[Hps] [EXTERNAL] 2021 Event Skimming

[Graf, Norman A.]

Dear Colleagues,

As we discussed at the collaboration meeting, we would like to start skimming selected events from the 2021 run based on their triggers. Since this will involve staging roughly 1PB of data and processing all the files we would like to include all the triggers that we envision being needed for calibration or other purposes, while still keeping the resulting skimmed files to a reasonably small fraction of the data. We currently plan to skim the following triggers:

00 Moller Top
01 Moller PDE Top
04 Moller Bottom
05 Moller PDE Bottom
09 Moller pair
11 Pair-3 (mu+mu-)
18 FEE Top
19 FEE Bottom

This is expected to be roughly 5% of the data and will be used primarily for calibration purposes.

Please let us know right away if a trigger that you need is being overlooked in this list as we would like to begin this process as soon as possible.

For reference, here is a screenshot from one of our later production runs at 3.7GeV:

https://logbooks.jlab.org/files/styles/plentybig/public/2021/11/3935946/clonsl1_20211102_100806.gif

Thank you,
Norman
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