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Autori principali:	Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Chiavegato, V., Cruise, A. M., Bosco, D. Dal, Danzmann, K., Silva, M. De Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M. S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martın, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D. I., Russano, G., Sala, L., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W. J., Wissel, L., Wittchen, A., Zanoni, C., Zweifel, P.
Natura:	Preprint
Pubblicazione:	2024
Soggetti:	Instrumentation and Methods for Astrophysics
Accesso online:	https://arxiv.org/abs/2405.05207
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_version_	1866909303877664768
author	Armano, M. Audley, H. Baird, J. Binetruy, P. Born, M. Bortoluzzi, D. Castelli, E. Cavalleri, A. Cesarini, A. Chiavegato, V. Cruise, A. M. Bosco, D. Dal Danzmann, K. Silva, M. De Deus Diepholz, I. Dixon, G. Dolesi, R. Ferraioli, L. Ferroni, V. Fitzsimons, E. D. Freschi, M. Gesa, L. Giardini, D. Gibert, F. Giusteri, R. Grimani, C. Grzymisch, J. Harrison, I. Hartig, M. S. Heinzel, G. Hewitson, M. Hollington, D. Hoyland, D. Hueller, M. Inchauspé, H. Jennrich, O. Jetzer, P. Johlander, B. Karnesis, N. Kaune, B. Korsakova, N. Killow, C. J. Lobo, J. A. Lopez-Zaragoza, J. P. Maarschalkerweerd, R. Mance, D. Martın, V. Martin-Polo, L. Martin-Porqueras, F. Martino, J. McNamara, P. W. Mendes, J. Mendes, L. Meshksar, N. Nofrarias, M. Paczkowski, S. Perreur-Lloyd, M. Petiteau, A. Plagnol, E. Ramos-Castro, J. Reiche, J. Rivas, F. Robertson, D. I. Russano, G. Sala, L. Slutsky, J. Sopuerta, C. F. Sumner, T. Texier, D. Thorpe, J. I. Vetrugno, D. Vitale, S. Wanner, G. Ward, H. Wass, P. Weber, W. J. Wissel, L. Wittchen, A. Zanoni, C. Zweifel, P.
author_facet	Armano, M. Audley, H. Baird, J. Binetruy, P. Born, M. Bortoluzzi, D. Castelli, E. Cavalleri, A. Cesarini, A. Chiavegato, V. Cruise, A. M. Bosco, D. Dal Danzmann, K. Silva, M. De Deus Diepholz, I. Dixon, G. Dolesi, R. Ferraioli, L. Ferroni, V. Fitzsimons, E. D. Freschi, M. Gesa, L. Giardini, D. Gibert, F. Giusteri, R. Grimani, C. Grzymisch, J. Harrison, I. Hartig, M. S. Heinzel, G. Hewitson, M. Hollington, D. Hoyland, D. Hueller, M. Inchauspé, H. Jennrich, O. Jetzer, P. Johlander, B. Karnesis, N. Kaune, B. Korsakova, N. Killow, C. J. Lobo, J. A. Lopez-Zaragoza, J. P. Maarschalkerweerd, R. Mance, D. Martın, V. Martin-Polo, L. Martin-Porqueras, F. Martino, J. McNamara, P. W. Mendes, J. Mendes, L. Meshksar, N. Nofrarias, M. Paczkowski, S. Perreur-Lloyd, M. Petiteau, A. Plagnol, E. Ramos-Castro, J. Reiche, J. Rivas, F. Robertson, D. I. Russano, G. Sala, L. Slutsky, J. Sopuerta, C. F. Sumner, T. Texier, D. Thorpe, J. I. Vetrugno, D. Vitale, S. Wanner, G. Ward, H. Wass, P. Weber, W. J. Wissel, L. Wittchen, A. Zanoni, C. Zweifel, P.
