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Q-factor determination of detector beam for gravitational interaction experiment
Exploring the limits of the characterization of the Q factor of a vibrating beam in vacuum
Keywords: gravitational experiment
Gravity is one of the four basic forces of physics. It manifests itself in the mutual attraction of masses. It decreases with increasing distance of the masses, but has unlimited range. In contrast to electric or magnetic forces, it is believed that it cannot be shielded. There are still many open questions with respect to gravity. For example, its natural constant G is the least known of all the basic constants of physics.
The project is part of a gravitational experiment to investigate the interaction between an oscillating mass (excitation beam) and a detector mass (detector beam).
The quality-factor (bandwidth, 1/damping) of the detector beam plays a decisive role and directly influences the measurement results. The exact and repeatable determination of the quality-factor (Q-factor) is therefore essential for the success of the experiment.
The aim of the work is to explore the limits of Q-factor measurements of an oscillating beam (Q about 10000) in vacuum for gravitational measurements. The work contains an experimental part, a metrological part as well as a part on the signal analysis. This project can also be realized as group work and split up in the above mentioned parts. For each group participant the topic can be defined independently.
Gravity is one of the four basic forces of physics. It manifests itself in the mutual attraction of masses. It decreases with increasing distance of the masses, but has unlimited range. In contrast to electric or magnetic forces, it is believed that it cannot be shielded. There are still many open questions with respect to gravity. For example, its natural constant G is the least known of all the basic constants of physics. The project is part of a gravitational experiment to investigate the interaction between an oscillating mass (excitation beam) and a detector mass (detector beam). The quality-factor (bandwidth, 1/damping) of the detector beam plays a decisive role and directly influences the measurement results. The exact and repeatable determination of the quality-factor (Q-factor) is therefore essential for the success of the experiment. The aim of the work is to explore the limits of Q-factor measurements of an oscillating beam (Q about 10000) in vacuum for gravitational measurements. The work contains an experimental part, a metrological part as well as a part on the signal analysis. This project can also be realized as group work and split up in the above mentioned parts. For each group participant the topic can be defined independently.