Torsion pendulum facility for ground testing of gravitational sensors for LISA

Details Torsion pendulum facility for ground testing of gravitational sensors for LISA Torsion pendulum facility for ground testing of gravitational sensors for LISA

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cqgra..19.1757h&link_type=abstract

Classical and Quantum Gravity, Volume 19, Issue 7, pp. 1757-1765 (2002).

Computer Science

Performance

17

Scientific paper

We report here on a torsion pendulum facility for ground-based testing of the Laser Interferometer Space Antenna (LISA) gravitational sensors. We aim to measure weak forces exerted by a capacitive position sensor on a lightweight version of the LISA test mass, suspended from a thin torsion fibre. This facility will permit measurement of the residual, springlike coupling between the test mass and the sensor and characterization of other stray forces relevant to LISA drag-free control. The expected force sensitivity of the proposed torsion pendulum is limited by the intrinsic thermal noise at ≈3 × 10-13 N Hz-1/2 at 1 mHz. We briefly describe the design and implementation of the apparatus, its expected performance and preliminary experimental data.

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