contents	We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over the entire course of its science operations, spanning approximately 500 days. We find that: 1) the evolution of the Brownian noise that dominates the acceleration amplitude spectral density (ASD), for frequencies $f\gtrsim 1\,\text{mHz}$, is consistent with the decaying pressure due to the outgassing of a single gaseous species. 2) between $f=36\,μ\text{Hz}$ and $1\,\text{mHz}$, the acceleration ASD shows a $1/f$ tail in excess of the Brownian noise of almost constant amplitude, with $\simeq 20\%$ fluctuations over a period of a few days, with no particular time pattern over the course of the mission; 3) at the lowest considered frequency of $f=18\,μ\text{Hz}$, the ASD significantly deviates from the $1/f$ behavior, because of temperature fluctuations that appear to modulate a quasi-static pressure gradient, sustained by the asymmetries of the outgassing pattern. We also present the results of a projection of the observed acceleration noise on the potential sources for which we had either a direct correlation measurement, or a quantitative estimate from dedicated experiments. These sources account for approximately $40\%$ of the noise power in the $1/f$ tail. Finally, we analyze the possible sources of the remaining unexplained fraction, and identify the possible measures that may be taken to keep those under control in LISA.
format	Preprint
id	arxiv_https___arxiv_org_abs_2405_05207
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA Armano, M. Audley, H. Baird, J. Binetruy, P. Born, M. Bortoluzzi, D. Castelli, E. Cavalleri, A. Cesarini, A. Chiavegato, V. Cruise, A. M. Bosco, D. Dal Danzmann, K. Silva, M. De Deus Diepholz, I. Dixon, G. Dolesi, R. Ferraioli, L. Ferroni, V. Fitzsimons, E. D. Freschi, M. Gesa, L. Giardini, D. Gibert, F. Giusteri, R. Grimani, C. Grzymisch, J. Harrison, I. Hartig, M. S. Heinzel, G. Hewitson, M. Hollington, D. Hoyland, D. Hueller, M. Inchauspé, H. Jennrich, O. Jetzer, P. Johlander, B. Karnesis, N. Kaune, B. Korsakova, N. Killow, C. J. Lobo, J. A. Lopez-Zaragoza, J. P. Maarschalkerweerd, R. Mance, D. Martın, V. Martin-Polo, L. Martin-Porqueras, F. Martino, J. McNamara, P. W. Mendes, J. Mendes, L. Meshksar, N. Nofrarias, M. Paczkowski, S. Perreur-Lloyd, M. Petiteau, A. Plagnol, E. Ramos-Castro, J. Reiche, J. Rivas, F. Robertson, D. I. Russano, G. Sala, L. Slutsky, J. Sopuerta, C. F. Sumner, T. Texier, D. Thorpe, J. I. Vetrugno, D. Vitale, S. Wanner, G. Ward, H. Wass, P. Weber, W. J. Wissel, L. Wittchen, A. Zanoni, C. Zweifel, P. Instrumentation and Methods for Astrophysics We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over the entire course of its science operations, spanning approximately 500 days. We find that: 1) the evolution of the Brownian noise that dominates the acceleration amplitude spectral density (ASD), for frequencies $f\gtrsim 1\,\text{mHz}$, is consistent with the decaying pressure due to the outgassing of a single gaseous species. 2) between $f=36\,μ\text{Hz}$ and $1\,\text{mHz}$, the acceleration ASD shows a $1/f$ tail in excess of the Brownian noise of almost constant amplitude, with $\simeq 20\%$ fluctuations over a period of a few days, with no particular time pattern over the course of the mission; 3) at the lowest considered frequency of $f=18\,μ\text{Hz}$, the ASD significantly deviates from the $1/f$ behavior, because of temperature fluctuations that appear to modulate a quasi-static pressure gradient, sustained by the asymmetries of the outgassing pattern. We also present the results of a projection of the observed acceleration noise on the potential sources for which we had either a direct correlation measurement, or a quantitative estimate from dedicated experiments. These sources account for approximately $40\%$ of the noise power in the $1/f$ tail. Finally, we analyze the possible sources of the remaining unexplained fraction, and identify the possible measures that may be taken to keep those under control in LISA.
title	In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA
topic	Instrumentation and Methods for Astrophysics
url	https://arxiv.org/abs/2405.05207

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