Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-11-06
AIPConf.Proc.873:561-565,2006
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Submitted to Proceedings of the 6th International LISA Symposium, AIP Conference Proceedings 2006
Scientific paper
10.1063/1.2405099
A four mass torsion pendulum facility for testing of the LISA GRS is under development in Trento. With a LISA-like test mass suspended off-axis with respect to the pendulum fiber, the facility allows for a direct measurement of surface force disturbances arising in the GRS. We present here results with a prototype pendulum integrated with very large-gap sensors, which allows an estimate of the intrinsic pendulum noise floor in the absence of sensor related force noise. The apparatus has shown a torque noise near to its mechanical thermal noise limit, and would allow to place upper limits on GRS related disturbances with a best sensitivity of 300 fN/Hz^(1/2) at 1mHz, a factor 50 from the LISA goal. Also, we discuss the characterization of the gravity gradient noise, one environmental noise source that could limit the apparatus performances, and report on the status of development of the facility.
Carbone Laurent
Cavalleri Andrea
Ciani Giacomo
Dolesi Rita
Hueller Mauro
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