[Hallb-engineering] [New Logentry] Follow-up Re: Follow-up Re: Solenoid Power-up

[kashy at jlab.org]

Logentry Text:
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Solenoid is cold and full but was not stable. I found that PT8620 and LL8620DP (differential pressure helium level probe) were oscillating wildly. I put in two oscillation dampers on this like I did on the 8670 units and on the Torus. This helpped immensley. See screenshots.

Average coil temperature is 37K. PT8111 has the same issue with very unstable pressure indication but this is not causing a control issue at present. I do have additional dampers made so I can install one here if needed too.




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