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Showing 1 to 20 of 119 for “"LIGO"”.
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Detector Characterization for Advanced LIGO
<p>The first observing run of Advanced LIGO spanned 4 months, from September</p> <p>12, 2015 to January 19, 2016, during which gravitational waves were directly detected</p> <p>from two binary black hole systems, namely GW150914 and GW151226. Confident</p> <p>detection of gravitational waves …
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Baffle material characterization for Advanced LIGO
The transition to Advanced LIGO introduces new sensitivity requirements for the LIGO interferometers. When light scatters away from the main laser beam, then scatters off the beam tube and returns to the main beam, noise is introduced into the phase of the laser. The Auxiliary Optics Support …
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Passive damping of a LIGO mirror
… Interferometer Gravitational-Wave Observatory (LIGO) has built detectors to search for these GWs. In essence, these detectors are several kilometer long Michelson interferometers with Fabry-Perot cavities in the arms. In order to detect gravitational waves, LIGO must be sensitive to relative …
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ADPATIVE MODE MATCHING UPGRADE FOR ADVANCED LIGO
<p>Advanced LIGO is commissioning new noise reducing technologies that are sensitive to optical losses generated by optical cavity mode mismatch. Optical losses due to mode mismatched Fabry-P´erot optical cavities can be reduced by the use of adaptive optics, wavefront sensors, and feedback control …
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Adaptive modal damping for advanced LIGO suspensions
… Interferometer Gravitational-Wave Observatory (LIGO) aims to pick up the signals from these very faint waves. LIGO directs much of its effort to the areas of disturbance rejection and noise suppression to measure these waves. The work in this thesis develops an adaptive modal damping control …
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Experimental testing of LIGO vibration isolation system
The LIGO (Laser Interferometer Gravitational-wave Observatory) project is designed to detect gravitational waves using precision interferometry. The detection from astrophysical sources has the potential to test Einstein's Theory of General Relativity, and additionally open a new window into the …
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Adaptive Mode Matching in Advanced LIGO and Beyond
… wave astronomy was ushered in by the LIGO (Laser Interferometer Gravitational-Wave Observatory) collaboration with the detection of a binary black hole collision [2]. The event that shook the foundation of space-time allowed mankind to view the cosmos in a way that had never been done …
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Fscan Code Development For Advanced Ligo Detector Characterization
… Interferometer Gravitational-wave Observatory (LIGO) is an experiment designed to provide direct detection of gravitational waves. Its searches for periodic gravitational waves are highly susceptible to long-duration noise that appears as spectral lines. FScan is a tool for finding spectral …
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Characterization of an advanced LIGO quadruple pendulum system
… Interferometer Gravitational-wave Observatory (LIGO) measures relative displacements of the interferometer mirrors induced by passing gravitational waves (GWs). At low frequencies, typically below 30 Hz, seismic noise is the dominant noise source that limits the sensitivity with which GW-induced …
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Quantum noise reduction using squeezed states in LIGO
… been accomplished with the initial generation of LIGO interferometric gravitational wave detectors. A new generation of detectors currently under construction is designed improve on the sensitivity of the initial detectors by about a factor of 10. The quantum nature of light will limit the …
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IMPROVING THE SENSITIVITY OF ADVANCED LIGO THROUGH DETECTOR CHARACTERIZATION
… compact binary coalescences (CBCs) in Ad- vanced LIGO’s second observing run (O2). This observing run started on November 30, 2016, and lasted until August 25, 2017, and resulted in the identification of 8 unambiguous gravitational-wave signals, including the first observation of a binary neutron …
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DQTunePipe: a Set of Python Tools for LIGO Detector Characterization
<p>When LIGO's interferometers are in operation, many auxiliary data channels monitor and record the state of the instruments and surrounding environmental conditions. Analyzing these channels allows LIGO scientists to evaluate the quality of the data collected and veto data segments of poor …
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Modal control with state estimation for advanced LIGO quadruple suspensions
… Interferometer Gravitational Wave Observatory (LIGO), these detections are now believed to be possible and may occur in the very near future. The research discussed here is on an active control system for the quadruple pendulum, from which the mirrors of the LIGO interferometer are suspended. …
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A LIGO Double Pendulum Suspension Prototype for Reducing Unwanted Cross-Couplings
… Interferometer Gravitational-Wave Observatory (LIGO) is a Michelson Interferometer with 4km long arms used to detect gravitational waves passing through earth. LIGO uses extremely isolated optics in the form of suspensions to measure slight changes in laser path length down the two …
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Squeezing the Quantum Noise of LIGO below the Standard Quantum Limit
… Interferometer Gravitational-Wave Observatory (LIGO) detectors. Upon reaching Earth, these waves caused a minuscule length change between the LIGO mirrors, on the order of 10^(−18) m, a thousand times smaller than a proton. The unprecedented sensitivity of LIGO requires an extremely low noise …
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LIGO photodiode characterization and measurement of the prestabilized laser intensity noise
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
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LIGO interferometer operating at design sensitivity with application to gravitational radiometry
… Interferometer Gravitational Wave Observatory (LIGO) were built and commissioned. In fall 2005 design sensitivity was achieved, corresponding to a strain sensitivity of 2.5 x 10-23 Hz-1/2 at 150 Hz. All three interferometers are now in an extended science run. One of the most critical steps to …
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Searching for Gravitational Waves from Compact Binary Coalescence Using LIGO and Virgo Data
… from compact binary coalescences (CBCs) by the LIGO Scientific Collaboration (LSC) and the Virgo Collaboration. We briefly review the physics of gravitational-wave emission and detection, describing how gravitational waves are emitted from "inspiraling" compact stellar mass objects and how the …
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The search for unmodeled gravitational-wave transients in the Advanced LIGO-Virgo Era
… and thus their detections with Advanced LIGO-Virgo has led to an enormous number of physical insights. Nevertheless, we expect transient GW sources with waveforms that are not fully modeled or are too quiet to be fully resolved may contain an abundant wealth of physical richness in their …
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A study of the detection efficiency of the LIGO interferometers to transient sources
The LIGO (Laser Interferometer Gravitational Wave Observatory) detectors have now completed their fifth science run and have reached design sensitivity. Gravitational wavebursts only last for a few cycles within the characteristic frequency band of LIGO. This work focuses on the study of burst-like …
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