aLIGO LHO Logbook

H1 General

betsy.weaver@LIGO.ORG - posted 16:18, Thursday 21 September 2017 - last comment - 19:21, Thursday 21 September 2017(38737)

Daily vent status

Any details from teams may be in other alogs, but in summary today the following happened.

HAM2 (Kissel, Hugh, Jim, Rick, various helpers):

HAM2 ISI damper installs were finished

ISS was reseated in it's previous position after moved for access for the IS damper install

HAM3 (Corey, Robert, Hugh, Jim, Bartlett, Travis):

Finished HAM3 chamber entry contam control - pulled wafers, samples, etc.

Locked up MC2 and PR2 optics, added face shields

Inner panels of Swiss Cheese Baffle (MCA1, I think) were removed via Corey and Robert walking down the MC tube from HAM3 with tools

H3 ISI damper work started

Robert took a photo assay of HAM and BSC optic views via a walkabout in the corner chambers

BSC3 (Kissel, Travis, Betsy):

Removed the hefty QUAD structure sleeve

Mounted equipment to measure violin modes of the ITMx fibers

Took 1 fiber-worth of violin measurements (the fundamental and then 3 harmonics above that - up to 2k)

Comments related to this report

jeffrey.kissel@LIGO.ORG - 19:21, Thursday 21 September 2017 (38742)DetChar, SEI, SUS, SYS

Link

J. Kissel, T. Sadecki, B. Weaver

A couple of good pictures from today:

- A labelled picture of Travis working on the virtually complete, temporary setup for the measurement of the fiber violin modes

- A unadulterated version of the same picture

- An hilarious picture of Travis and I, showing the impact of taking 10 averages of 15 mHz amplitude spectral densities.

Images attached to this comment