| Título | In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA |
|---|---|
| Autores | Armano M. , Audley H. , Baird J. , Binetruy P. , Born M. , Bortoluzzi D. , Castelli E. , Cavalleri A. , Cesarini A. , Chiavegato V. , Cruise A.M. , Dal Bosco D. , Danzmann K. , De Deus Silva M. , 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. , López-Zaragoza J.P. , Maarschalkerweerd R. , Mance D. , Martín 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 GARCÍA, FRANCISCO, 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. |
| Publicación externa | No |
| Medio | Phys. Rev. D |
| Alcance | Article |
| Naturaleza | Científica |
| Cuartil JCR | 1 |
| Cuartil SJR | 1 |
| Web | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201763094&doi=10.1103%2fPhysRevD.110.042004&partnerID=40&md5=b48794d09fe983f726b15a5682ef3e09 |
| Fecha de publicacion | 01/01/2024 |
| ISI | 001381834900001 |
| Scopus Id | 2-s2.0-85201763094 |
| DOI | 10.1103/PhysRevD.110.042004 |
| Abstract | 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: (1) The evolution of the Brownian noise that dominates the acceleration amplitude spectral density (ASD), for frequencies f?1 mHz, is consistent with the decaying pressure due to the outgassing of a single gaseous species. (2) Between f=36 µHz and 1 mHz, the acceleration ASD shows a 1/f tail in excess of the Brownian noise of almost constant amplitude, with ?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 µHz, the ASD significantly deviates from the 1/f behavior, because of temperature fluctuations that appear to modulate a quasistatic 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. © 2024 American Physical Society. |
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