Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Gibert, Ferran; Nofrarias, Miquel; Karnesis, Nikolaos; Gesa, Lluís; Martín, Víctor; Mateos, Ignacio; Lobo, Alberto; Flatscher, Reinhold; Gerardi, Domenico; Burkhardt, Johannes; Gerndt, Ruediger; Robertson, David; Ward, Henry; McNamara, Paul William; Guzman, Felipe; Hewitson, Martin; Diepholz, Ingo; Reiche, Jens; Heinzel, Gerhard; Danzmann, Karsten

doi:10.1088/0264-9381/32/4/045014

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Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

MPG-Autoren

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Guzman, Felipe
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Hewitson, Martin
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Diepholz, Ingo
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Reiche, Jens
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Heinzel, Gerhard
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann, Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Zitation

Gibert, F., Nofrarias, M., Karnesis, N., Gesa, L., Martín, V., Mateos, I., et al. (2015). Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft. Classical and quantum gravity, 32(4): 045014. doi:10.1088/0264-9381/32/4/045014.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0024-C501-3

Zusammenfassung

During the On-Station Thermal Test campaign of the LISA Pathfinder the data and diagnostics subsystem was tested in nearly space conditions for the first time after integration in the satellite. The results showed the compliance of the temperature measurement system, obtaining temperature noise around $10^{-4}\,{\rm K}\, {\rm Hz}^{-1/2}$ in the frequency band of $1-30\;{\rm mHz}$. In addition, controlled injection of heat signals to the suspension struts anchoring the LISA Technology Package (LTP) Core Assembly to the satellite structure allowed to experimentally estimate for the first time the phase noise contribution through thermo-elastic distortion of the LTP interferometer, the satellite's main instrument. Such contribution was found to be at $10^{-12}\,{\rm m}\, {\rm Hz}^{-1/2}$, a factor of 30 below the measured noise at the lower end of the measurement bandwidth ($1\,{\rm mHz}$).