[Halla_running] [New Logentry] Hall A RC Report - 5/17/25 and 5/18/25

[arunts at jlab.org]

Logentry Text:
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We were able to get back to production running at 10uA during Friday day, swing and owl shift. A short escorted access was made by Kip to recover a group of channels on ECAL NIM crate 9 which appeared to be off (https://logbooks.jlab.org/entry/4376806). We bumped up the beam current to 15 uA and took production data with occasional DAQ crashes, GEM layer trips, and persisting HCAL timing shift issues. On Saturday morning, beam was taken away from us fo about 2.5 hrs to try and recover the beam for all Halls (i.e. specifically Hall B: https://logbooks.jlab.org/entry/4377160) but that plan was unsuccessful. Beam was returned to us at around ~12:30 pm, and we continued taking production data at 15 uA until Ben Raydo implemented some VTP firmware changes (~5:00 pm) to address the HCAL timing shift issue (https://logbooks.jlab.org/entry/4377362). The implementation of these changes didn't fully address the timing shifts but shifters were given instructions to run a 50k, check the 
 timing a
 nd restart the run if necessary. We continued to take smooth production data at 15 uA during Saturday owl and Sunday day shift. Since the detectors are stable, and livetime is at ~100%, we are in the process of ramping up to 20 uA in steps on 1 uA (for 10 mins) while the GEMs are being continually monitored by experts. Let's have an RC meeting tomorrow at 1:00 pm EST to discuss more. The zoom connection details are below.

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

Trip limit adjusted for a shorted sector: https://logbooks.jlab.org/entry/4376695
Remote reboot implementation for ECAL crates: https://logbooks.jlab.org/entry/4377193
Reverted additional firmware changes by Jiwan: https://logbooks.jlab.org/entry/4377844

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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/4377987
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