Characterization of electrostatic actuators for suspended mirror control with modulated bias

Rosa, R. De; Garufi, F.; Milano, L.; Mosca, S.; Persichetti, G.

doi:10.1088/1742-6596/228/1/012018

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…Furthermore, instead of using coil-magnet actuation pairs to exert control forces on the test masses, electrostatic interaction is employed. This actuation scheme helps to avoid coupling of magnetic noise to the gravitational wave channel [26,27].…”

Section: Interferometer Configurationmentioning

confidence: 99%

Sensitivity of the Advanced LIGO detectors at the beginning of gravitational wave astronomy

Мартынов¹,

Hall²,

Abbott³

et al. 2016

Phys. Rev. D

358

268

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The Laser Interferometer Gravitational Wave Observatory (LIGO) consists of two widely separated 4 km laser interferometers designed to detect gravitational waves from distant astrophysical sources in the frequency range from 10 Hz to 10 kHz. The first observation run of the Advanced LIGO detectors started in September 2015 and ended in January 2016. A strain sensitivity of better than 10 −23 / √ Hz was achieved around 100 Hz. Understanding both the fundamental and the technical noise sources was critical for increasing the astrophsyical strain sensitivity. The average distance at which coalescing binary black hole systems with individual masses of 30 M could be detected above a signal-to-noise ratio (SNR) of 8 was 1.3 Gpc, and the range for binary neutron star inspirals was about 75 Mpc. With respect to the initial detectors, the observable volume of the Universe increased by a factor 69 and 43, respectively. These improvements helped Advanced LIGO to detect the gravitational wave signal from the binary black hole coalescence, known as GW150914.

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Section: Interferometer Configurationmentioning

confidence: 99%

Sensitivity of the Advanced LIGO detectors at the beginning of gravitational wave astronomy

Мартынов¹,

Hall²,

Abbott³

et al. 2016

Phys. Rev. D

358

268

View full text Add to dashboard Cite

show abstract

“…Electrostatic actuators (EA) [10] are the most promising devices for mirror control for next generation interferometric gravitational wave detectors.…”

Section: A Sensors and Actuators On Simple Pendulummentioning

confidence: 99%

Model independent numerical procedure for the diagonalization of a Multiple Input Multiple Output dynamic system

Persichetti

Chiummo

Acernese

et al. 2010

2010 17th IEEE-NPSS Real Time Conference

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Seismic noise limits Earth based gravitational wave interferometric detectors at low frequencies. The detection threshold can be lowered down to a few Hz using a seismic attenuation system based on Inverted Pendulum (IP) which sustains interferometer optical components by means of a pendula chain. The IP, acting as a mechanical low pass filter, is able to filter out seismic noise and at the same time it provides a quasi-inertial stage where the suspension point of the pendula chain lies. The IP is a three degrees of freedom system, it has two translational and one rotational modes. Therefore, to fully determinate its position, three independent sensors are mounted at the periphery of the IP top table. For the same reason, three independent actuators are used to move the IP. The geometrical position of the sensors is different from actuator positions, in addition, both of them are not connected to the normal modes of the IP. Each sensor will be sensitive in all the three IP normal modes and each actuator will generate movements which are a mix of the three modes. To take advantage of controlling a SISO (Single Input Single Output) system instead of a MIMO (Multiple Input Multiple Output) system, a diagonalization of the actuation and detection system is needed. An original and model independent experimental procedure for determining the system dynamic, giving an effective diagonalization has been developed and tested.

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Environmental Noise in Gravitational-Wave Interferometers

Fiori

Effler

Nguyen

et al. 2021

Handbook of Gravitational Wave Astronomy

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Characterization of electrostatic actuators for suspended mirror control with modulated bias

Cited by 5 publications

References 11 publications

Sensitivity of the Advanced LIGO detectors at the beginning of gravitational wave astronomy

Sensitivity of the Advanced LIGO detectors at the beginning of gravitational wave astronomy

Model independent numerical procedure for the diagonalization of a Multiple Input Multiple Output dynamic system

Environmental Noise in Gravitational-Wave Interferometers

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