[Halla_running] [New Logentry] Hall A status

[sanghwa at jlab.org]

Logentry Text:
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Ca40 and Ca48 targets were reinstalled yesterday afternoon. The targets now have W collimator added which will act as additional safety layer by increasing sensitivity to target ion chamber response to protect our target. This reduces the diameter of the Ca target area from 9.4mm to 9 mm. Details of the new target will be posted soon by Dave Meekins.

We will remain in controlled access to support the target cooldown and walk-through training. Once the target is ready, we will lockup the hall and work with MCC to restore the beam. The Run plan and safety procedure were reviewed this morning with MCC. See the current run plan from: https://prex.jlab.org/wiki/index.php/PostTargetRecoveryRunPlan

While we are restoring the beam and commissioning the target, Hall C will take the Moller measurement (spin dance) which is expected to take 4-5 hours.

Hall A moller measurement is scheduled on Sunday (starting from 7am) for two shifts. 

Shift information:
- We will be fully staffed from the swing shift today. Day TO is expected to be show up once the target is cool. Day and Swing shifters have been informed. 
- Need analysis shifters, especially owl and later this week: https://docs.google.com/spreadsheets/d/1XL5UY-VVrMkUwjbNzQ7xb6f4rYyqHwUpd034jckEjq0/edit#gid=662941510

Other work performed in the hall:
- Both US and DS detectors and AT are in counting mode
- Jack had RQ2 and RQ3 up over night for stability monitoring. They are good to go. All magnets are down currently down for the target cooldown.


As a reminder, we will have a daily RC meeting at 3:15 (2nd floor CH meeting room) and discuss the status and plan.
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/3768970
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