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Novel torsion balance for the measurement of the Newtonian gravitational constant

T J Quinn, C C Speake and R S Davis

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We report on the design and preliminary performance of a novel torsion balance for the measurement of the Newtonian gravitational constant. The design takes advantage of the properties of a wide, heavily loaded torsion strip to enhance the ratio of gravitational signal-to-noise torques beyond that achievable by the traditional Cavendish torsion balance. The results of preliminary experiments suggest that an accuracy of 1 part in 104 should be possible.


PACS

04.80.Nn Gravitational wave detectors and experiments

81.40.Jj Elasticity and anelasticity, stress-strain relations

06.30.Dr Mass and density

81.40.Lm Deformation, plasticity, and creep

07.10.-h Mechanical instruments and equipment

Subjects

Instrumentation and measurement

Condensed matter: structural, mechanical & thermal

Gravitation and cosmology

Dates

Issue 3 (June 1997)



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