期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.061101
关键词
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资金
- CNES [CNES 1316634/CNRS 103747]
- CNRS
- Observatoire de Paris
- University Paris-Diderot
- UnivEarthS Labex program at Sorbonne Paris Cite [ANR-10-LABX-0023, ANR-11-IDEX-0005-02]
- German Space Agency, DLR
- Federal Ministry for Economic Affairs and Energy [FKZ 50OQ0501, FKZ 50OQ1601]
- Agenzia Spaziale Italiana
- Instituto Nazionale di Fisica Nucleare
- Fundacion General CSIC (Programa ComFuturo)
- Swiss Space Office (SSO) via the PRODEX Program of ESA
- Swiss National Science Foundation
- United Kingdom Space Agency (UKSA)
- University of Glasgow
- University of Birmingham
- Imperial College
- Scottish Universities Physics Alliance (SUPA)
- U.S. National Aeronautics and Space Administration (NASA)
- Newton International Fellowship from the Royal Society
- [AYA2010-15709]
- [ESP2013-47637-P]
- [ESP2015-67234-P]
- Science and Technology Facilities Council [Gravitational Waves, 1510841, ST/N005422/1, ST/R00188X/1] Funding Source: researchfish
- UK Space Agency [ST/I00617X/1, PP/D507258/1, ST/P005462/1, ST/S002480/1, ST/H000356/1] Funding Source: researchfish
- STFC [ST/N005422/1, Gravitational Waves] Funding Source: UKRI
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 mu Hz. The Letter presents the measured differential acceleration noise figure, which is at (1.74 +/- 0.01) fm s(-2)/root Hz above 2 mHz and (6 +/- 1) x 10 fm s(-2)/root Hz at 20 mu Hz, 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.
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