sheila.dwyer@LIGO.ORG - posted 11:54, Friday 13 July 2018 - last comment - 15:52, Friday 13 July 2018(42890)
MICH BRIGHT alignment
We have made a branch of the ALIGN IFO guardian which should replace the manual alignment of the beam splitter in MICH dark. This is finishing up work that was started here and here
It locks the bright michelson, engages the AS centering loops, uses ADS to maximize the AS air build up dithering the beam splitter, waits for the loops to converge, and offloads both the beam splitter and OM alignments to the sliders. There is a bit of an oscillation, but this seems to work well enough for an initial alignment servo.
Instead of aligning the Michelson by hand, from now on we should just need to request MICH_BRIGHT_OFFLOADED from the ALIGN_IFO guardian.
This is checked into the SVN as 17552
I also renumbered the states in the ALIGN_IFO guardian because the randomly generated ordering causes confusion.
I set aside a decade for each of these categories: suspension management, Xarm IR, Y arm IR, PRX, MICH dark, MICH bright, SRY Screenshots of the old and new graphs are attached.