Fig.1 shows the IRXY trans power changes between just before the laser accident in August and November 27th.

White dotted lines are just put to connect between just before the accident and just after the recovery. The reduction rate changed around 70~65 for both. Especially, the IRY was over IRX. As you know IRX was larger than IRY for a long time. In addition, IRY started increasing. Why??  Are the beam spots at the same position as before in each sapphire mirror?