Reports until 10:29, Tuesday 17 September 2019
H1 SEI
jim.warner@LIGO.ORG - posted 10:29, Tuesday 17 September 2019 - last comment - 08:48, Wednesday 18 September 2019(51989)
HEPI work cover installed on HAM6 SE corner

The "new" HEPI work covers fit on the HEPI housings, but because of the way the hoses are run, I think all of them will need to be reworked, or we'll have to re-route some of the hoses on all the housings. Hugh looked first thing and saw that one of the horizontal actuator hydraulic lines interferes with the cover. I took one to the warehouse and notched it, took it back out and installed it on the SE corner of HAM6. Didn't even trip the ISI or HEPI.

First image is the installed cover on the pier, second image is a close-up of the notch around the hose. Hard to see, but I made sure the line isn't touching the cover.

Third plot are asds for all of the HAM6 HEPI L4Cs, for both plots green (H3/V3) are the pier I put the cover on, brown (H4/V4) are the L4Cs on the pier on the opposite end of the blue cross-beam (according to page 40 of T1000388 , fourth image, lower left cartoon). I don't see any worrying differences, but there is a lot going on in the LVEA right now, I'll run another comparison tomorrow for a quiet time overnight. 

Images attached to this report
Comments related to this report
jim.warner@LIGO.ORG - 08:48, Wednesday 18 September 2019 (52017)

Spectra from 2:41 local, I don't see any significant differences between the L4Cs. I'll poke around a bit more, but I don't see anything to worry about here.

Images attached to this comment