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Reports until 16:20, Wednesday 09 December 2015
H1 SEI
hugh.radkins@LIGO.ORG - posted 16:20, Wednesday 09 December 2015 (24088)
ETM ISIs Blends all on 45mHz X and Y

Jenne, Sheila, EvanH, Hugh

We had a fortuitous rapid drop in the wind speeds around 1400pdt and while not attempting to lock, it was a quick study looking at the GS13 signal while changing the blends to see that the 45 mHz were much quieter.  Of course there still is the worry about the ETMX X 45 blend ringing up MCF but we decided that if it does,maybe we can study it or try something.

The blend switch, and why we though it was a good idea given the reduced winds ad the very elevated microseism is clearly seen on the attached plot.

It still took some time to lock, maybe still a little much wind or something else.  Still we decided to not switch the ETMX X blend back fearing that it woould likely break the lock.  So for over an hour we've only had minor flare ups of MCF but it really hasn't grown and faded after just a couple cycles.

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