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The timing between laser and electron beam is monitored and kept constant by a High Level Application (HLA). This is not the application described above (the one above synchronizes all our lasers in S20, nothing to do with the electron beam). The HLA is an application that is common to all laser + electron/x-ray synchronization across SLAC.
This confluence entry was written 6/10/22. The system will change slightly in the next few months so this will need to be updated. If you're reading this and it is later than 9/1/2022 then it could be out of date. Talk to Brendan.
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When I change the target time the counter time changes, but by the wrong amount
In this means Or the two have a constant offset that is greater than 0.1 ns. (The script does way better than 0.1 ns synchronization, but doesn't display this on the counter time.) Either of these mean the HLA has lost calibration. To recalibrate:
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