[Halla_running] [New Logentry] RC Daily Update

[shujie at jlab.org]

Logentry Text:
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Run Summary:
We collected more than 16 hours of Tritium data since yesterday morning. 

MCC:
The beam quality is in general good. But there are several things ( 2L13 power supply belt making noise, 2L24-6 unstable phase, 5 pass horizontal separator) MCC wanted to check/fix today so that they can deliver good beam  over the weekend. Decision is made to move the scheduled Monday system recovery to today. The beam will be taken away from noon for 2-4 hours, allowing MCC to address the above issues and also move the spot so they don't need to do it on Monday.

Hall:
Last night the shift worker noticed that the CO2 gas shed pressure went low. Jessie was contacted and he told us the control system will automatically switch to a new bottle of gas so it is fine. (https://logbooks.jlab.org/entry/3626410). For the future reference, the gas pressure will drop over time and eventually switch to a new bottle on its own, the actual turning point depends on the temperature and many other factors. Only time we need to worry is when the pressure didn't going down smoothly ( in the scale of hours) but stay at around zero for more than one hour.

Plan:
Continue taking Tritium data when the beam is available. No scheduled hall access at this moment. Please let me know if anyone wants to take an access in the afternoon. 

 

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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/3626555
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