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1. Sensor noise in LISA Pathfinder: An extensive in-flight review of the angular and longitudinal interferometric measurement system

Author

M. Armano, H. Audley, J. Baird, P. Binetruy, M. Born, D. Bortoluzzi, N. Brandt, E. Castelli, A. Cavalleri, A. Cesarini, A. M. Cruise, K. Danzmann, M. de Deus Silva, I. Diepholz, G. Dixon, R. Dolesi, L. Ferraioli, V. Ferroni, E. D. Fitzsimons, R. Flatscher, M. Freschi, A. García, R. Gerndt, L. Gesa, D. Giardini, F. Gibert, R. Giusteri, C. Grimani, J. Grzymisch, F. Guzman, I. Harrison, M-S Hartig, G. Hechenblaikner, G. Heinzel, M. Hewitson, D. Hollington, D. Hoyland, M. Hueller, H. Inchauspé, O. Jennrich, P. Jetzer, U. Johann, B. Johlander, N. Karnesis, B. Kaune, C. J. Killow, N. Korsakova, J. A. Lobo, J. P. López-Zaragoza, R. Maarschalkerweerd, D. Mance, V. Martín, L. Martin-Polo, F. Martin-Porqueras, J. Martino, P. W. McNamara, J. Mendes, L. Mendes, N. Meshksar, A. Monsky, M. Nofrarias, S. Paczkowski, M. Perreur-Lloyd, A. Petiteau, E. Plagnol, J. Ramos-Castro, J. Reiche, F. Rivas, D. I. Robertson, G. Russano, J. Sanjuan, J. Slutsky, C. F. Sopuerta, F. Steier, T. Sumner, D. Texier, J. I. Thorpe, D. Vetrugno, S. Vitale, V. Wand, G. Wanner, H. Ward, P. J. Wass, W. J. Weber, L. Wissel, A. Wittchen, P. Zweifel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Observatoire de la Côte d'Azur (OCA), and Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
interferometer: performance, LISA, satellite, measurement methods, detector: noise, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], sensitivity, interferometer: stability
Abstract

Physical Review D, 106 (8), ISSN:1550-7998, ISSN:0556-2821, ISSN:1550-2368

Published
2022

2. LISA Pathfinder Performance Confirmed in an Open-Loop Configuration: Results from the Free-Fall Actuation Mode

Author

N. Korsakova, M. de Deus Silva, Lluis Gesa, Gerhard Heinzel, W. J. Weber, Daniele Bortoluzzi, L. Mendes, J. Grzymisch, James Ira Thorpe, Ph. Jetzer, Miquel Nofrarías, H. Ward, Jacob Slutsky, Valerio Ferroni, R. Maarschalkerweerd, A. Cesarini, G. Russano, D. Hoyland, J. Baird, D. I. Robertson, Domenico Giardini, I. Harrison, Peter Zweifel, M. Born, Antoine Petiteau, Mauro Hueller, Rita Dolesi, Peter Wass, Oliver Jennrich, A. M. Cruise, Paul McNamara, J. Martino, Davor Mance, G. Dixon, Karsten Danzmann, J. Reiche, D. Texier, Ingo Diepholz, S. Vitale, Michael Perreur-Lloyd, L. Wissel, M. S. Hartig, Nikolaos Karnesis, Carlos F. Sopuerta, F. Rivas, R. Giusteri, E. D. Fitzsimons, Christian J. Killow, Daniele Vetrugno, Heather Audley, N. Meshksar, A. Wittchen, Eric Plagnol, V. Martín, Gudrun Wanner, Catia Grimani, Juan Ramos-Castro, B. Kaune, Michele Armano, Antonella Cavalleri, L. Martin-Polo, M. Freschi, P. Pivato, Pierre Binétruy, T. J. Sumner, L. Liu, E. Castelli, José F. F. Mendes, M. Hewitson, F. Martin-Porqueras, J. P. López-Zaragoza, Ignacio Mateos, Ferran Gibert, Luigi Ferraioli, Daniel Hollington, J. A. Lobo, S. Paczkowski, H. Inchauspe, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Science and Technology Facilities Council (STFC), Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
General Physics, Physics, Multidisciplinary, FOS: Physical sciences, General Physics and Astronomy, Actuation noise, Impulse (physics), Gravitation and Astrophysics, 01 natural sciences, LISA Pathfinder, Article, Atomic physics, Gravitational waves, Física::Electromagnetisme::Radiació infraroja, visible i ultraviolada [Àrees temàtiques de la UPC], Physics - Space Physics, Ones gravitacionals, Control theory, Force calibration, 0103 physical sciences, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, Science & Technology, 02 Physical Sciences, Noise measurement, Gravitational wave, Noise measurements, article, Open-loop controller, noise measurement, Dominant factor, acceleration, Space physics, calibration, Space Physics (physics.space-ph), Pathfinder, Mode of operations, Physical Sciences, Differential accelerations, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Open-loop configuration, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Space probes, Quasistatic process
Abstract

