[Dsg-hallbgas] micromega gas mix pressures

[Marc McMullen]

Hi Morgan, 

Just for clarification, please contact the MVT group and ask them to check to see if their settings are appropriate. Our system will continue to supply the gas as long as it is requested, so the tank pressure will not decrease. 

Thanks, 


Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "Marc McMullen" <mcmullen at jlab.org> 
To: "Morgan Cook" <mcookiv at jlab.org> 
Cc: dsg-hallbgas at jlab.org, dsg-mvt at jlab.org 
Sent: Wednesday, May 16, 2018 8:58:56 AM 
Subject: Re: [Dsg-hallbgas] micromega gas mix pressures 

Hi Morgan, 

It looks like there is some issue downstream of the mixing system. The signals used to supply gas to the barrel (B_DET_BMT_GAS_WANTGAS) is still set to supply the gas. But the pressure in the tank is at 20psi which is the interlock set point to flow 0 gas. So that pressure is too high. I am not sure if the MVT is trying to flow to the barrel on their end or not, but if they need flow some pressure has to be relieved. They either have to flow more gas down stream of tank or relieve the tank. 

The signals for the MVT forward tracker and the FTT are set so they will not request gas. 





Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "Morgan Cook" <mcookiv at jlab.org> 
To: dsg-hallbgas at jlab.org 
Sent: Wednesday, May 16, 2018 8:22:53 AM 
Subject: [Dsg-hallbgas] micromega gas mix pressures 

Hi, 

Is there any particular reason why the Mix2_Press is twice it's 2 week average pressure and the Mix1_Press is running at 1/2 it's 2 week average? 
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