[Yokozawa, Nakano]
Thanks for the night workers, the IFO has been locked stably and got new recorde. (above 900kpc at the maximum.)
Today, the dewhitening filter of the ETMs could be engaged.
Quick noise investigation by Bruco.
1. MICH and PRCL control noise is smaller than before. If alignment is good, the effect from them became smaller.(Fig.1. and Fig.2.)
2. 206Hz. As you can see, there is coherence with CARM and some IMC channels(Fig.3.). This is just assumption, the IMC alignment may affect this peak. (Amplithde is varied everyday)
3. There is coherence with peaks near at 120Hz and 240Hz in the IMTX's and ITMY's PS signals and magnetometers. We may investigate the power supply around them.
4. I couldn't find the clear reason for 90Hz peak
Bravo! Oh... Bravo!!