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Transient acceleration events in LISA Pathfinder data: Properties and possible physical origin


Abstract

We present an in depth analysis of the transient events, or glitches, detected at a rate of about one per day in the differential acceleration data of LISA Pathfinder. We show that these glitches fall in two rather distinct categories: fast transients in the interferometric motion readout on one side, and true force transient events on the other. The former are fast and rare in ordinary conditions. The second may last from seconds to hours and constitute the majority of the glitches. We present an analysis of the physical and statistical properties of both categories, including a cross-analysis with other time series like magnetic fields, temperature, and other dynamical variables. Based on these analyses we discuss the possible sources of the force glitches and identify the most likely, among which the outgassing environment surrounding the test-masses stands out. We discuss the impact of these findings on the LISA design and operation, and some risk mitigation measures, including experimental studies that may be conducted on the ground, aimed at clarifying some of the questions left open by our analysis.

Abstract

We present an in depth analysis of the transient events, or glitches, detected at a rate of about one per day in the differential acceleration data of LISA Pathfinder. We show that these glitches fall in two rather distinct categories: fast transients in the interferometric motion readout on one side, and true force transient events on the other. The former are fast and rare in ordinary conditions. The second may last from seconds to hours and constitute the majority of the glitches. We present an analysis of the physical and statistical properties of both categories, including a cross-analysis with other time series like magnetic fields, temperature, and other dynamical variables. Based on these analyses we discuss the possible sources of the force glitches and identify the most likely, among which the outgassing environment surrounding the test-masses stands out. We discuss the impact of these findings on the LISA design and operation, and some risk mitigation measures, including experimental studies that may be conducted on the ground, aimed at clarifying some of the questions left open by our analysis.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Language:English
Date:12 September 2022
Deposited On:18 Feb 2023 17:35
Last Modified:28 Jun 2024 01:42
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Green
Publisher DOI:https://doi.org/10.1103/physrevd.106.062001
Project Information:
  • : FunderInstituto Nazionale di Fisica Nucleare
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  • : FunderUK Space Agency
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  • : FunderScottish Universities Physics Alliance
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  • : FunderUniversity of Glasgow
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  • : FunderUniversity of Birmingham
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  • : FunderImperial College London
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  • : FunderSNSF
  • : Grant ID162449
  • : Project TitleScience of measurement from LISA Pathfinder to space-based gravitational waves observatories
  • : FunderSNSF
  • : Grant ID185051
  • : Project TitleDevelopment and Application of Seismological Techniques for the Analysis of Gravitational Waves Signals in LISA
  • : FunderDeutsches Zentrum für Luft- und Raumfahrt
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  • : FunderNational Aeronautics and Space Administration
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  • : FunderConsejo Superior de Investigaciones Científicas
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  • : FunderMinisterio de Economía y Competitividad
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  • : FunderCentre National de la Recherche Scientifique
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  • : FunderObservatoire de Paris, Université de Recherche Paris Sciences et Lettres
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  • : FunderUniversity Paris-Diderot
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  • : FunderSwiss Space Office
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  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)