[Sbs_gems] [New Logentry] Follow-up Re: Follow-up Re: Setting the Ar-CO2 mixing ratio to 70%-30% (with JLab system)

[chandan at jlab.org]

Logentry Text:
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The RC and GEM gas experts agreed to change the Ar content in the gas mixture of the BB GEM from 70% to 78%, and that for SBS GEM is from 70% to 73% (these are values based on the binary gas analyzer we have in the gas shed). 
Following are the voltage settings for the MFCs:

For BB: Goal -78%
Ar MFC setvoltage = 3.77 Volt.
CO2 MFC setvoltage = 2.43 Volt.
It seems from the attached strip chart that these set values gave 78% Ar content in the mixture at around 13:45.

For SBS: Goal - 73%
Ar MFC setvoltage = 3.77 Volt.
CO2 MFC setvolate = 3.10 Volt.
It seems from the attached strip chart that these set values gave 73.2% Ar content in the mixture at around 13:45.



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