Reports until 00:06, Tuesday 23 April 2019
H1 PEM
robert.schofield@LIGO.ORG - posted 00:06, Tuesday 23 April 2019 (48682)
5.25 hours of PEM injections

Sharan Banagiri, Philippe Nguyen, Robert Schofield

We have used 17.25 out of the 15-20 hours, and we are mostly done with PEM injections, though there are a few loose ends to tie up.

We made acoustic injections at MY - we didn’t find any coupling but did find an accelerometer that needs replacing, we made big shaker injections at EX, looked inside HAM5 and 6, saw the very bright small angle scattering from the septum window, and narrowed at least one component of the 48 Hz peak to the vertex. We also make some site activities injections, finding that we seem more sensitive than for previous runs, so we may want to do some more site activity tests.

Times UTC:

19:00-19:45 

23:30 – 1:40

2:41 – 3:49

4:36 – 5:04

5:57 – 6:53