[Halla_running] [New Logentry] Status update

[sanghwa at jlab.org]

Logentry Text:
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Wien flip was completed (FLIP-RIGHT -> FLIP-LEFT) yesterday and followed by Mott measurements (https://logbooks.jlab.org/entry/3722564) and PQB check (https://logbooks.jlab.org/entry/3722609) during swing shift. MCC started setting up beam to halls near the end of swing shift (interrupted by thunderstorm), first to Hall B. We decided to take straight through beam whenever it's available during owl shift, and got high current beam to Hall A in the middle of owl shift. 

When the beam was back to Hall A, we did harp scan to check spot size at the target, and found that the spot size is too small at the target (https://logbooks.jlab.org/entry/3722814). MCC adjusted 1C07 and gave us a reasonable spot size, but it seems to hurt beam profile at the Compton as we saw from Compton bg rates even though it was straight through beam (https://logbooks.jlab.org/entry/3722914).
Yves will come in and work on our beamline. In the meantime, the Hall B and A separation has some trouble and MCC will investigate.


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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/3722927
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