Here the bruco coherence tables over all ENV channels for tonight lock with 98% dark fringe and DARM on B1p:
- broader resolution (0.5Hz) up to 1000Hz: https://scientists.virgo-gw.eu/DataAnalysis/bruco/2017-02-17/LSC_DARM_1171332918/
- narrower resolution (0.1Hz) up to 100Hz: https://scientists.virgo-gw.eu/DataAnalysis/bruco/2017-02-17/LSC_DARM_1171332918-HighRes/
Some insights:
- the big structures (31 Hz bump, intense narrow lines at 54.1Hz, 67.1Hz, 87.1Hz) have NO coherence at all with ENV channels
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the most evident ENV noise is the 1Hz comb:
- most coherent channels are (in decreasing order) CEB magnetometer, UPS voltage sniffers, and IPS sniffers: Figure 1: MAG, UPS, and IPS
- from 10Hz to 30Hz some coherence is present also with NEB and WEB UPS voltage (we might suspect something from the cryotrap heater...) Figures 2 and 3.
- 6Hz peak is coherent with CEB SEISM and Acoustic (Figure 4)
- 7-10Hz region has some seismic coherence with CEB hall, a bit stronger with EIB bench (fig. 5)
- 16.9 Hz seismic line, mostly coherent with TCS WI bench (Figure 6)
- 24.6 and 24.8 Hz sesmic lines look mostly coherent with EIB and IB (is there some vacuum pump still on there?) Figure 7
- 28.9 and 31.5 Hz (small) seismic lines are coherenc with CEB SEISM and Acoustic
- there are pronounced 50Hz sidebands (48.3, 48.7, 51.3, 51.6 Hz) coherent with CEB magnetometer
- 200-300Hz some coherence with CEB seism. (Figure 9)
