Difference between revisions of "Run Planning Meeting Notes, June 30 - July 06, 2022"
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* beam conditions are very unstable over night | * beam conditions are very unstable over night | ||
* [https://logbooks.jlab.org/entry/4009005 Loss of NMR comm in Tagger Manet ] | * [https://logbooks.jlab.org/entry/4009005 Loss of NMR comm in Tagger Manet ] | ||
− | * again very bad life time 10% only! but also beam lost | + | * again very bad life time 10% only! (stopped run 100778) but also beam lost beam at the same time. |
* beam on and off for some time, finally off with problems in several cavities one whole (1L15) zone no beam for several hours. | * beam on and off for some time, finally off with problems in several cavities one whole (1L15) zone no beam for several hours. |
Revision as of 06:32, 30 June 2022
Back to Run Coordination Meetings:Summer2022
Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)
Hall D counting room white board
Thursday June 30
Past 24 hours
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)
- 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.
- beam on and off for some time, finally off with problems in several cavities one whole (1L15) zone no beam for several hours.