[Hallc_running] [New Logentry] RC update for Hall C (Mon)

mack at jlab.org mack at jlab.org
Mon Dec 2 19:05:02 EST 2019

Logentry Text:
Shifts are cancelled thru and including Wed Day.

Significant change of Hall C plans!  The lack of an alternate high power dump means Hall C needs to make hot water sooner rather than later for an RF stress test. This means we get 5 pass first, then drop to presumably 1 pass days later to complete the commissioning.  The PD has kindly updated the White Board #2 (attached for any outsiders) and I have tried to summarize the next half week in Hall C on another slide (also attached). 

 In other news, the accelerator is sending beam to D, and in principle to B.

3He Target progress gets logged in the middle of the nite so you might have missed it here:   https://logbooks.jlab.org/entry/3745666 and  https://logbooks.jlab.org/entry/3745657

In terms of Hall C infrastructure, great support today from everyone. Everything on the to-do list is at least well underway, and a few things got solidly done:  Moller cool-down has started. New FSD's on target motion and N2 cooling jet flow were connected.  The cooling jets themselves do not yet meet the flow spec, but there is a path forward. https://logbooks.jlab.org/entry/3745924 Ultra pure hydrogen for the reference cell is finally on hand.    Spectrometers got moved to their min angles. (My profound apologies to Xiaochao as this was NOT in the hclog as I claimed. I got this from Steve L by phone, and he repeated it at the Hall C meeting.) Steve L is also most of the way thru his spectrometer magnet checklist. 

Generally, there will be an RC meeting every weekday at 4:15 pm on the 2nd floor of the Counting House. I probably won't spam you with a reminder. Bluejeans link: https://bluejeans.com/861439920 .


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/3745941
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