A Vacuum-Compatible Cylindrical Inertial Rotation Sensor with Picoradian Sensitivity
Abstract
We describe an inertial rotation sensor with a 30-cm cylindrical proof-mass suspended from a pair of 14-μm thick BeCu flexures. The angle between the proof-mass and support structure is measured with a pair of homodyne interferometers which achieve a noise level of 5\ prad/Hz. The sensor is entirely made of vacuum compatible materials and the center of mass can be adjusted remotely.
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