Title :
Design of an interferometric displacement sensor with picometer resolution for the Galileo-Galilei mission
Author :
Pisani, Marco ; Mana, Giovanni ; Nobili, Anna M.
Author_Institution :
Ist. Naz. di Ricerca Metrol., Turin, Italy
Abstract :
The Galileo-Galilei (GG) mission aims at testing the Weak Equivalence Principle. It requires the measurement of the differential displacement between two test masses with a resolution of 1 pm/√Hz at 1 Hz. An optical interferometer has been designed to the purpose. The principle and the preliminary design of the interferometer will be illustrated.
Keywords :
gravitation; light interferometers; Galileo-Galilei mission; differential displacement measurement; interferometric displacement sensor; optical interferometer; picometer resolution; weak equivalence principle; Detectors; Diffraction; Extraterrestrial measurements; Laser beams; Measurement by laser beam; Mirrors; Optical interferometry; Laser interferometer;
Conference_Titel :
Metrology for Aerospace (MetroAeroSpace), 2015 IEEE
Conference_Location :
Benevento
DOI :
10.1109/MetroAeroSpace.2015.7180724
