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Beyond the required LISA free-fall performance: new LISA Pathfinder results down to 20 μHz
- Source :
- BASE-Bielefeld Academic Search Engine, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Physical Review Letters, Physical Review Letters 120 (2018), Nr. 6, Phys.Rev.Lett., Phys.Rev.Lett., 2018, 120 (6), pp.061101. ⟨10.1103/PhysRevLett.120.061101⟩, Recercat. Dipósit de la Recerca de Catalunya, instname, Physical Review Letters, 120 (6), Physical Review Letters, American Physical Society, 2018, 120 (6), pp.061101. ⟨10.1103/PhysRevLett.120.061101⟩
- Publication Year :
- 2018
- Publisher :
- American Physical Society, 2018.
-
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/√Hz above 2 mHz and (6±1)×10 fm s−2/√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.<br />Physical Review Letters, 120 (6)<br />ISSN:0031-9007<br />ISSN:1079-7114
- Subjects :
- Astrofísica
General Physics and Astronomy
Astrophysics
Noise figure
01 natural sciences
09 Engineering
LISA Pathfinder
pressure
benchmark
Noise performance
force: electrostatic
Physics
02 Physical Sciences
Noise measurement
Brownian noise
Benchmarking
statistics
frequency
Physical Sciences
European Space Agency
Space probes
performance
General Physics
noise
perturbation
Physics, Multidisciplinary
Experimental benchmarks
calibration: electrostatic
Low frequency
Gravitational waves
Physics and Astronomy (all)
Ones gravitacionals
0103 physical sciences
ddc:530
noise: acceleration
010306 general physics
01 Mathematical Sciences
LISA
Science & Technology
010308 nuclear & particles physics
Gravitational wave
Noise measurements
Física::Electromagnetisme::Ones electromagnètiques [Àrees temàtiques de la UPC]
Low-frequency
Computational physics
Pathfinder
Física::Astronomia i astrofísica [Àrees temàtiques de la UPC]
Differential accelerations
Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Subjects
Details
- Language :
- English
- ISSN :
- 00319007 and 10797114
- Database :
- OpenAIRE
- Journal :
- BASE-Bielefeld Academic Search Engine, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Physical Review Letters, Physical Review Letters 120 (2018), Nr. 6, Phys.Rev.Lett., Phys.Rev.Lett., 2018, 120 (6), pp.061101. ⟨10.1103/PhysRevLett.120.061101⟩, Recercat. Dipósit de la Recerca de Catalunya, instname, Physical Review Letters, 120 (6), Physical Review Letters, American Physical Society, 2018, 120 (6), pp.061101. ⟨10.1103/PhysRevLett.120.061101⟩
- Accession number :
- edsair.doi.dedup.....c1dd6cc1dbc1b7b4551278aecdffb8b3