Testing the equivalence principle on a trampoline

Details Testing the equivalence principle on a trampoline Testing the equivalence principle on a trampoline

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cqgra..18.2435r&link_type=abstract

Classical and Quantum Gravity, Volume 18, Issue 13, pp. 2435-2445 (2001).

Physics

1

Scientific paper

We are developing a Galilean test of the equivalence principle in which two pairs of test mass assemblies (TMA) are in free fall in a comoving vacuum chamber for about 0.9 s. The TMA are tossed upward, and the process repeats at 1.2 s intervals. Each TMA carries a solid quartz retroreflector and a payload mass of about one-third of the total TMA mass. The relative vertical motion of the TMA of each pair is monitored by a laser gauge working in an optical cavity formed by the retroreflectors. Single-toss precision of the relative acceleration of a single pair of TMA is 3.5×10-12 g. The project goal of Δg/g = 10-13 can be reached in a single night's run, but repetition with altered configurations will be required to ensure the correction of systematic error to the nominal accuracy level. Because the measurements can be made quickly, we plan to study several pairs of materials.

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