Reports until 19:49, Thursday 27 July 2017
edmond.merilh@LIGO.ORG -
posted 19:49, Thursday 27 July 2017 (37836)
Violin modes.
- After taming the strings over a course of several hours and several failed attempts at NLN, fundamental modes dropped below the requisite level of e-15. Thanks again for the support of Dr Kissel
- HFD came on site to check the radio at MX which hadn't reported properly this afternoon
- PI modes (mode 28) were troublesome and caused one lockloss while trying to damp earlier in the shift. Later, I was having a bit more difficulty so I got Terra on phone support and ended up handling it without much intervention. Thank you Terra.
- Sudarshan and Rick are currently doing PCal cal line testing. In a little while I'll be getting a call from Sudarshan to turn off a couple of lines and turn another one back on. This will take H1 out of Observing briefly. I may take the opportunity to run a2l if necessary.
- a2l was run. A few more gain mods were made to violin mode damping and H1 is back into OBSERVING! ...and I just noticed that I'm 46 minutes late switching the Observatory mode.
- there has also been a smattering of small earthquake activity but nothing destructive for H1.