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1. A capacitive detector to test the principle of equivalence in a free fall experiment

Author

F. De Martini, E. Pace, and F. Melchiorri

Subjects
Physics, Capacitive sensing, Acoustics, Detector, Vacuum tube, law.invention, Acceleration, Classical mechanics, Transducer, Gravitational field, law, Calibration, Equivalence principle, Instrumentation
Abstract

We describe a system of capacitive transducers applied to two free falling objects with the aim of detecting differential accelerations due to nonNewtonian components. The two objects have a cylindrical shape to minimize the systematic errors and they fall in a microgravity condition inside a vacuum tube released by a stratospheric balloon at an altitude of 40 km. The calibration of the capacitive transducers performed in laboratory has shown that it is possible to detect differential accelerations Δa ≲ 1.4 × 10−10 m s−2.

Published
1992
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