[Ikeda, Takahashi]
We checked the OSEMs visually. The flap of OSEM#3 and #4 in the IM was rotated more than 40°.
According to the health check in January, gain of OSEM #3 (H2) and #4 (V3) are 3 dB and 5 dB smaller than before the earthquake, respectively (fig1 and 2).
Note:
Somehow, SRM IM OSEM TFs have lower gain (2-5 dB) than before the earthquake not only in H2 and V3 but also the others (fig3: case of H3).
Further investigation is necessary.
