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Reports until 15:33, Thursday 11 July 2024
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thomas.shaffer@LIGO.ORG - posted 15:33, Thursday 11 July 2024 (79040)
Range integrand plots for our recent range swings during thermalization

Over the past week or so after we first get locked, our range starts out a bit lower than previously, then as we thermalize it will climb back to our usual 155Mpc (example). Sheila has some scripts that can compare the range integrands of different points in time (alog76935). I ran the script comparing 30 min into the July 11 0550 UTC lock and 3.5 hours into the same lock after we have thermalized. These point 20-50Hz or so as the largest area of change during that thermalization time. This is roughly what we see with our DARM BLRMS as well. Based on this frequency range we are thinking that the PRCL FF and A2L could be improved to help this, the former getting updated today (alog79035), but the we lost lock before A2L could be ran.

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Displaying report 1-1 of 1.