Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

Gibert, F. 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)

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Abstract

During the on-station thermal test campaign of the LISA Pathfinder, the 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 K Hz 4 12 in the frequency band 1–30 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 us to experimentally estimate, for the first time, the phase noise contribution through thermo-elastic distortion of the LTP interferometer, the satelliteʼs main instrument. Such contribution was found to be at − − 10 m Hz 12 1 2, a factor of 30 below the measured noise at the lower end of the measurement bandwidth (1 mHz).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Robertson, Dr David and Ward, Professor Henry
Authors: Gibert, F., Nofrarias, M., Karnesis, N., Gesa, L., Martín, V., Mateos, I., Lobo, A., Flatscher, R., Gerardi, D., Burkhardt, J., Gerndt, R., Robertson, D. I., Ward, H., McNamara, P. W., Guzmán, F., Hewitson, M., Diepholz, I., Reiche, J., Heinzel, G., and Danzmann, K.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:IOP Publishing
ISSN:0264-9381
ISSN (Online):1361-6382

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