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Sensor Noise in LISA Pathfinder: In-Flight Performance of the Optical Test Mass Readout

Mendes, L.; Russano, G.; Sanjuan, J. +85 more

We report on the first subpicometer interferometer flown in space. It was part of ESA's Laser Interferometer Space Antenna (LISA) Pathfinder mission and performed the fundamental measurement of the positional and angular motion of two free-falling test masses. The interferometer worked immediately, stably, and reliably from switch on until the end…