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CODA 3

CODA 3. Data Acquisition for the 12 GeV Upgrade. The good news…. There is a group dedicated to development and support of data acquisition at Jefferson Lab. This includes Hall D. Much of what Hall D needs is generally useful to the whole JLAB experimental program.

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CODA 3

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  1. CODA 3 Data Acquisition for the 12 GeV Upgrade

  2. The good news… • There is a group dedicated to development and support of data acquisition at Jefferson Lab. This includes Hall D. • Much of what Hall D needs is generally useful to the whole JLAB experimental program. • We are not waiting on the 12GeV upgrade.

  3. In the short term… • Hall D Requirements drive development • Replace aging technologies • Run Control • Tcl-Based DAQ components • mSQL • Maintain cross-platform compatibility • Linux, Solaris, OS X, vxWorks • Support new commercial hardware advances

  4. HALL D Existing Halls

  5. GlueX - Requirements • Pipelined Electronics (ADC, TDC) • Dead-timeless system • 200 KHz L1 Trigger • Parallel/Staged Event Building • Up to 100 Front-end Crates • 1 GByte/s aggregate data throughput • L3 Online Farm • 200+ nodes • x10 reduction in data to disk • Storage Management • Ordering/sorting of built events (at 15-20 kHz) • 100 MB/s --> 8 TB/day --> 1 PB/year

  6. Front-End Issues • Trigger rate - 200 KHz • Block up Events (200 event block -> 2kHz) • Move some ROL runtime code to modules (FPGAs) • ADCs provide L1 trigger data ( hence we need a distributed high speed clock - 62.5 MHz ??) • New Trigger Supervisor • Perhaps 100+ crates • Support pipeline, event blocking • Manage flow control into DAQ system backend

  7. Level 1 Trigger • Distributed high speed clock • Subset of ROCs collect sampled ADC data • and send it to L1 Trigger in sync • 12 bit sums/crate x 250MHz --> 3 Gbit/s links • Trigger decision goes to Trigger Supervisor

  8. Front-End Issues cont… • Form-Factor for electronics • VME64X • New commercial bridge (TSi148) supports 300MB/s on existing VME backplanes • Support other Hall DAQ applications • High speed switched serial interconnect (4Gbit/s links) needed for GlueX L1 trigger • Commercial solutions - VXS, ATCA ? • DAQ - Trigger - Modules : All must be designed to work together.

  9. Staged/Parallel Event Building • EMU built around the ET • system for customizable • processing/distribution of • event streams. • Examples: • Data Concentrator for ROCs • Sub-Event builder • Farm distribution point • Event Recorder • User Processes can attach to • any EMU in the system

  10. L3 Farm 100 MB/s • Can be used for analysis or filtering • Support 100s of nodes • Nodes can come and go during event taking ------- • Do other experimental halls need this (Hall B)? • Do filtered events need to be time ordered? 1 GB/s

  11. RunControl / Monitoring / Slow Controls • First generation Java Agent RunControl is here • Robust fault tolerance • Process abstraction through COOL language • Integration of foreign processes • DP, vxServer, shells • EPICS, CAEN OPC coming • Move toward full integration of Slow Controls • Web Interface for remote monitoring. • Extended and customizable graphing and DAQ system monitoring capabilities • Basis for Cmsg - CODA messaging system currently under development

  12. Other Issues • Integrate existing Hall requirements into a single supportable distribution. • Transition toward Hall D requirements. • Maintain cross platform compatibility • SUN, LINUX, VxWorks • 64bit Arch - Opteron, G5 (Mac X) • Embedded Linux (on Single Board Computers) • Move to database independence • Proxy Server (JDBC) to support User’s database choice • User Hooks into the DAQ system • JAVA • Updated Tcl support • Others…??

  13. Summary • CODA version 3 is now being molded - nothing is irreversible. • Our plan is to phase in new tools to provide a smooth transition from CODA2 --> CODA 3 • Much software support for Hall D requirements are on a short term timeline (2-3 years). • Front-End (hardware) support is longer term and may go through a “revision 1” iteration for use in existing experiments.

  14. Extra slides

  15. Pipelines (Dead-timeless DAQ) 10µs “snapshot” can be stored in memory (5KB/FADC) A Trigger generates a lookback and extraction of the sampled ADC data 250MHz

  16. VME64X - VXS Interconnect 18 VME Payload Slots J0 - 200 total pins 45 differential pairs 6 GHz Bandwidth 2 Switching slots

  17. What is CODA

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