david.barker@LIGO.ORG - posted 11:26, Thursday 02 January 2025 - last comment - 11:39, Thursday 02 January 2025(82084)
Thu CP1 Fill
Thu Jan 02 10:04:52 2025 INFO: Fill completed in 4min 49secs
Travis confirmed a good fill curbside. TCAmin = -50.1C, trip = -50.0C, OAT [3C, 37F]. Travis knocked some ice off the thermocouples.
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I did a linear fit of the TCA starting temp (at 09:59:00 each day) and the TCA minimum over the following 30 minutes.
Attached plot show the fit for the past 14 days, X=starting_temp, Y=min_temp.
When the starting temp goes into the positive C region, the fit becomes more linear.
Fit is:
Tmin = 1.57*Tstart - 97.87
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