Sensors and Actuators for the Advanced LIGO+ Upgrade

Abstract

As part of the Advanced LIGO+ (A+) project we have developed, produced, and characterised sensors and electronics to interrogate new optical suspensions. The central element is a displacement sensor with an integrated electromagnetic actuator known as a BOSEM and its readout and drive electronics required to integrate them into LIGO's control and data system. In this paper we report on improvements to the sensors and testing procedures undertaken to meet enhanced performance requirements set out by the A+ upgrade to the detectors. The best devices reach a noise level of $4.5\times 10^{-11}\mathrm{m}/\sqrt{\mathrm{Hz}}$ at a measurement frequency of 1 Hz.

References in corpus (11)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Multi-messenger Observations of a Binary Neutron Star Merger
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• Observation of gravitational waves from two neutron star-black hole coalescences
• Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run
• Sensors and Actuators for the Advanced LIGO Mirror Suspensions
• Low mechanical loss TiO${}_2$:GeO${}_2$ coatings for reduced thermal noise in Gravitational Wave Interferometers
• The population of merging compact binaries inferred using gravitational waves through GWTC-3
• Reducing controls noise in gravitational wave detectors with interferometric local damping of suspended optics
• Calibration of Advanced Virgo and reconstruction of detector strain h(t) during the Observing Run O3

Cited by in corpus (5)

• Reducing controls noise in gravitational wave detectors with interferometric local damping of suspended optics
• Constraining the modified friction in gravitational wave propagation with precessing black hole binaries
• A potential third-generation gravitational-wave detector based on autocorrelative weak-value amplification
• Extending Ground-Based Gravitational-Wave Sensitivity to 5 Hz
• Reducing suspension control noise with interferometric sensors -- an experimental concept