The MC alignment is getting better by steering the axis of the incident beam into the MC.
We found the beam spot on MC1 and MC3 were quite off-centered in the beginning of today's work. It had the coil gain ratio of 0.6:1.4 after running the A2L script.
In order to let the beam hit the center of the MC1 and MC3, we steered the bottom mirror attached on the periscope on the PSL table to the yaw direction.
And then we got better numbers for the coil gain ratio (see the numbers listed at the bottom).
For the pitch direction, there still are some rooms to improve because we didn't do anything with the pitch. It is going to be improved tomorrow or later.
Here are the amounts of off-centering on MC1 and MC3 after steering the axis.
C1:SUS- MC1_ULPIT_GAIN = 0.900445
C1:SUS-MC1_ULYAW_GAIN = 0.981212
C1:SUS-MC3_ULPIT_GAIN = 0.86398
C1:SUS-MC3_ULYAW_GAIN = 1.03221