[dsg-hallb_gas] Fw: AHDC gas control

[Marc Mcmullen]

Hi Bob, I’m out sick. So I’m forwarding this tho the group. Brian can probably look into it.

Also I looked and the input flow to MFC 308 is set to 20 sccm. Maybe change that to 167 sccm.

Marc

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________________________________
From: Bob Miller <rmiller at jlab.org>
Sent: Wednesday, January 15, 2025 11:20 AM
To: Armstrong, Whitney R. <warmstrong at anl.gov>; Marc Mcmullen <mcmullen at jlab.org>
Subject: Re: AHDC gas control

Hi Whitney,

I will refer this question to Marc, as he wrote the controls.



Bob Miller
Hall B Lead Engineer
(757) 822-9586
________________________________
From: Armstrong, Whitney R. <warmstrong at anl.gov>
Sent: Wednesday, January 15, 2025 10:44 AM
To: Bob Miller <rmiller at jlab.org>
Subject: [EXTERNAL] AHDC gas control

Hi Bob,

I have a question about the gas control system. When the alert gas set point is set to 90 mbar, what is that relative to in order to provide stable absolute pressure?

Also, the ambient pressure readout appears to not change and is at a value of 1017.54.

Thanks,
Whit

Whitney Armstrong
Assistant Physicist
Physics Division
Building 203

Argonne National Laboratory
9700 S. Cass Ave. | Argonne, IL 60439
630-252-5112 | 717-341-1080 mobile
warmstrong at anl.gov
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