[dsg-hallb_htcc] HTCC CO2 pressure

Brian Eng beng at jlab.org
Sun Dec 12 01:25:44 EST 2021


I increased it to 10 lpm: https://logbooks.jlab.org/entry/3961354

This really should have gone via the on-call first rather than through emails though.

________________________________
From: Youri Sharabian <youris at jlab.org>
Sent: Sunday, December 12, 2021 1:02 AM
To: Brian Eng <beng at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>
Cc: Bob Miller <rmiller at jlab.org>; Morgan Cook IV <mcookiv at jlab.org>
Subject: HTCC CO2 pressure

Dear Brian and Marc,

The CO2 gas pressure in the HTCC is fluctuating between 0.04 iwc to 0.09 iwc. The gas flow rate currently is 7 l/min. Usually we use 10 l/min. Please increase the flow rate on the HTCC MFC to 10 l/min.
Usually at 10 l/min we have pressure in the HTCC of about 0.14 iwc to minimize effects of atmospheric pressure changes.
Please let me know if there are any problems.
Thank you.
Regards,
                 Youri

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