60 citations · 162 across the 14 of their papers we have counts for
5 papers · 1 filter
Demonstration of the minimal coupling of horizontal accelerations to rotations in a torsion balance suspended from three wires
Amit Singh Ubhi, Clive C. Speake, Emilia Chick +1
The Cavendish torsion balance is the instrument of choice for measuring weak forces, such as gravity. Although torsion balances have extremely high sensitivity for measuring forces…
Sensitivity and control of a 6-axis fused-silica seismometer
Jiri Smetana, Amit Singh Ubhi, Emilia Chick +12
We present a pair of seismometers capable of measurement in all six axes of rigid motion. The vacuum-compatible devices implement compact interferometric displacement sensors to su…
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…
Compact Michelson interferometers with subpicometer sensitivity
Jiri Smetana, Rebecca Walters, Sophie Bauchinger +11
The network of interferometric gravitational-wave observatories has successfully detected tens of astrophysical signals since 2015. In this paper, we experimentally investigate com…
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…