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Reports until 16:31, Tuesday 02 May 2017
H1 ISC (AOS, DetChar)
sheila.dwyer@LIGO.ORG - posted 16:31, Tuesday 02 May 2017 - last comment - 17:01, Tuesday 02 May 2017(35984)
Bruco, ETMX oplev and jitter coupling

Here is a link to a BRUCO scan that Evan G and I ran today on just a minute of data.  

Below 30 Hz DHARD Y is dominating, we could try adding more aggressive cut offs as Brett Shapiro has noted and as we did a few weeks ago for CHARD.  

From 30-60 Hz we have coherence with ETMX oplev sum.  Looking at the summary pages you can see that ETMX oplev is glitching.  Taking a longer coherence measurement, I don't see coherence with the oplev, but this just might be a result of the glitching causing momentary problems in DARM. Maybe we shoudl think about unplugging oplevs unless we think that it will get easier to prevent the glitching.  

At higher frequencies, our jitter coupling has gotten worse as noted before in the last two weeks. IMC WFS P  PSL bullseye

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keita.kawabe@LIGO.ORG - 17:01, Tuesday 02 May 2017 (35985)

Jitter coupling is back to pre-O2 level, attached is the coherence between DARM and IMC WFS DC from last evening. Even at 60Hz the coherence is still about ~0.1.

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