We report on the results of the LISA Pathfinder (LPF) free-fall mode experiment, in which the control force needed to compensate the quasistatic differential force acting on two test masses is applied intermittently as a series of "impulse" forces lasting a few seconds and separated by roughly 350 s periods of true free fall. This represents an alternative to the normal LPF mode of operation in which this balancing force is applied continuously, with the advantage that the acceleration noise during free fall is measured in the absence of the actuation force, thus eliminating associated noise and force calibration errors. The differential acceleration noise measurement presented here with the free-fall mode agrees with noise measured with the continuous actuation scheme, representing an important and independent confirmation of the LPF result. An additional measurement with larger actuation forces also shows that the technique can be used to eliminate actuation noise when this is a dominant factor. © 2019 authors. Published by the American Physical Society.

Published
2019

3. Novel methods to measure the gravitational constant in space

Author

J. P. López-Zaragoza, Ferran Gibert, S. Paczkowski, Antoine Petiteau, Paul McNamara, J. A. Lobo, Luigi Ferraioli, L. Wissel, Domenico Giardini, F. Rivas, Gerhard Heinzel, W. J. Weber, Daniele Bortoluzzi, L. Mendes, Carlos F. Sopuerta, B. Kaune, Gudrun Wanner, M. S. Hartig, N. Meshksar, Miquel Nofrarías, Juan Ramos-Castro, Víctor S. Martín, F. Martin-Porqueras, Daniele Vetrugno, M. de Deus Silva, Daniel Hollington, Davor Mance, Pierre Binétruy, T. J. Sumner, L. Liu, A. M. Cruise, Ph. Jetzer, Lluis Gesa, D. Texier, E. Castelli, Christian J. Killow, Jacob Slutsky, Valerio Ferroni, James Ira Thorpe, R. Maarschalkerweerd, J. Baird, A. Wittchen, Antonella Cavalleri, P. Pivato, José F. F. Mendes, J. Reiche, D. Hoyland, E. D. Fitzsimons, A. Cesarini, G. Russano, Nikolaos Karnesis, M. Born, N. Korsakova, Michael Perreur-Lloyd, R. Giusteri, Eric Plagnol, Karsten Danzmann, Catia Grimani, G. Dixon, S. Vitale, M. Hewitson, Ingo Diepholz, Peter Zweifel, Peter Wass, Rita Dolesi, L. Martin-Polo, J. Grzymisch, H. Ward, D. I. Robertson, Michele Armano, M. Freschi, J. Martino, C. Trenkel, Ian Harrison, Henri Inchauspe, M. Hueller, Heather Audley, Oliver Jennrich, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), LISA Pathfinder, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Astrofísica, Physics, 010308 nuclear & particles physics, General physics, Mechanics, Astrophysics, Space (mathematics), 01 natural sciences, Measure (mathematics), Cosmology, Laboratory studies of gravity, Gravitation, Gravitational constant, Acceleration, Pathfinder, cosmic rays, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], 0103 physical sciences, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Experiments in gravity, 010306 general physics, Suspension (vehicle), cosmology, Cosmology and astrophysics
Abstract

