[Hallc_running] [New Logentry] RC Report - 02/15/2024

yeran at jlab.org yeran at jlab.org
Thu Feb 15 10:45:01 EST 2024


Logentry Text:
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RC Report - 02/15/2024
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Yesterday was maintenance day from 6am to 9pm. Hall_C was in controlled access by 8:00am (was planned by 9:30). 

Work done at the Hall
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1)NPS calorimeter
   1.1 NPS Temperature Sensors: The NPS crystal temperatures have been recovered. The problem was with cables from terminal block #4, so the NPS folks used the spare extension cables along with the 
         manufacturers cables for terminal block#5 (which is currently not in use). https://logbooks.jlab.org/entry/4252347

   1.2 NPS Channel 20-20. The PMT and base for channel 20-20 have been replaced.  https://logbooks.jlab.org/entry/4252330, https://logbooks.jlab.org/entry/4252355 

2) Safety Walkthrough (SAF112)
3) 22GeV LDRD investigation 
4) Spectrometer Support Group (Heidi, Lars) – Visual inspection of HMS Q1 JT13, some troubleshooting work on HMS Quad magnet vacuum sensors. The main work was postponed on Friday, to 10-12am 

At 9pm HallC got beam back and started production run with kinematics KinC_x60_4b, SHMS=33.810ged, Targets used during the Swing, Owl shifts – LD2, LH2, with the beam current from 8uA – 40uA.
HarpScan performed https://logbooks.jlab.org/entry/4252488 , https://logbooks.jlab.org/entry/4252489 ,  https://logbooks.jlab.org/entry/4252512 .
Got some problem with CODA, so it has been killed coda and restarted https://logbooks.jlab.org/entry/4252537 

-----Plan for today: (02/15/2024)
Day shift: Moller (Dave) from 8:30 am to 4pm
Swing/Owl shift: Back to Production run, and continue with the kinematics KinC_x60_4a/4b

---Preliminary Plan for Friday (Julie) https://logbooks.jlab.org/entry/4252342 
7:45 beam off, then Hall survey at 8am, and we will go for Controlled Access on 9am. 

Work on NPS col 20-23 PMT/bases
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Friday AM (9-noon)
1) Move Calo 9.5m 
2) Remove col 22 and23
2) PMT survey from col 20+21 by noon (Hao suggested to start from col 23. It is easier to work with the columns closer to the middle when the space gets cramped)

Friday PM (noon -3pm)
1)	Remove col 22+23
2)	Disassemble PMT/bases col 20+21 upstairs (room 200A)
3)	PMT survey from col 22+23

Friday evening (3-7pm)
1)	Assemble PMT/bases for col 20+21 with bypassed bases upstairs

Link to 11:00 RC meeting
https://jlab-org.zoomgov.com/j/1617015555?pwd=L09IQ216dml6ZmM5ODExVjFsMX
Meeting ID: 161 701 5555
Passcode: 288953

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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/4252743
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