[Dsg-htcc] Power Outage

Marc McMullen mcmullen at jlab.org
Mon May 14 11:17:35 EDT 2018

Hi Yuri,

As you may be aware, on May 23 at 5pm the utility power will be turned 
off in Hall B, for 8 hours. DSG will be switching the Space Frame cRIO 
to clean power during the outage, so that the gas controls will not be 

Krister is handling the Hall B engineering on-call during this period. 
We do not anticipate any issues with gas control, however, Krister needs 
a contact person from the HTCC group so that he can be advised on any 
unforeseen issues that may arise from the outage.

Can you have someone contact Krister so these details can be worked out.

Additionally, if you have concerns about the outage (as far as gas 
supply is concerned), you may want to talk to Denny about having a 
rotameter installed in the place of the mass flow controller, or at 
least bypassing it. Again, we do not believe there will be any issues 
with the system during this time. But if you have questions and 
concerns, now is the time to bring them up to the Hall B 
Engineering/Mechanical group.


Marc McMullen
Detector Support Group

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