[Halla_running] [Revised Logentry] Status update

[sanghwa at jlab.org]

Logentry Text:
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Hall B beam was successfully restored this afternoon, and we got beam back around 6pm. No change was made to injector and won't be made as Hall B is happy now (and we are happy, all happy).

When we got beam back, we checked 1H00 spot size just to be safe (there was no change made to Hall A today), and it was same as yesterday. First production run was taken without FFB for quickly checking our data while MCC was finishing up the Hall B set up. Also checked charge asymmetry width in the injector line, and they look ok.

FFB was turned on during the second production run (#4497) and will keep it running. The detector width looks good from the prompt analysis for recent runs. A quick scan of 1P02B position performed to optimize the Compton background rates (during run 4498), we decided to run as it is. BG rates (DS) are 4-4.5kHz now.

So, plan for tonight and rest of the weekend: Let electrons keep hitting Pb!


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