[Prex] [New Logentry] RC update

[chandan at jlab.org]

Logentry Text:
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Dear Collaborators,

Update for last 24 hours:
TECH checked hall instruments (Magnets, vacuum, cryogenics)  when hall was in controlled access during yesterday's beam studies. Everything was okay.

Yesterday Alex worked on Compton electron detector. But no luck. So we didn't run Compton electron detector overnight. He will work on this today while Hall will be in controlled access for EasyButton hardware fix (8:30 - 13:30).

We got beam back around 19:30. Established high current beam with Carbon 1% target.
After that Amali did 10 microAmp low-current high gain Compton photon detector check.
Last night the Ca-48 target burn off took almost 25 min (https://logbooks.jlab.org/entry/3796929).
Then we continued production till 8:30 am when MCC stopped beam for scheduled work at the injector.

Last night we have started production data with BCM width ~600ppm. But it creeps up to 850ppm in the morning (https://logbooks.jlab.org/entry/3797108).

The Compton central rate at the beginning of yesterday's production was 170kHz. The compton BPM positions drifted and the central rate also drifted to 200 kHz (https://logbooks.jlab.org/entry/3797091).

We have accumulated 4.52C of good charge since yesterday's swing shift (average efficiency ~74%).
There were no major incidents for last night.

According to MCC's whiteboard, nothing is planned for next few days.
The plan is to go back to production as soon as possible.

We will have our usual meeting upstairs in the counting house at 3:15 PM today. Bluejeans link for remote participants: https://bluejeans.com/256205934

Chandan Ghosh
(Hall A Run Coordinator)


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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/3797265
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