Shoda-san, Fujii-san, Kozu-kun, Mark, Enzo.

Today we performed TFs measurements from several DoFs of the different stages to the Michelson signal and to the Michelson error signal. In order to check the coupling between the DoFs of BS stages and the MICH.

The excitations ordered per stages were:

• IP: IP_L, IP_T.
• GAS: FO_GAS, F1_GAS, BF_GAS.
• IM: IM_P, IM_R, IM_T, IM_V, IM_Y.
• TM: TM_P, TM_Y.

We had chosen this measurements and we left behind the IP_Y because it can be infered with the measured/calculated TF (IP_Y to TM_Y).

And also we skipped IM_L because this was done to lock the Michelson, so we have this info.

The data can be found in the directory: /users/VIS/bKAGRA1_BSTF. Later on we will present our conclusions about this measurements.

Note 1: We could notice that the Michelson was very sensitive to the excitations from IM_Y, and we had to reduce the amplitude a lot to avoid losing the Lock. (We lost it twice ~JST 16:40)