International audience; We present two novel methods, tested by LISA Pathfinder, to measure the gravitational constant G for the first time in space. Experiment 1 uses electrostatic suspension forces to measure a change in acceleration of a test mass due to a displaced source mass. Experiment 2 measures a change in relative acceleration between two test masses due to a slowly varying fuel tank mass. Experiment 1 gave a value of G=6.71±0.42(×10-11) m3 s-2 kg-1 and experiment 2 gave 6.15±0.35(×10-11) m3 s-2 kg-1, both consistent with each other to 1σ and with the CODATA 2014 recommended value of 6.67408±0.00031(×10-11) m3 s-2 kg-1 to 2σ. We outline several ideas to improve the results for a future experiment, and we suggest that a measurement in space would isolate many terrestrial issues that could be responsible for the inconsistencies between recent measurements.

Published
2019

4. LISA Pathfinder micronewton cold gas thrusters: In-flight characterization

Author

Nikolaos Karnesis, N. Korsakova, Jacob Slutsky, Valerio Ferroni, Daniele Vetrugno, Davor Mance, S. Paczkowski, D. Texier, Henri Inchauspe, G. Dixon, Ivan Lloro, D. Hoyland, Luigi Ferraioli, M. de Deus Silva, P. Pivato, L. Wissel, Ignacio Mateos, J. Grzymisch, Ph. Jetzer, P. Zweifel, Antonella Cavalleri, T. J. Sumner, L. Liu, N. Meshksar, Daniele Bortoluzzi, L. Mendes, Peter Wass, E. Castelli, F. Rivas, E. D. Fitzsimons, Pierre Binétruy, Lluis Gesa, S. Vitale, Heather Audley, F. Martin-Porqueras, R. Giusteri, J. Martino, A. M. Cruise, Michele Armano, R. Maarschalkerweerd, D. I. Robertson, A. Wittchen, Antoine Petiteau, Paul McNamara, Daniel Hollington, Gudrun Wanner, Miquel Nofrarías, Juan Ramos-Castro, M. Freschi, Catia Grimani, Carlos F. Sopuerta, Christian J. Killow, J. Baird, M. Hueller, Oliver Jennrich, Rita Dolesi, M. Born, Eric Plagnol, Domenico Giardini, J. A. Lobo, James Ira Thorpe, Ingo Diepholz, José F. F. Mendes, J. Reiche, A. Cesarini, G. Russano, M. Hewitson, W. J. Weber, L. Martin-Polo, H. Ward, I. Harrison, Michael Perreur-Lloyd, J. P. López-Zaragoza, Karsten Danzmann, Ferran Gibert, B. Kaune, Víctor S. Martín, Gerhard Heinzel, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), LISA Pathfinder, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Inertial frame of reference, Gravitational-wave observatory, noise: low, satellite, Propulsion, 01 natural sciences, 7. Clean energy, Gravitational waves, cosmic rays, Ones gravitacionals, gas, 0103 physical sciences, Experiments in gravity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Aerospace engineering, Física::Relativitat::Gravitació [Àrees temàtiques de la UPC], 010306 general physics, accelerator: design, Physics, LISA, Spacecraft, 010308 nuclear & particles physics, business.industry, electronics, Astrophysics::Instrumentation and Methods for Astrophysics, stability, Metrology, Pathfinder, Harmonics, Physics::Space Physics, control system, business, cosmology, performance, Space environment, ejection
Abstract

International audience; The LISA Pathfinder (LPF) mission has demonstrated the ability to limit and measure the fluctuations in acceleration between two free falling test masses down to sub-femto-g levels. One of the key elements to achieve such a level of residual acceleration is the drag free control. In this scheme the spacecraft is used as a shield against any external disturbances by adjusting its relative position to a reference test mass. The actuators used to move the spacecraft are cold gas micropropulsion thrusters. In this paper, we report in-flight characterization of these thrusters in term of noise and artefacts during science operations using all the metrology capabilities of LISA Pathfinder. Using the LISA Pathfinder test masses as an inertial reference frame, an average thruster noise of ∼0.17 μN/Hz is observed and decomposed into a common (coherent) and an uncorrelated component. The very low noise and stability of the onboard metrology system associated with the quietness of the space environment allowed the measurement of the thruster noise down to ∼20 μHz, more than an order of magnitude below any ground measurement. Spectral lines were observed around ∼1.5 mHz and its harmonics and around 55 and 70 mHz. They are associated with the cold gas system itself and possibly to a clock synchronization issue. The thruster noise-floor exhibits an excess of ∼70% compared to characterization that have been made on ground on a single unit and without the feeding system. However this small excess has no impact on the LPF mission performance and is compatible with the noise budget for the upcoming LISA gravitational wave observatory. Over the whole mission, nominal, and extension, the thrusters showed remarkable stability for both the science operations and the different maneuvers necessary to maintain LPF on its orbit around L1. It is therefore concluded that a similar cold gas system would be a viable propulsion system for the future LISA mission.

