Beyond the Required LISA Free-Fall Performance: New LISA Pathfinder Results down to 20  μHz

Physical Review Letters
M ArmanoP Zweifel

Abstract

In the months since the publication of the first results, the noise performance of LISA Pathfinder has improved because of reduced Brownian noise due to the continued decrease in pressure around the test masses, from a better correction of noninertial effects, and from a better calibration of the electrostatic force actuation. In addition, the availability of numerous long noise measurement runs, during which no perturbation is purposely applied to the test masses, has allowed the measurement of noise with good statistics down to 20  μHz. The Letter presents the measured differential acceleration noise figure, which is at (1.74±0.05)  fm s^{-2}/sqrt[Hz] above 2 mHz and (6±1)×10  fm s^{-2}/sqrt[Hz] at 20  μHz, and discusses the physical sources for the measured noise. This performance provides an experimental benchmark demonstrating the ability to realize the low-frequency science potential of the LISA mission, recently selected by the European Space Agency.

References

Sep 4, 2008·Physical Review Letters·S E PollackJ H Gundlach
Nov 13, 2009·Physical Review Letters·A CavalleriW J Weber
Jun 12, 2012·Physical Review Letters·F AntonucciW J Weber
May 13, 2017·Physical Review Letters·M ArmanoUNKNOWN LISA Pathfinder Collaboration

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Citations

May 22, 2018·Living Reviews in Relativity·Pau Amaro-Seoane
Jul 1, 2019·The Review of Scientific Instruments·Peter J WassMarkus Pfeil
Apr 2, 2019·Physical Review Letters·Thomas S SchwarzeGerhard Heinzel
May 3, 2020·The Review of Scientific Instruments·M ArmanoP Zweifel
Oct 3, 2020·The Review of Scientific Instruments·N MeshksarD Giardini
Apr 18, 2018·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Iain W MartinCarole Mundell
Apr 26, 2019·Nature·M Coleman Miller, Nicolás Yunes
Nov 25, 2018·Optics Express·David I RobertsonHenry Ward
Nov 22, 2018·Reports on Progress in Physics·Nelson Christensen
Aug 7, 2019·Physical Review Letters·Klaus AbichMarcus Zimmermann
Apr 24, 2021·Physical Review Letters·Kyriakos DestounisKostas D Kokkotas

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