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Detector DAQ Issues

Detector DAQ Issues. Jean-Sebastien Graulich, Geneva. Achievements Since CM25 DAQ System Upgrade Luminosity Monitors Sequels of the CAMAC crate incident Event Building Schedule Milestones Summary. Achievements since CM24. DAQ system upgrade is ready

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Detector DAQ Issues

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  1. Detector DAQ Issues Jean-Sebastien Graulich, Geneva • Achievements Since CM25 • DAQ System Upgrade • Luminosity Monitors • Sequels of the CAMAC crate incident • Event Building • Schedule Milestones • Summary Jean-Sebastien Graulich

  2. Achievements since CM24 • DAQ system upgrade is ready • Luminosity monitors integrated • Trigger system cabling optimized • DAQ and Trigger System Consolidation • Cabling documentation in progress • Progress in EMR front-end electronics Jean-Sebastien Graulich

  3. DAQ System Upgrade • Upgrade was needed for • Standard Operating System on all Online PC • Stable Software Behaviour • Controlled Installation/Replacement Procedure • User Friendly • DATE Software update • Better Memory management allowing larger buffers -> Increase the number of events per spill • Delicate operation • No service interruption allowed • Need rapid back up procedure in case of problem • Detailed documentation mandatory Jean-Sebastien Graulich

  4. DAQ System Upgrade • Plan of action • Backup a disk image of the working PCs • Develop the upgrade procedure on a mirror system • Develop scripts for automatic OS and Software installation • Test the DAQ on the mirror system • Apply the installation procedure to the working PCs • Status • New system tested successfully • Detailed installation documentation available • Waiting for the next shutdown for the final migration Jean-Sebastien Graulich

  5. DAQ System Consolidation • A common Online software repository has been Set-up (James Leaver) • Using Bazaar • All the DAQ software is now securely backed up and properly versioned • The online monitoring code will follow soon • A stable Installation procedure for DATE and DAQ code is now available and documented • Strong basis for coming development • Tracker DAQ !!! Jean-Sebastien Graulich

  6. Luminosity Monitor Counters • 3 LMC Signals recorded in the VME scaler • 1-2 Coincidence • 3-4 Coincidence • 1-2-3-4 coincidence • Required a reorganization of the Trigger NIM electronics • No time is recorded ! • Also shown on the TV monitor(new channel mapping) Soler’s Signals ECL Conversion before VME Scaler Jean-Sebastien Graulich

  7. The CAMAC Crate Incident • The Incident • In December 2009, after TOF2 installation, the power supply for the CAMAC crate holding TOF Discriminator failed (over current) • The diagnostic of the failure was not simple • After unsuccessful replacement of thePower supply and the fan tray, it wasdecided to replace the full crate => Re-cabling of all the boards ! Jean-Sebastien Graulich

  8. The CAMAC Crate Incident • The Consequence • Half of the ECL cables re-plugged in reverse polarity • Christmas Run cancelled • The Sequels • All boards and cables properly labeled • New cables prepared to avoid single pair connections • A new CAMAC board has been designed and produced to simplify the layout and reduce the current • Detailed layout and cabling drawing under way Jean-Sebastien Graulich

  9. New CAMAC module • Function • Distribute the Part. Trigger and the Part. Trg. Request signal to all the TDCs (Synchronization reference) • Was • A combination of • NIM Fan out • NIM to ECL converter • Issue • Messy cabling • Current consumption • Will be • A single CAMAC board made in UNIGE • After shutdown (will modify timing -> Calibration) Jean-Sebastien Graulich

  10. Event Building • The synchronization problem between the two crates persists • We incriminate the PCI/VME interface • It couldn’t be replaced because • all the spares used for the mirror DAQ system • Massive failure of boards: 4 out of 10 boards had to be send for repair • In the meanwhile • Online monitoring histogram allow to spot the problem • A VME and PC power cycle solve it temporarily • Shifter’s attention is required Jean-Sebastien Graulich

  11. Schedule Milestones • From CM25 • CAM data in Online Data Stream Nov 09 -> Mai 10 • Tracker integrated in DAQ and OLM Jan 10 -> July 10 • TOF TDC Clock Synchronization March 10 -> Aug 10 • More complicated than first thought. Need a dedicated board • Burst Gate Signal in the Trigger System Need support here ------------------------------------- The priority has been set to the DAQ and Trigger system upgrade and consolidation • DAQ System upgrade Mai 10 • Production of SW/EMR Front End Electronics Jan 10 -> Started Jean-Sebastien Graulich

  12. Summary • DAQ System upgrade ready • Migration scheduled for the next shutdown • Luminosity monitor Counters integrated into the DAQ • Significant effort in consolidation and documentation • Next steps • Interface with CAM • Tracker readout Jean-Sebastien Graulich

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