Reports until 18:13, Sunday 15 April 2018
H1 AOS
robert.schofield@LIGO.ORG - posted 18:13, Sunday 15 April 2018 (41449)
Comparison of HAM5 wall to table top motion for scattered light mitigation

As a quick check, the attached figure shows that the vacuum enclosure walls of LLO HAM5 move between about 10^2 and 10^3 times more than the table top in the 10-100 Hz band. Thus, even if baffles that were mounted on the table top were as good at back-scattering light as the HAM5 doors (unlikely), and they were only 10 cm away from an OFI scattering site, a linear estimate suggests they would cause less noise than reflections off of the more distant door. Of course, for the same geometric attenuation reason, the further the baffles are from the OFI, the better.

Images attached to this report