Drop tower tests of the Equivalence Principle

Dittus, Hansjörg; Vodel, W.; Lochmann, S.; Mehls, C.; Nietzsche, Sándor; Glyscinski, J.V. Zameck; Koch, H.

doi:10.1016/s0273-1177(99)00994-1

Cited by 4 publications

(1 citation statement)

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“…These conditions reduce the residual disturbing accelerations to 10 −5 m s −2 in the frequency range below 100 Hz. A further reduction of disturbing accelerations and micro-seismicity down to ∼10 −7 m s −2 is achieved by means of a specially designed free-flying platform located inside the drop capsule [3]. The experimental apparatus consists of a liquid helium cryostat fixed onto the free-flying platform, a vacuum chamber inside the cryostat, and the magnetically shielded test masses falling freely within the vacuum chamber.…”

Section: Introductionmentioning

confidence: 99%

A new experimental baseline for testing the weak equivalence principle at the Bremen drop tower

Dittus

Mehls

2001

Class. Quantum Grav.

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Free-fall experiments to test the weak equivalence principle are in progress at the drop tower in Bremen. The differential acceleration of two test masses made from different materials is being measured by means of a superconductingquantum-interference-device-(SQUID-) based sensing technique. These pseudo-Galilean tests are aimed at determining the Eötvös ratio to an accuracy of better than 10 −12. The free-fall height of the experimental capsules is 110 m, translating into an experimental time of about 4.5 s. The SQUID-based sensing system guarantees a high measuring resolution of 10 −12 m Hz −1/2 for the relative positions of the test masses.

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Section: Introductionmentioning

confidence: 99%