ e- e+ e- X  0.7/BX e+ e- pair background : VXD inner layer1000 hits/BX TPC 15tracks/BX -> Background is dominating the rates ! The LC is a pulsed machine repetitian rate 5 (120) Hz bunches per train 2820 (192) bunch separation 337 (1.4) ns train lenth 950 (0.26) s train separation 199 (8.3) ms -> long time between trains (short between pulses)

  5. Data Acquisition Concept up to 1 ms active pipeline (full train), no trigger interrupt, sparcification/cluster finding at FE readout between trains (8-200ms) software event selection using full information of a complete train 'bunch of interesst'

  6. Some selected topics Silicon Detector R&D (see talk from Joel Goldstein) Gas Tracking R&D (see talk from Paul Colas) Calorimeter R&D (see talk from Paul Dauncey) Background Accelerator DAQ

  7. Silicon Strip Front End Readout 512 channels/ladder Aurore Savoy-Navarro Amsterdam 2003 2560 channels/drawer A/D=0.35µtechno, 8 bits 1MHz clock, 1.2mW Main concern: low noise and sparing power dissipation at each corner of on-detector electronics

  8. TPC Test DAQ systems (some foil courtesy Nabil Ghodbane) Ron Settles Conrnell 2003

  9. TPC DAQ Future ? Ron Settles Conrnell 2003

  10. Calice Test DAQ system Volker Korbel Montpellier 2003 CALICE UK group, P. Dauncey ~ 3m analogue RO APD fibre masks or flat-band connector to Si-PM cassette RO printed circuit

  11. Detector Per bunch R. O. Eff#B Occupancy Comment VXD-L1 36E-3/mm2 50 μs 148 5.3/ mm2 1.5cm, 4T VXD-L2 3.1E-3/mm2 250 μs 742 2.3/ mm2 2.6cm, 4T TPC 1336, 5trks 55 μs 160 Few per mil Barrel ECAL 1176, 0.63GeV 150 ns 1 0.63 GeV 101>3MeV Endcap ECAL 1176, 1.29GeV 150 ns 1 1.29 GeV 91>3MeV VXD-L1 38E-3/mm2 8 ms 192 7.2/ mm2 1.2cm, 3T VXD-L2 3.1E-3/mm2 8 ms 192 0.6/ mm2 2.4cm, 3T TPC 1377, ?trks 8 ms 192 “Few per mil” Needs Study Barrel ECAL 547, 0.73 GeV 8 ms 192 139 GeV Needs Study Endcap ECAL 597, 0.9 GeV 8 ms 192 171 GeV Needs Study Detector Occupanciesfrom e+e- Pairs @ 500 GeVfcn(bunch structure, integration time) Tom Markiewicz Conrnell 2003 TESLA NLC

  12. Accelerator Data Acquisition NLC Data Collection Marty Breitenbach Conrnell 2003 • There are ~11K accelerator sections and 1K BPM’s. • Data per bunch (Not train, debatable if needed) • BPM X,Y,I – 2 bytes each + 10 bytes stuff = 16 bytes • Acc Section - 2 positions + FE + RE + phase @ 2 bytes + 20 bytes stuff = 30 bytes • 200 bunches/train * 120 trains/sec = ~20000 bunch/sec • Data Rate = 20000*(11K*30+1K*16)=7 Gbytes/sec • Should not be worse than 10 for the whole machine!! • Begins to look like a distributed detector data acquisition problem. Some data compression will be needed. • Rapid access and analysis of this data may be a fun problem.

  13. Many more on DAQ Many more presented in detector and machine sessions This were just a few examples and should underline : Data acquisition issue are addressed in many R&D groups Data acquisition starts at the frond end Be encouraged to show your R&D work in the DAQ sessions !

  14. We would like to hear more about… Backgounds and occupancy Online calibration Alignement and track linking Bunch tagging Front End Control signals Power/Cooling Machine/Detector DAQ interplay

  15. Outlook Discussion on who to organize in future • Session : Wed. 21st 11:00 – 12:30 Contribute to the next Workshops ! • ALCPG LCWS (Victoria/July 04) • ECFA LCWS (Durham/Sep 04) • ACFA LCWS

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