Time Delay Interferometry Experiments at the University of Florida Interferometric Simulator.

Details Time Delay Interferometry Experiments at the University of Florida Interferometric Simulator. Time Delay Interferometry Experiments at the University of Florida Interferometric Simulator.

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21548212m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #482.12; Bulletin of the American Astronomical Society, Vol. 42, p.575

Astronomy and Astrophysics

Astronomy

Scientific paper

The Laser Interferometer Space Antenna (LISA) is a joint NASA/ESA space mission proposed to directly measure gravitational waves in the frequency range from 30 uHz to 1 Hz. To accomplish this LISA will utilize a modified Michelson interferometer to measure the spatial changes between three drag-free proof masses in a heliocentric orbit separated by a distance of 5 Gm. In order to accurately measure the distance between the proof masses, LISA requires ultra-stable laser signals to reduce the noise in the measurement. Any additional laser noise must be recorded and extracted from the final measurement through a method known as time-delay interferometry (TDI). The University of Florida LISA Interferometry Simulator (UFLIS) has the ability to perform a hardware-in-the-loop simulation of the LISA Constellation in order to verify laser noise stabilization and extraction techniques. We present the UFLISs' capability to replicate the expected pre-stabilized laser noise, measure and delay the laser signals due to the light-travel time along the LISA arm, and inject mock gravitational wave signals. The resulting laser beatnotes are then recorded and combined based on TDI theory to extract the laser noise and recover the injected gravitational wave signals to within the requirement proposed by the LISA mission science team. This work is supported by NASA through grants BEFS 04-0019-0019 and 07 ATFP 07-0116.

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