Published
2019

5. Characteristics and Energy Dependence of Recurrent Galactic Cosmic-Ray Flux Depressions and of a Forbush Decrease with LISA Pathfinder

Author

C. Zenoni, Lluis Gesa, J. Martino, A. Zambotti, Gerhard Heinzel, R. Maarschalkerweerd, A. Wittchen, I. Harrison, L. Martin-Polo, N. Korsakova, Stefano Vitale, Luis Mendes, J. A. Lobo, Marco Freschi, Nikolaos Karnesis, Jacob Slutsky, Valerio Ferroni, B. Kaune, D. Hoyland, Antoine Petiteau, L. Wissel, Daniele Bortoluzzi, Paul McNamara, T. J. Sumner, L. Liu, Pierre Binétruy, Carlos F. Sopuerta, Catia Grimani, Antonella Cavalleri, Ignacio Mateos, Heather Audley, Daniele Vetrugno, Miquel Nofrarías, J. Baird, Massimo Bassan, Monica Laurenza, Davor Mance, M. Born, Federico Sabbatini, F. Martin-Porqueras, James Ira Thorpe, Michele Armano, A. M. Cruise, Philippe Jetzer, E. D. Fitzsimons, Christian J. Killow, Karsten Danzmann, J. Grzymisch, H. Ward, J. Reiche, P. Pivato, D. I. Robertson, Henri Inchauspe, Ingo Diepholz, A. Cesarini, G. Russano, M. Fabi, M. de Deus Silva, Mauro Hueller, R. Giusteri, G. Dixon, Peter Wass, S. Paczkowski, N. Finetti, F. Rivas, Peter Zweifel, Rita Dolesi, Oliver Jennrich, Eric Plagnol, Michael Perreur-Lloyd, Gudrun Wanner, Domenico Giardini, Juan Ramos-Castro, Vicente Martín, Daniel Hollington, Simone Benella, Daniele Telloni, Ivan Lloro, J. P. López-Zaragoza, Ferran Gibert, Damien Texier, Luigi Ferraioli, José F. F. Mendes, M. Hewitson, W. J. Weber, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
Astrofísica, solar–terrestrial relations, 010504 meteorology & atmospheric sciences, 0306 Physical Chemistry (Incl. Structural), [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], interferometers [instrumentation], Astrophysics, 01 natural sciences, 0305 Organic Chemistry, 27-DAY VARIATION, Physics - Space Physics, Coronal mass ejection, Astrophysics::Solar and Stellar Astrophysics, cosmic rays, instrumentation: interferometers, interplanetary medium, solar-terrestrial relations, Sun: heliosphere, Sun: rotation, 010303 astronomy & astrophysics, Sun rotation, Solar–terrestrial relations, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics, High Energy Astrophysical Phenomena (astro-ph.HE), heliosphere [Sun], Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Space physics, charged particle, solar, ELECTRONS, CORONAL MASS EJECTIONS, interferometers, Sun: rotation [cosmic rays, instrumentation], Astrophysics - Solar and Stellar Astrophysics, SOLAR-WIND, cosmic radiation: galaxy, Physical Sciences, Physics::Space Physics, Solar rotation, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, cosmic radiation: flux, Astrophysics::High Energy Astrophysical Phenomena, HELIOSPHERIC MODULATION, Interplanetary medium, FOS: Physical sciences, Cosmic ray, rotation [Sun], Astronomy & Astrophysics, 0103 physical sciences, PARTICLES, Forbush decrease, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], instrumentation interferometers, SPACED DATA, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Sun heliosphere, solar terrestrial relations, SPECTRUM, LISA, Science & Technology, cosmic radiation: energy spectrum, INTENSITY, POSITRONS, Astronomy and Astrophysics, Space Physics (physics.space-ph), cosmic rays, instrumentation interferometers, interplanetary medium, solar terrestrial relations, Sun heliosphere, Sun rotation, 0201 Astronomical And Space Sciences, monitoring, 13. Climate action, Space and Planetary Science, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], charged particle: detector, Interplanetary spaceflight, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Heliosphere
Abstract

