Online Integration Outline for May 2008

• Overview of online systems
  • scope of online effort
  • trigger and data rates
  • number of detector channels, front-end boards, HV and LV channels, crates, hardware controls channels, monitoring hist, computers, network connections, etc.
  • planning for two-person shifts

• Foundations
  • software
    • cMsg pub/sub interprocess communication system
    • ET system
    • CODA DAQ toolkit
    • EVIO data system
  • hardware
    • commercial and JLab front-end electronics
    • JLab trigger hardware (mostly)
    • commercial hv and lv systems, crates, sensors and actuators, PLC's, computers, networking hardware, etc.

• Trigger/DAQ
  • overall trigger
  • adapting CODA toolkit to Hall D
  • implementation plans for low luminosity prototype farm
  • event transfer to silo
  • scaling to high luminosity and full L3 farm

• Controls
  • slow controls
    • architecture - 3-tier, functional view vs implementation view
    • strategy - control loops, PLC usage, CAN, I2C, SNMP, OPC, etc.
    • component choices (tentative)
    • interoperability with accelerator control system
  • experiment controls
    • run control using AFECS, inclusion of non-CODA components
    • generic high-level state machines

• Monitoring
  • detector
    • via slow controls system
    • via data stream when running
  • event data quality - via (prototype) farm
  • archive/display system - MonAlisa, other possibilities
  • event display

• Alarm system
  • design goals
  • epics, LASER, cMsg/CLAS, A-B, others

• Misc
  • networking
  • databases - MySQL or PostgeSQL
  • run and shift bookkeeping
  • e-log - CLAS, CRL or other public domain, write one yet again, etc.