[YokozaWashimi]
For the IMC vibration tests for the resistance against blastings (~200 um/sec @ KAGRA CS is expected, JGW-G2415755), we checked how large ground vibration we can generate.
I (M~75kg) jumped near the MCF seismometer located outside of the clean booth. The peak amplitude was ~100 um/s in the Y&Z-directions and ~40 um/s in the X-direction.
During this work, the IMC cavity power was not changed.
After this work, we moved the permanent seismometer (S1707526) from outside to inside the MCF clean booth.
At first, we tried to locate it below the MCF chamber (like OMC), but the height of the space was not enough.
Finally, the seismometer is located as the pictures place. (It needs to be moved if we re-open this chamber, maybe)
I compared the MCF seismometer's signal between the old and the new places.
Red: New place (5/14 9 pm)
Blue: Old place (5/13 9 pm)
Z-axis: The new place is smaller
X/Y-axis: The new place is larger over 70 Hz and smaller below it.
