R&D (Cryogenic)
SatoshiTanioka - 00:53, Thursday 23 January 2020 (1983)
Alignment recovery

As I replaced some mirror mounts yesterday, the beam alignment needs to be adjusted.
In addition, the beam profile was also changed and the beam size at AOMs are relatively larger, about 800 um.
Therefore, I tried to minimize the beam size at AOMs with changing the lenses and their positions.

I could somehow adjust the beam size about 500 um at AOMs.

The next step is adjust the alignment in order to inject beams to AOMs.
Then play with STMs to maximize the diffracted beam power.

Comments related to this report
SatoshiTanioka - 16:46, Thursday 23 January 2020 (1989)

I adjusted the beam size at AOMs by changing the positions of lenses.
I aligned one of the AOMs and I could get about 70 % diffaction efficiency with double-pass.
Then I put a BS for ISS.

The next step is align another AOM and install a BS.