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Omni-directional interferometric inertial sensor

Descripción del proyecto

Sensores inerciales avanzados para la astrofísica de ondas gravitacionales

El acoplamiento de sensores interferométricos compactos a una masa de referencia que detecta señales en todas las direcciones (masa omnidireccional) conllevará mejoras revolucionarias en la sensibilidad de los sensores. En el marco del proyecto OmniSens, financiado con fondos europeos, la Fundación de la Universidad Libre de Ámsterdam de los Países Bajos ha desarrollado un novedoso sistema inercial que reducirá las aceleraciones residuales en dirección horizontal al menos en dos órdenes de magnitud a ondas gravitacionales de baja frecuencia (0,1 Hz). Si se usa como primera etapa de aislamiento en detectores de ondas gravitacionales, el sistema permitirá a los detectores alcanzar su sensibilidad de diseño y allanará el camino para el uso de frecuencias más bajas en los observatorios.

Objetivo

OmniSens is a novel inertial isolation system that will approach the fundamental limits imposed by materials and terrestrial gravity. Revolutionary improvements in sensitivity will come from coupling compact interferometric sensors that are beyond the state-of-the-art with a reference mass that is Omni-directionally Sensed (OmniSens). The key concept is the use of a single, geometrically-large reference mass that is sensed and softly-suspended in all six degrees of freedom, and housed within a platform that is actively controlled to be a constant distance from it. The inertial stability of the reference mass is thus transferred to the platform in a fashion mimicking the drag-free control of a satellite around a free-floating proof mass.

Compared with the state-of-the-art, OmniSens will reduce residual accelerations in horizontal directions by at least 2 orders of magnitude at 0.1Hz. When this system is used as the first stage of isolation in a gravitational-wave detector, it will enable current detectors to finally reach their design sensitivities and push the ‘seismic wall’ to lower frequencies in future observatories.

Pushing the low frequency boundary will have two critical effects: it will increase the signal-to-noise of individual sources, thus expanding the astrophysical reach of observatories, and it will vastly augment the amount of time each source is in-band, possibly allowing sky localisation before the merger of neutron stars, with spectacular consequences for electromagnetic follow up campaigns.

To achieve these ambitious goals we will need to: Develop the test and measurement infrastructure capable of housing and measuring the reference mass; Test a prototype isolation system, showing that it can reach fundamental limits imposed by simple, metal-wire suspensions; and Build a robust OmniSens system suspended with fused-silica fibres that will become a foundational element of future gravitational-wave observatories.

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural.

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Régimen de financiación

ERC-COG - Consolidator Grant

Institución de acogida

STICHTING VU
Aportación neta de la UEn
€ 1 606 331,00
Dirección
DE BOELELAAN 1105
1081 HV Amsterdam
Países Bajos

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Tipo de actividad
Higher or Secondary Education Establishments
Enlaces
Coste total
€ 1 606 331,00

Beneficiarios (2)