The final publication is available at IOS Press through http://dx.doi.org/10.3847/1538-4357/aaa774 Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin. A high counting rate particle detector (PD) aboard LISA Pathfinder, meant for subsystems diagnostics, was devoted to the measurement of GCR and solar energetic particle integral fluxes above 70 MeV n-1 up to 6500 counts s-1. PD data were gathered with a sampling time of 15 s. Characteristics and energy dependence of GCR flux recurrent depressions and of a Forbush decrease dated 2016 August 2 are reported here. The capability of interplanetary missions, carrying PDs for instrument performance purposes, in monitoring the passage of interplanetary coronal mass ejections is also discussed.

Published
2018

6. Experimental results from the ST7 mission on LISA Pathfinder

Author

S. Vitale, W. Warner, Lluis Gesa, J. Fernandez, Nikolaos Karnesis, M. Connally, R. Kolasinski, J. Martino, Thomas Randolph, Gerhard Heinzel, R. Maarschalkerweerd, A. Wittchen, J. Gorelik, Eric Ehrbar, S. Rhodes, Ian Harrison, J. Wellman, J. A. Lobo, Thomas Roy, O. Hsu, A. Carmain, Oliver Jennrich, G. Dixon, M. Cherng, Charley Dunn, Henri Inchauspe, Ivan Lloro, D. Miller, F. Rivas, Luigi Ferraioli, L. Chen, D. Kern, L. Markley, Heather Audley, José F. F. Mendes, E. Dorantes, Gudrun Wanner, Peter Wass, S. Paczkowski, T. Le, Juan Ramos-Castro, R. Valencia, Jacob Slutsky, Valerio Ferroni, William E. Connolly, Pierre Binétruy, L. Wissel, H. Umfress, R. Parikh, D. Hoyland, T. J. Sumner, John R. Anderson, L. Liu, M. Hewitson, L. Mendes, E. Castelli, Vlad Hruby, Antonella Cavalleri, N. Korsakova, O. Liepack, Shahram Javidnia, Miquel Nofrarías, John J. Evans, Michele Armano, C. Kuo, M. Freschi, Daniel Hollington, Garth Franklin, Douglas J. Jackson, G. Aveni, K. Blackman, M. Hueller, Christian J. Killow, M. S. Anderson, J. P. López-Zaragoza, M. Born, Ingo Diepholz, S. Malik, N. Meshksar, Ryan Martin, S. Clark, Nate Demmons, Douglas Spence, Ferran Gibert, J. Stocky, W. Tolman, Ignacio Mateos, D. Conroy, Ira Thorpe, G. Plett, Phil Barela, A. Littlefield, Peter Willis, J. D’Agostino, M. Cooper, A. M. Cruise, D. Bortoluzzi, Catia Grimani, M. Duran, M. de Deus Silva, H. Shaw, F. Martin-Porqueras, J. Reiche, A. Cesarini, G. Russano, J. Grzymisch, H. Ward, E. D. Fitzsimons, Peter Zweifel, R. Giusteri, Ph. Jetzer, M. Knopp, T. Ramsey, D. I. Robertson, J. Mehta, Domenico Giardini, W. J. Weber, M. Girard, Rita Dolesi, L. Martin-Polo, Colleen Marrese-Reading, Karsten Danzmann, D. Bame, I. Li, Eric Plagnol, B. Kaune, Víctor S. Martín, C. Valerio, Andrew Romero-Wolf, D. Nguyen, J. Baird, Greg M. Anderson, Michael Perreur-Lloyd, Peiman Maghami, Davor Mance, D. Texier, John Ziemer, J. Tallon, Antoine Petiteau, Paul McNamara, A. Ruiz, Carlos F. Sopuerta, J. O’Donnell, Daniele Vetrugno, Curt Cutler, J. Mennela, P. Pivato, Jurg Zwahlen, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ST7, LISA Pathfinder, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and ST7 Team

