Enhancements to the Laser Interferometer Gravitational-Wave Observatory (LIGO)

Details Enhancements to the Laser Interferometer Gravitational-Wave Observatory (LIGO) Enhancements to the Laser Interferometer Gravitational-Wave Observatory (LIGO)

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347703b&link_type=abstract

American Astronomical Society, AAS Meeting #213, #477.03; Bulletin of the American Astronomical Society, Vol. 41, p.443

Astronomy and Astrophysics

Astronomy

Scientific paper

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is currently in the middle of an enhancement upgrade designed to get the highest possible sensitivity out of the currently installed hardware. The corner stones of this upgrade are a new in-vacuum output mode cleaner suspended from a seismically isolated platform, the switch to a DC readout scheme, a new 35W main laser, a new high power Faraday isolator and Electro-Optic modulator, an upgraded thermal compensation system and new test mass actuation magnets. The goal is to achieve about a factor of two higher gravitational wave (GW) strain sensitivity, resulting in an order of magnitude increase of the expected GW event rate. With that sensitivity LIGO intends to observe until the observatories are shut down for the Advanced LIGO upgrade, tentatively scheduled for mid 2011. I will report on the progress of the upgrade and present the latest achieved strain sensitivity. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement PHY-0107417.

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