[Prex] [New Logentry] RC daily update

[tianye at jlab.org]

Logentry Text:
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Yesterday Day Shift started with trippy beam, the major downtime (~3h) is due to the MBD2C00V mismatch, and the average efficiency for yesterday Day Shift is ~35%. Amali did the Compton full gain spectrum runs with 10uA at the beginning of the swing shift. During yesterday swing shift, around 17:59 or so, 2A Energy lock turned on unexpectedly https://logbooks.jlab.org/entry/3799417,https://logbooks.jlab.org/entry/3799450, https://logbooks.jlab.org/entry/3799466. After that, MCC weren't able to deliver the full current to the Hall https://logbooks.jlab.org/entry/3799577, so we ended up with running production at 140uA for the whole night.

Accumulated charge from yesterday Day shift to today Owl shift is~ 4.7C, we are at the beginning of slug 159.

Issue: LHRS shield house temperature has been increased since yesterday 4:00am, Tech On Call (Bob) were able to change the dead batteries in the Mitsubishi AC Controller https://logbooks.jlab.org/entry/379929, https://logbooks.jlab.org/entry/3799477, but the temperature kept going after that, now it stays with 75.5 F. The electronics can live with it until Monday based on Mike's calculation: https://logbooks.jlab.org/entry/3799818.

Later this morning, crew chief were able to push Hall A current to 143uA (~95%  of desired current). Plan is to continue production with this.

We will not have the regular RC meeting today.

Ye Tian (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/3800024
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