A New Apparatus for Measuring Gravity-like Forces at Small Length Scales

Details A New Apparatus for Measuring Gravity-like Forces at Small Length Scales A New Apparatus for Measuring Gravity-like Forces at Small Length Scales

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.d9004w&link_type=abstract

American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #D9.004

Physics

Scientific paper

This talk will discuss the design and construction of a new type of cantilever-based probe for measuring gravity-like forces at length scales of order 10-5 meters. The apparatus is based on a cryogenic helium gas bearing with a hemispherical quartz rotor. The bearing housing contains a silicon nitride cantilever with a metallic test mass mounted on the tip. An alternating pattern of high- and low-density materials is embedded in the flat surface of the rotor so that when the rotor is spun, the mass on the cantilever is subjected to an AC gravitational force. This design combines some of the geometrical advantages of torsion-balance experiments with the small mass size and force sensitivity of our previous cantilever-based experiment.(J. Chiaverini et al., Phys. Rev. Lett. 90 , 151101 (2003))

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