Reports until 12:33, Tuesday 21 January 2025
H1 ISC
jennifer.wright@LIGO.ORG - posted 12:33, Tuesday 21 January 2025 (82383)
Updated OMC QPD offsets

I took another look at the data from last week where we put lines on the OMC angular control loops and then used the BLRMS at the PCAL line 410Hz to look at which combination of offsets increased the optical gain.

The plot shown has cursors at the values I think we should change the current offsets by to maximise our optical gain. We expect this could maybe improve the gain by 1%.

I added these values to H1:ASC-OMC_A_PIT_OFFSET, H1:ASC-OMC_A_YAW_OFFSET, H1:ASC-OMC_B_PIT_OFFSET, H1:ASC-OMC_B_YAW_OFFSET.

The second image shows the old values: -0.37, 0.25, -0.17, -0.11

The new values are: -0.45, 0.325, -0.245, -0.19.

At the bottom I attach picturers of where I accepted these sdfs in the safe and OBSERVE snap files. As far as I can tell they are not reset by guardian at any point.

 

Images attached to this report