[Halla_running] [New Logentry] RC Update (10/21/2022)

[mnycz at jlab.org]

Sorry, I see that the 3pm RC meeting information didn't make it in the
previous email:


Time: Daily at 3:00pm
Location: Counting house conference room

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>
> Logentry Text:
> --
> After the RC meeting yesterday, we dropped to controlled access and the
> polarized target group began working to better understand the source of
> the low target polarization. They were able to have their RF amplified
> surveyed and moved upstairs which allowed them to preform EPR calibrations
> with the SBS and BB magnets on. The main take away from their work
> yesterday (early this morning) is that it appears that the polarization is
> actually closer to 30% (as opposed to ~10%)! Below is a link to a nice
> summary from Gordon detailing their work and current understanding of the
> system.
> https://logbooks.jlab.org/entry/4064670
> I wanted to thank the polarized target group for their hard work the past
> several days!
>
> After the target work was finished, OWL shift proceeded with a beam line
> and raster checkout
> https://logbooks.jlab.org/entry/4064685
> https://logbooks.jlab.org/entry/4064687
> https://logbooks.jlab.org/entry/4064690
> and then continued with production on the polarized helium-3 target.
> The plan for today and this weekend is continued polarized helium-3
> production data
>
> Yesterday Hall C performed a high current BCM calibration. To accommodate,
> we were restricted to 35 uA during OWL shift. As of day shift, our
> operational limit has been restored to 60 uA, with a limit of 45 uA on the
> polarized / reference cell targets. But there has been some beam
> instability during OWL and we could only received stable 25 uA beam during
> OWL and the beginning of DAY shift.
> https://logbooks.jlab.org/entry/4064861
> Looking forward, at the 7:45 am meeting, I brought up the desire to shift
> the reconfiguration / pass change (to 3rd pass) by one week to Monday Oct.
> 31 (previously it was scheduled for this Monday October 24). They were
> happy to accommodate this request.  If needed, we can discuss this further
> today during the 3 pm RC meeting.
> One final note, we have SL shifts open on Sunday OWL and Sunday SWING. And
> beyond this weekend, the OWL shifts from Monday (10.24) until Friday
> (10/28) need to be filled.
>
> ---
>
> 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/4065084_______________________________________________
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