Optical Control of a Torsion Balance as a Low-Noise Test Platform (B06)

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The underlying principle of gravity-related satellite missions is sensing the purely gravity driven motion of freely floating test masses. These test masses must be carefully protected from all non-gravitational forces. The preferred experimental approach to measure such tiny forces on ground are torsion balances. Within the project, we aim to establish laser-interferometry as the primary readout technique in order to overcome limitations of torsion balances. The main goal is to establish the torsion balance as a reliable, high-precision test bed for the measurement of very small forces and accelerations.