The ST7 interferometer

Spero, R

doi:10.1088/0264-9381/21/5/030

2004-02-09

Spero, R *

Kuhnert, A

DOI：10.1088/0264-9381/21/5/030

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摘要

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Two homodyne Michelson interferometers aboard the LISA Pathfinder spacecraft will measure the positions of two free-floating test masses, as part of the NASA ST7 mission. The interferometer is required to measure the separation between the test masses with a sensitivity of 30 pm Hz(-1/2) at 10 mHz. The readout scheme is described, error sources are analysed and experimental results are presented.