Reports until 14:49, Tuesday 07 July 2026
H1 PEM
thomas.shaffer@LIGO.ORG - posted 14:49, Tuesday 07 July 2026 (90908)
HAM3 Table Baffle B&K Results

Rahul K, TJ S

Numerous beam dumps and other coated panels were added to HAM3 to mitigate stray light in the area. While we couldn't spend the time to test all of them, we chose the few that seemed like they would be the worst offenders.  The best map I know of for the newly added parts is in D2600134. Accelerometer locations marked on the last attachment of this log.

Accelerometer location 1 -  -X+Y corner of optical table. Acc dofs = IFO dofs

Meas 1 - On the table baffle mount in -X
Meas 2 - -Y 
Meas 3 - -Z

Location 2 - On the table next to the scraper baffle addition. Dofs = IFO

Meas 4 - Hitting the mount of the scraper baffle addition. +Y direction
Meas 5 - +X hit on same mount
Meas 6 - -Z on same mount

Since we couldn't mount the accelerometer directly to any of these new beam dumps and panels, we had to mount it to the table and pick up all of the other table noises. That said, I don't see anything terrible in these, so it looks okay to move on.

Images attached to this report