[Halla_running] [Revised Logentry] Status update

[sanghwa at jlab.org]

Logentry Text:
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We are currently in controlled access due to a vacuum incident that happened around 7:45 am this morning during the high current commissioning. Experts are investigating in the hall as well as pumping it down. Recovery is progressing well.
 Once things get back to normal, we are planning to try Compton commissioning (sending beam thru the chicane) and resume the run plan after that. 

We proceeded our low current commissioning and high current plan throughout the night until the vacuum problem happened. We were able to receive up to 50uA upon request. Detector alignment, raster size verification, SAM shutter test were completed. After the shutter test, we had controlled access to remove the shutter, and the detector has been set to intergrate mode.
See the run plan: https://prex.jlab.org/wiki/index.php/Detailed_High_current_plan

Work in the hall:
- Vacuum recovery 
- Collimator water flowmeter check: (https://logbooks.jlab.org/entry/3695854, -> https://logbooks.jlab.org/entry/3695955)

Note for the shift crew:
- New raster size for the production: MCC unit 6 (width) x 7.2 (height)
- Please do the Shift Checklist at the beginning of the shift
- Please make a separate logbook entry for changes/events during the shift when it happens

We will discuss the status and plan at the daily experiment meeting at 3:30 (2nd floor counting house conference room)
Bluejeans Meeting ID: 256 205 934 (Direct link: https://bluejeans.com/256205934)


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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/3695967
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