NAOJ GW Elog Logbook 3.2
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NaokiAritomi - 16:10, Wednesday 02 June 2021 (2550)
Comment to Filter cavity misalignment can cause FDS detuning change (Click here to view original report: 2540)
I calculated the IR misalignment effect on CCFC error signal in I phase.
As you can see, even if the IR mode matching changes between 90% and 100%, the zero crossing point of CCFC error signal (detuning) changes by only ~ 0.06*54 = 3 Hz. So this effect cannot explain ~10Hz FDS detuning fluctuation.
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