R&D (FilterCavity)
MarcEisenmann - 16:46, Thursday 09 March 2023 (3201)
FC green alignment recovered

[Marc, Rishabh, Shalika]

After Takahashi-san opened the END gate valve, we recovered the GR beam on 2nd target.

We corrected the H3 sign issue and could realign the END reflection on 2nd target. We did some offload in pitch and yaw without issue.

We also realigned the END oplev.

Finally, we realigned INPUT by overlapping the input and reflected beam on the GR Faraday Isolator.

After some alignment tweaks, we were able to see GR fundamental mode in transmission of the FC but were not able to engage the lock.

We will investigate this issue.