Run Planning Meeting Notes, May 22 - May 28, 2025

The zoom link for the Hall D 0845 meeting is the first in this list

MCC whiteboard

Hall D counting room whiteboard

Hall D Logbook

Spreadsheet with list of runs

Back to Run Coordination Meetings:Spring2025#Runplan

Wednesday May 28

Last 24h

• 17.3 hours ABU, 2.5 hours BANU.

Reports

• Hydra failure over the weekend understood, fix implemented (Torri)
• New harp scan, original model, revised model
• source polarization flip using half-wave plate during AMO run (Richard)
• ECAL gain stability, ECAL reference PMTs (Sasha)
• Checking the tagger NMR meters (Bobby)
• Very strange scaler readings from DIRC (Hovanes)

Problems

• ROCTAGM1 needed to be power cycled to start run, logentry 4384588
• ROCTRIG2 responsible for failed daq start run, ok after daq restart logentry 4384697
• ROCFCAL4 needed to be power cycled to start run, logentry 4384701
• RC should have requested immediate stop/start of new run when half-wave plate changed (Richard)

Plans

• Opportunistic access during Beam Studies, whenever stable beam conditions not available
• Otherwise, continue running.

Tuesday May 27

Last 24h

• 19.0 hours ABU, 2.1 hours BANU.

Reports

• Ps_client restarted after PS trigger rates frozen in EPICS - (Naomi)
• Several FCAL bases non-responsive, one consistently hot
• Hydra stopped running, restarted - (Hovanes)
• Very small second timing peak "on the side" - (Beni)
• Updated reference plot for PS spectrum
• Rise in photon transmission - (Alexandre)

Problems

• Shift crew needs to be regularly reminded to watch for dropping FCAL bases
• Event viewer does not open, although required to be running on checklist
• Hall D convergence extrapolation tool needs revision - Richard
• Raw mode run on Friday seems to have very few hits, trigger issue? - Lubomir

Plans

• Check the raw mode trigger, then take a new raw mode run

Monday May 26

Last 24h

• 19.5 hours ABU, 2.3 hours BANU.

Reports

• Now 6 FCAL bases in lock-up - (Hovanes)
• Noticed irregular jumps in one ion chamber - (MCC)
• Reminder to watch for locked-up FCAL bases - (Mark)
• Current oscillations continue at +/- 5nA amplitude - (Richard)
• Reminders to check trig:rate:main - mostly false positives

Problems

• Occasional DAQ hangs (live time drops suddenly to zero) resolved by stop/start of the run.
• "Save to logbook" button in Rootspy stops working occasionally, requires restart of Rootspy.

Plans

• No immediate changes foreseen, continue to run.
• Hall A plans a Moller run mid-day, expect the half-wave plate to be swapped afterward.

Sunday May 25

Last 24h

• Sasha took the beam for 2.5 hours to study trigger rates vs size of masked zone in ECAL.
• 18 hours ABU, 3.4 hours BANU including the 2.5 hours for Sasha's trigger studies (could be disputed that this is BANU).

Reports

• Slow drift seen in coherent edge energy - (Naomi)
• Study of trigger rates vs ECAL masks radius - (Sasha)

Problems

• Only minor -- watch for drift in the coherent edge

Plans

• No immediate changes foreseen, continue to run.

Saturday May 24

Last 24h

• Beam available in Hall D starting around 1:00pm.
• Completed harps scans, 10 minutes of raw data (1.2M events) with regular trigger at 200 nA.
• Resumed production around 3:00 PM.
• Total of 11 hours of ABU over last 24 hour period, 1.5 BANU mostly due to planned configuration changes, DAQ freezing.

Reports

• Solenoid Interlock Signal: Power Loss, follow-up - (Jeorg)
• 32-ns shift between fADC and TDC times in one module R39,S3
• e-beam convergence good in y, poor in x (with large anomaly in 5C11B horizontal), but good enough to run
• Noticed 5 FCAL blocks with zero HV
• Updated references for several monitoring plots - (Reinhard)
• Missing FCAL occupancy in monitoring plots restored - (Alex)
• Coherent edge allowed to drift, shift leader reminded - (Naomi)

Problems

• Couple of times data taking frozen with Live Time = 0, recovered by restarting DAQ

Plans

• Continue production
• Sasha will take < 1hr to study trigger rates vs expanded ECAL trigger masks around beam hole

Friday May 23

Last 24h

• No beam since Wednesday maintenance period, waiting for repairs in Arc 10, etc. etc.

Reports

• Circular Polarization in rho Decays - (Alex)
• Helicity asymmetry in L1 trigger - (Mark)
• ECAL LEMO connector fixed - (Sasha)
• Recalibrated BCAL baselines - (Malte)
• Rho decay polarization - (Alex)
• One TRD "trip" - I vs V - (Lubomir)

Problems

• Need to understand reasons for decreasing coherent enhancement
• Need to fix issue with sinusoidal beam current oscillations

Plans

• When beam returns, harp scans, 10 minutes of raw mode, then back to production
• Evaluation of ECAL trigger masks

Thursday May 22

Last 24h

• No beam since shutdown for maintenance Wednesday morning 6:30 am
• Solenoid ramped down to 800A for cryo work, back at full current by 16:00
• MCC reported overtemp in Arc 10 magnet at midnight, dropped to Power Permit
• Beam to Halls A Hall-D Monitoring Plots Run 131645 and B overnight, Hall D is waiting for repairs in Arc 10

Reports

• Helicity apparently functional (Mark)
• Downstream [BCAL LED trigger is working now] (Varun)
• BCAL Discriminator thresholds scan (Mark)
• NMR probe controller test (Bobby)
• Solenoid at full field (Josh)
• Coherent peak enhancement fits to date for 2025 (Justin)
• Ongoing issue with noisy bcal fADC module, older, older, summary from Sasha, report from Justin (Sasha, Justin)
• Yield Ratio FCAL Crate3 to Crate12 (Beni)

Problems

• Need to understand and resolve issue with the noisy BCAL fADC module

Plans

• DC Power team is working on flushing magnets this morning, hoping to begin tuning beam around noon.
• When beam returns, harp scans, 10 minutes of raw mode, then back to production
• Evaluation of ECAL trigger masks