Revision as of 07:37, 30 June 2022

Back to Run Coordination Meetings:Summer2022

Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

Thursday June 30

Overarching theme of the past 24 hours: "herding cats"

no beam during the day, machine optimization to deliver high current beam to HallC (unsuccessful)
beam back around 5:30pm
did first two Harp scans with HallD laser on and off while hallC had around 17uA of beam
- Scan One with our beam
- Scan Two only HallC beam
- Scan results at collimator
- peak to base line of the harp peaks is about 100 (as in previous scans)
- OLD harp scan from Dec 1 2021 and Dec 2 2021
general beam conditions are rather unstable. beam strip chart
continue data taking over night
DAQ issues again with life time dropping to 60%. Shift crew called Sergey.
- found problem with Slot 3 fiber 7 having trouble (I think this is seen in roctrig1?)
- after Sergey's intervention DAQ came slowly back to "normal"
beam conditions are very unstable over night
Loss of NMR comm in Tagger Manet
again very bad life time 10% only! (stopped run 100778) but also beam lost beam at the same time.
- stopping and restarting the DAQ with new run 100779 cured the issue of low lifetime, but soon beam was lost again.
beam on and off for some time, finally off with problems in several cavities one whole (1L15) zone no beam for several hours.

@@ Line 28: / Line 28: @@
 * [https://logbooks.jlab.org/entry/4009005 Loss of NMR comm in Tagger Manet ]
 * again very bad life time 10% only! (stopped run 100778) but also beam lost beam at the same time.
+** stopping and restarting the DAQ with new run 100779 cured the issue of low lifetime, but soon beam was lost again.
 * beam on and off for some time, finally off with problems in several cavities one whole (1L15) zone no beam for several hours.
 === Shift report ===
 * [https://logbooks.jlab.org/entry/4008732 day shift summary]