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Design and sensitivity of a 6-axis seismometer for gravitational wave observatories
Leonid Prokhorov, Sam Cooper, Amit Singh Ubhi +13
We present the design, control system, and noise analysis of a 6-axis seismometer comprising a mass suspended by a single fused silica fibre. We utilise custom-made, compact Michel…
Interferometric sensing of a commercial geophone
S. J. Cooper, C. J. Collins, L. Prokhorov +3
We present a modified commercial L-4C geophone with interferometric readout that demonstrated a resolution 60 times lower than the included coil-magnet readout at low frequencies.…
A six degree-of-freedom fused silica seismometer: Design and tests of a metal prototype
Amit Singh Ubhi, Jiri Smetana, Teng Zhang +6
Ground vibrations couple to the longitudinal and angular motion of the aLIGO test masses and limit the observatory sensitivity below 30\,Hz. Novel inertial sensors have the potenti…