Low-frequency Ground Rotation Sensors for Advanced Gravitational Wave Detectors

Joshua John McCann

Research output: ThesisDoctoral Thesis

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Gravitational wave detectors require the highest level of vibration isolation of any experiment in human history. To achieve this isolation, scientists and engineers use various techniques from passive damping to active control. Active control requires extremely sensitive sensors. This thesis presents work undertaken to develop one of the world's most sensitive ground rotation accelerometers, utilising micro flexures, optical sensing and electromagnetic feedback. Known as A Low-Frequency Rotational Accelerometer ALFRA, the sensor successfully demonstrates the ability to measure ground rotation down to one-hundredth of apico-radian at frequencies of 50mHz and above.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
  • Zhao, Chunnong, Supervisor
  • Ju, Li, Supervisor
Thesis sponsors
Award date7 Dec 2021
Publication statusUnpublished - 2021


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