Recovery work: now arms are locking as usual
- FB is failing very frequently. Everytime I see red signals in the CDS summary, I have to run "sudo ntpdate -b -s -u pool.ntp.org"
- PMC was aligned
- The main Marconi returned to initial state. Changed the frequency and amplitude to the nominal value labeled on the unit
- The SHG oven temp controllers were disabled. I visited all three units and pushed "enable" buttons.
- Y arm was immediately locked. It was aligned using ASS.
- X arm did not show any flash. I found that the scx model was not successfully burtrestored yesterday.
The setting was restored using Mar 22 snapshot.
- After a little tweak of the ETMX alignment, a decent flash was achieved. But still it could not be locked.
- Run s/LSC/LSCoffset.py. This immediately made the X arm locked.
- Checked the green alignment. The X arm green is beating with the PSL at ~100MHz but is misaligned beyond the PZT range.
The Y arm green is locked on TEM00 and is beating with the PSL at ~100MHz. |