A New Test of the Principle of Equivalence

Details A New Test of the Principle of Equivalence A New Test of the Principle of Equivalence

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dda....31.1501r&link_type=abstract

American Astronomical Society, DDA Meeting #31, #15.01; Bulletin of the American Astronomical Society, Vol. 32, p.870

Astronomy and Astrophysics

Astrophysics

Scientific paper

We are developing a new laboratory test, in the Galilean tradition, of the Principle of Equivalence. In this test, two samples fall in a single co-moving vacuum chamber, as their vertical separation is measured with a laser gauge. The moving system, including a small getter pump, is guided by a heavy structure, built to minimize vibration. Free-fall time is about one sec, and the system recycles in about 0.3 sec. Our preliminary objective is to measure delta-g/g with an uncertainty of 10-11; long term, 10-13. A detailed error budget, based on a large number of falls, supports these objectives. Once a useful accuracy is achieved, we plan to test several types of matter. The experiment will also be sensitive to intermediate-range forces, such as might result from a Yukawa potential. Since the Principle of Equivalence undergirds general relativity, an apparent violation would receive considerable interest and correspondingly severe scrutiny. This work has been supported by the Smithsonian Astrophysical Observatory.

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