LISA Pathfinder was a mission designed to test key technologies required for gravitational wave detection in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime, which corresponds to the measurement band of interest for future space-borne gravitational wave observatories. Magnetically induced forces couple to the test mass motion, introducing a contribution to the relative acceleration noise between the free-falling test masses. In this Letter we present the first complete estimate of this term of the instrument performance model. Our results set the magnetic-induced acceleration noise during the February 2017 noise run of 0.25-0.08+0.15 fm s-2/Hz at 1 mHz and 1.01-0.24+0.73 fm s-2/Hz at 0.1 mHz. We also discuss how the nonstationarities of the interplanetary magnetic field can affect these values during extreme space weather conditions.
LISA Pathfinder was a mission designed to test key technologies required for gravitational wave detection in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime, which corresponds to the measurement band of interest for future space-borne gravitational wave observatories. Magnetically induced forces couple to the test mass motion, introducing a contribution to the relative acceleration noise between the free-falling test masses. In this Letter we present the first complete estimate of this term of the instrument performance model. Our results set the magnetic-induced acceleration noise during the February 2017 noise run of 0.25-0.08+0.15 fm s-2/Hz at 1 mHz and 1.01-0.24+0.73 fm s-2/Hz at 0.1 mHz. We also discuss how the nonstationarities of the interplanetary magnetic field can affect these values during extreme space weather conditions.
Magnetic-Induced Force Noise in LISA Pathfinder Free-Falling Test Masses / Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A.M., Danzmann, K., De Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Freschi, M., Gesa, L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 134:7(2025). [10.1103/PhysRevLett.134.071401]
Magnetic-Induced Force Noise in LISA Pathfinder Free-Falling Test Masses
Cesarini A.;Dolesi R.;Ferraioli L.;Ferroni V.;Giusteri R.;Hueller M.;Pivato P.;Russano G.;Sala L.;Vetrugno D.;Vitale S.;Wass P. J.;Weber W. J.;
2025-01-01
Abstract
LISA Pathfinder was a mission designed to test key technologies required for gravitational wave detection in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime, which corresponds to the measurement band of interest for future space-borne gravitational wave observatories. Magnetically induced forces couple to the test mass motion, introducing a contribution to the relative acceleration noise between the free-falling test masses. In this Letter we present the first complete estimate of this term of the instrument performance model. Our results set the magnetic-induced acceleration noise during the February 2017 noise run of 0.25-0.08+0.15 fm s-2/Hz at 1 mHz and 1.01-0.24+0.73 fm s-2/Hz at 0.1 mHz. We also discuss how the nonstationarities of the interplanetary magnetic field can affect these values during extreme space weather conditions.| File | Dimensione | Formato | |
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PhysRevLett.134.071401_magnetic.pdf
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