[Halla_running] [New Logentry] RC Report -- 02/01/23

[dhamilto at jlab.org]

Logentry Text:
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Run update:
Ellen, Andrew and Jessie were able to identify and fix the problem with the SBS dipole power supply around 11am yesterday. Many thanks to them. We then did beam checkout and went back to production at 12pm, which continued into Swing until around 8.30pm when there was an issue with the RF in the north linac. Beam was off for a couple of hours. During that time the GEM HV tripped, alerting us to an issue with the gas mix and pressure. Zeke came in and quickly diagnosed that the issue was due to a mislabeled Argon bottle. The GEMs were flushed and HV carefully brought back up around 1am. Thank to Zeke, Anu and Basitha for their help. After another beam checkout we took some good data on He3 overnight collecting just over 1 C in the last 24 hours. Thanks to the shift crews. At 6.30am beam was taken away and Hunter started EPR calibrations on the target. 

Issues:
Everything looks fine for now, including the GEMs.

Run plan:
RadCon will come around 12.30pm - 1pm for a survey. Andrew and Travis are planning to go down to the hall to check everything out before the hall is locked up around 3.30pm, then we'll get back to some serious data-taking. Rachel will take over from me as RC for the week.

Special requests:
None that I'm aware of.

Shift schedule:
There is still an open TO slot for Sunday Swing. Please sign up if you can.

Meeting:
Let's meet at 3.30pm today (upstairs in the counting house) or on zoom:
https://jlab-org.zoomgov.com/j/1619032184?pwd=aWhTVWxya1ZZQzA1K2ZPSTd2ZX...

Meeting ID: 161 903 2184
Passcode: 260715

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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/4121746
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