1 / 16

Summary of Data Handling Meeting: DAQ and Controls

Summary of Data Handling Meeting: DAQ and Controls. LHCb Plenary Meeting 17 September 1998 Beat Jost Cern/EP. Contents. Introduction Summary of DAQ activities Readout Unit Project Event Building Project TFC Project Event Filter Farm Controls. LHC-B Detector. Data rates.

jemma
Download Presentation

Summary of Data Handling Meeting: DAQ and Controls

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Summary of Data Handling Meeting:DAQ and Controls LHCb Plenary Meeting 17 September 1998 Beat Jost Cern/EP

  2. Contents • Introduction • Summary of DAQ activities • Readout Unit Project • Event Building Project • TFC Project • Event Filter Farm • Controls

  3. LHC-B Detector Data rates VDET TRACK ECAL HCAL MUON RICH 40 MHz Level 0 Trigger 40 TB/s 1 MHz Front-End Electronics Timing & Fast Control L0 Fixed latency 3.2 ms 1 TB/s 40 kHz L1 Level 1 Trigger Front-End Multiplexers (FEM) 1 MHz LAN Front End Links Variable latency <256 ms 4 GB/s RU RU RU Read-out units (RU) Read-out Network (RN) 2-4 GB/s CPU CPU CPU CPU Trigger Level 2 & 3 Event Filter SFC SFC Sub-Farm Controllers (SFC) Variable latency L2 ~10 ms L3 ~200 ms Control & Monitoring Storage 20 MB/s Introduction:DAQ Architecture

  4. Introduction:Hardware Components • Hardware Components • Timing and Fast Control (TFC) • Front-End Multiplexers (FEM) • Readout Units (RU) • Event Building Network • Sub-Farm Controllers • Filter Farm }Event Building Strategy

  5. Readout Unit Project • Architecture

  6. Readout Unit • Input Stage blowup

  7. 32 Bits 32 Bits Event Number Event Number Event Number Data Size Data Size Data Size Data 1 Source Id Source Id Source Id Data 2 Data 1 Data 1 ... Data 2 Data 2 Data n ... ... Data 1 Data n Data m Data 2 Status CRC Status CRC Status CRC ... Data m Readout Unit • Data Formats • It is assumed that the data is self-describing

  8. Event-Building Project • Aim is to devise an event building strategy for LHCb • Activities • Evaluation of Myrinet • 2 PCI Interfaces and one switch ordered • Material received • 2 PCs ordered • 1 received • Modeling of Myrinet (Finnish Students) • Reproduced Results (obtained using Ptolemy) with Foresight • Small systems (4x4) for the time being • Other technologies will also be evaluated if necessary

  9. Timing and Fast Control (TFC) • Technical note in preparation (ready end of the month?) • General Architecture • Readout Supervisor Block Diagram We need to find manpower to put into the TFC sub-system

  10. General TFC Architecture

  11. Readout Supervisor Block Diagram

  12. Event Filter Farm • Common project between LHC experiments being set up • LHCb participation is currently very minor (~0), we are just following the activities. More active participation would probably be welcome….

  13. Controls • Joint Project between LHC Experiments and IT/CO • Finished or currently active of sub-projects • Technology Market Survey of available commercial Control Systems • Supervisory Control And Data Acquisition (SCADA) tools • Choice of Test Stand facilities for in-depth evaluation • Architecture Design for Experiment Control Systems (including DAQ Controls) • Level 3 Alarm Transmission at CERN • Small Hands-On Projects • ATLAS TRT gas system test setup : WAGO + I/O modules via Profibus • ALICE HPMID Cooling System: Siemens PLCs and Bridgeview • CANbus evaluation (especially in view of preferences inside Atlas - LMBs) • Eye on Fieldbuses in General • Continuing Study of Use of PLCs (contacts with Working group on PLCs, which has issued recommandations for 3 brands of PLCs for CERN)

  14. Controls • Identified future sub-projects • Standardization of High Voltage Controls • Evaluation of the OPC (OLE for Process Control) Standard • Feasibility Study for ComponentWare • Magnet Controls • Rack Controls • Communication with LHC • pre-alarms (things leading to emergencies) • environment parameters (temperatures, leaks, opacity (=smoke),…) • machine parameters

  15. Controls • General State of Health of Joint Project • Project is gaining momentum and real work is being done. Cause for (guarded) optimism that a joint Control System can be done. • What is required from the LHCb collaboration? • Quite some experience from LEP experiments available in the JCOP project, so the standard control questions for an LHC exp. well answered. The URD that was produced for ALICE/LHCb serves as a basis. • BUT: in case of specific control needs or specific hardware equipment that you expect to use, please keep in contact with Pere or Wolfgang. Please do NOT postpone this issue until later … and later… • and…any participation in joint project and its sub-projects very welcome

  16. Conclusion • DAQ Hardware • good progress in RU project • starting activity on event building • need manpower for TFC • more participation in Filter Farm project welcome • Software, I.e. Controls • Joint project seems to be in good shape • LHCb involved in a number of sub-projects • new sub-projects being launched • external participation welcome • Plan to organize a DAQ/Controls Workshop in near future

More Related