J. Warner
YOU?
Author Swipe
View article: GEMINI: The First Underground Testbed for Seismic Isolation and Interplatform Control in Next-Generation Gravitational-Wave Detectors
GEMINI: The First Underground Testbed for Seismic Isolation and Interplatform Control in Next-Generation Gravitational-Wave Detectors Open
GEMINI is an underground research and development facility dedicated to advancing seismic isolation and control technologies for future gravitational-wave observatories, including the Einstein Telescope (ET) and the Lunar Gravitational-Wav…
View article: A control strategy for seismic noise reduction on advanced LIGO gravitational-wave detector
A control strategy for seismic noise reduction on advanced LIGO gravitational-wave detector Open
The differential seismic motion between the internal seismic isolation platforms on the advanced laser interferometer gravitational wave observatory, affects the sensitivity of the detector at lower frequencies (below 1 Hz), because each p…
View article: Searching for the causes of anomalous Advanced LIGO noise
Searching for the causes of anomalous Advanced LIGO noise Open
Advanced LIGO and Advanced Virgo have detected gravitational waves from astronomical sources to open a new window on the Universe. To explore this new realm requires an exquisite level of detector sensitivity, meaning that the much stronge…
View article: Interferometric sensing of a commercial geophone
Interferometric sensing of a commercial geophone Open
We present a modified commercial L-4C geophone with interferometric readout that demonstrates a resolution 60 times lower than the included coil-magnet readout at low frequencies. The intended application for the modified sensor is in vibr…
View article: An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5
An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5 Open
We investigate the radio, X-Ray and far-infrared properties of active galactic nuclei (AGN) with strong radio jets at 2.2 < z < 3.5 in the COSMOS field and compare them to AGN without obvious radio jets at similar redshift. We identify 4 j…
View article: Towards windproofing LIGO: reducing the effect of wind-driven floor tilt by using rotation sensors in active seismic isolation
Towards windproofing LIGO: reducing the effect of wind-driven floor tilt by using rotation sensors in active seismic isolation Open
Modern gravitational-wave observatories require robust low-frequency active seismic isolation in order to keep the interferometer at its ideal operating conditions. Seismometers are used to measure both the motion of the ground and isolate…
View article: Particle swarming of sensor correction filters
Particle swarming of sensor correction filters Open
Reducing the impact of seismic activity on the motion of suspended optics is essential for the operation of ground-based gravitational wave detectors. During periods of increased seismic activity, low-frequency ground translation and tilt …
View article: Control strategy to limit duty cycle impact of earthquakes on the LIGO gravitational-wave detectors
Control strategy to limit duty cycle impact of earthquakes on the LIGO gravitational-wave detectors Open
International audience
View article: Low Frequency Tilt Seismology with a Precision Ground Rotation Sensor
Low Frequency Tilt Seismology with a Precision Ground Rotation Sensor Open
We describe measurements of the rotational component of teleseismic surface waves using an inertial high-precision ground-rotation-sensor installed at the LIGO Hanford Observatory (LHO). The sensor has a noise floor of 0.4 nrad$/ \sqrt{\rm…