415 citations · 2.3k across the 29 of their papers we have counts for
10 papers · 1 filter
A Cryogenic Torsion Balance Using a Liquid-Cryogen Free, Ultra-Low Vibration Cryostat
S. M. Fleischer, M. P. Ross, K. Venkateswara +5
We describe a liquid-cryogen free cryostat with ultra-low vibration levels which allows for continuous operation of a torsion balance at cryogenic temperatures. The apparatus uses…
Point Absorber Limits to Future Gravitational-Wave Detectors
W. Jia, H. Yamamoto, K. Kuns +198
High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors…
LIGOs Quantum Response to Squeezed States
L. McCuller, S. E. Dwyer, A. C. Green +194
Gravitational Wave interferometers achieve their profound sensitivity by combining a Michelson interferometer with optical cavities, suspended masses, and now, squeezed quantum sta…
Point absorbers in Advanced LIGO
Aidan F. Brooks, Gabriele Vajente, Hiro Yamamoto +198
Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nano-meter scale thermo-elastic deformations a…
A Low-Frequency Torsion Pendulum with Interferometric Readout
M. P. Ross, K. Venkateswara, C. A. Hagedorn +6
We describe a torsion pendulum with a large mass-quadrupole moment and a resonant frequency of 2.8 mHz, whose angle is measured using a modified Michelson interferometer. The syste…
Improving the Robustness of the Advanced LIGO Detectors to Earthquakes
Eyal Schwartz, A Pele, J Warner +196
Teleseismic, or distant, earthquakes regularly disrupt the operation of ground--based gravitational wave detectors such as Advanced LIGO. Here, we present \emph{EQ mode}, a new glo…
Towards windproofing LIGO: Reducing the effect of wind-driven floor tilt by using rotation sensors in active seismic isolation
Michael P. Ross, Krishna Venkateswara, Conor Mow-Lowry +9
Modern gravitational-wave observatories require robust low-frequency active seismic isolation in order to keep the interferometer at its ideal operating conditions. Seismometers ar…
First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO
Carl Blair, Slawek Gras, Richard Abbott +16
Interferometric gravitational wave detectors operate with high optical power in their arms in order to achieve high shot-noise limited strain sensitivity. A significant limitation…
Seismic isolation of Advanced LIGO: Review of strategy, instrumentation and performance
F. Matichard, B. Lantz, R. Mittleman +49
Isolating ground-based interferometric gravitational wave observatories from environmental disturbances is one of the great challenges of the advanced detector era. In order to dir…
A high-precision mechanical absolute-rotation sensor
Krishna Venkateswara, Charles A. Hagedorn, Matthew D. Turner +2
We have developed a mechanical absolute-rotation sensor capable of resolving ground rotation angle of less than 1 nrad above mHz and 0.2 nrad$/\sqrt{\text{H…