NOvA » NOvA Data Driven Trigger

{{>toc}}

h1. Shifter Instructions

h2. Running the Data-Driven Trigger (DDT)

*1. The DDTManager should be in the list of managers of the DAQApplicationManager:*

!ddt_daqapplicationmanager.png!

*2. The DDTManager will automatically stop and start the DDT processes when you start a run.  Here is what it should look like when everything is running fine:*

!ddtmanager_allrunning.png!

3. *If all is well, you should also see the DDT Scalars updating in the Trigger Scalars window:*

!ddt_triggerscalars.png!

4. *Note that the data-driven triggers record shorter time windows, so you will see very clean events in the Event Display.*

h2. Stopping the Trigger

*1. Click the "Stop Group" button and wait until everything is pink (not running).*

!ddtmanager_allstopped.png!

h2. Recovering a Trigger

*Occasionally a trigger process might die, so you can recover it as follows:*

*1. The overview will indicate this with a bit of pink in the Group button (Group 05 here), so double-click it to see more details:*

!ddtmanager_onestopped_overview.png!

*2. Send an email to novaddt@fnal.gov telling us which trigger process died.  For example, trigger process DDT-6-4 died here:*

!ddtmanager_onestopped.png!

*3. Right-click on the dead process and click "Start Process":*

!ddtmanager_restart.png!

*4. Everything should be green again.  You can return to the Overview by clicking on the orange "Back" button.*

!ddtmanager_allrunningagain.png!

*5. If the process dies more than twice in an hour, do not restart it again, but notify us via email.*