Trigger/DAQ/Monitoring/Controls

Scope of DAQ/Online/Controls Effort

The responsibility of the Online Working Group (OWG) includes all aspects of running the experiment and taking data, as well as diagnosis of all problems that occur during data taking. Of course installation and repair of detector hardware is the responsibility of the individual detector groups. But control and monitoring of all detector hardware by shift personnel is the responsibility of the OWG.

Note that it is very important that every aspect of the experiment seen by shift personnel fall under the purview of the OWG. This is the only way to ensure that the operator environment is as simple and consistent as possible.

The OWG will review all controls software components developed by detector groups for compatibility with the overall control system. Such components may need to be modified to be compatible. Systems used only by experts need not be reviewed, although compatibility with the rest of the system is desirable. Similarly, controls hardware must be compatible with the overall experiment and slow controls systems. Every effort will be made to be as open to different types of hardware as possible.

Briefly, the OWG is responsible for: trigger and front-end programming, configuration, and control; all aspects of data taking; L3 trigger and farm system (n.b. L3 algorithm will come from the Offline Working Group); data transfer and storage on the silo; run management and control; online bookkeeping and electronic logbooks; all computers, networking, and telecom in the hall, tagger hall, and counting house; experiment and slow controls; alarm systems; archiving and display of controls data; event monitoring and display; counting house physical environment; etc.

Meetings

• Agendas and Minutes

Online Subsystems

• Experiment control
• L1 Trigger
• DAQ
• Level 3 trigger
• Event monitoring
• Event I/O
• Slow controls
• Electronic logbook
• Interprocess communication
• Alarm system
• Online databases
• Level 3 farm management
• Computer and process management/monitoring
• Raid and silo management
• Counting house management

Misc links

• BCAL06 test electronic logbook: GlueX E-Log

Other Groups Relevant to the Online Effort

• GlueX Electronics Working Group
• GlueX trigger group (perhaps this should be a subgroup of the Electronics or Online working groups?)
• GlueX Offline Software Working Group (L3 trigger algorithm)
• JLab DAQ Group (trigger hardware, DAQ system, run and experiment control, inter-process communication, L3 farm management, I/O package, etc.)
• JLab Electronics Group (trigger and DAQ hardware)
• JLab Computer Center (data transfer to silo, help manage computer and network systems, etc.)
• CNU (L1 Trigger)