[Halla_running] [New Logentry] RC daily update April 22 2024

[jcaylor at jlab.org]

Logentry Text:
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Since yesterday's update, most of the day shift was spent fine tuning the SBS GEM HVs by looking at low current data on LH2 and the latency was changed - https://logbooks.jlab.org/entry/4285590

Around 8 pm GEM HV tuning was stopped and we switched to LD2 to take production data. The SBS GEMs now have efficiencies ~30 - 40 % per layer.

We started data taking at LD2 at 12.5 uA with a BBCal threshold of 1.4 GeV. This had a trigger rate of ~2300 Hz. At some time in the night the beam current was increased to 15 uA which had a DAQ rate of > 3000 Hz with a live time around 90%. 

LD2 data taking went smoothly. 

This morning we took an escorted access to insert sieve and take optics data during the day shift. That is currently ongoing.

Lets meet this afternoon at 3:30 for the RC meeting on the 2nd floor of the counting house and on zoom.

We will meet at 3:30 via zoom:

https://jlab-org.zoomgov.com/j/1616220064
Meeting ID: 161 622 0064
Passcode: 314159





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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4286237
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