Subjects
detector: technology, Space technology, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), engineering, FOS: Physical sciences, Thrust, Astronomy & Astrophysics, 01 natural sciences, 7. Clean energy, Noise (electronics), Physics, Particles & Fields, cosmic rays, 0103 physical sciences, Experiments in gravity, thrust, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Aerospace engineering, noise: acceleration, 010306 general physics, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), activity report, Physics, LISA, Science & Technology, Spacecraft, density: spectral, business.industry, Payload, Noise spectral density, Pathfinder, Physical Sciences, control system, business, Astrophysics - Instrumentation and Methods for Astrophysics, cosmology, performance
Abstract

The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July of 2017 on the European Space Agency's LISA Pathfinder spacecraft. The joint goal of the NASA and ESA missions was to validate key technologies for a future space-based gravitational wave observatory targeting the source-rich milliHertz band. The two primary components of ST7-DRS are a micropropulsion system based on colloidal micro-Newton thrusters (CMNTs) and a control system that simultaneously controls the attitude and position of the spacecraft and the two free-flying test masses (TMs). This paper presents our main experimental results and summarizes the overall the performance of the CMNTs and control laws. We find that the CMNT performance to be consistent with pre-flight predictions, with a measured system thrust noise on the order of $100\,\textrm{nN}/\sqrt{\textrm{Hz}}$ in the $1\,\textrm{mHz}\leq f \leq 30\,\textrm{mHz}$ band. The control system maintained the TM-spacecraft separation with an RMS error of less than 2$\,$nm and a noise spectral density of less than $3\,\textrm{nm}/\sqrt{\textrm{Hz}}$ in the same band. Thruster calibration measurements yield thrust values consistent with the performance model and ground-based thrust-stand measurements, to within a few percent. We also report a differential acceleration noise between the two test masses with a spectral density of roughly $3\,\textrm{fm}/\textrm{s}^2/\sqrt{\textrm{Hz}}$ in the $1\,\textrm{mHz}\leq f \leq 30\,\textrm{mHz}$ band, slightly less than twice as large as the best performance reported with the baseline LISA Pathfinder configuration and below the current requirements for the Laser Interferometer Space Antenna (LISA) mission.

Published
2018

7. Sub-Femto- g Free Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results

Author

R. Gerndt, F. Rivas, Daniele Bortoluzzi, L. Carbone, L. Mendes, Ph. Jetzer, Walter Fichter, Jacob Slutsky, Valerio Ferroni, D. Hoyland, Ulrich Johann, Gudrun Wanner, Miquel Nofrarías, Peter Wass, Juan Ramos-Castro, Pierre Binétruy, Ivan Lloro, Lluis Gesa, G. Auger, C. Trenkel, Stefano Vitale, James Ira Thorpe, Antoine Petiteau, A. Grynagier, Paul McNamara, A. F. García Marín, G. Congedo, Luigi Ferraioli, M. Born, R. Maarschalkerweerd, Karsten Danzmann, V Wand, C. Zanoni, A. Monsky, Ruggero Stanga, Ingo Diepholz, Carlos F. Sopuerta, F. Steier, A. Cesarini, José F. F. Mendes, Tobias Ziegler, N. Korsakova, G. Russano, F. Guzmán, H. Rozemeijer, M. Hewitson, A. Schleicher, B. Johlander, J. P. López-Zaragoza, Michael Perreur-Lloyd, Michele Armano, Daniel Hollington, Daniele Vetrugno, D. Wealthy, B. Kaune, S. Madden, P. Sarra, A. Zambotti, M. Diaz-Aguilo, Christian J. Killow, Peter Zweifel, Davor Mance, D. Shaul, T. J. Sumner, L. Liu, J. Grzymisch, H. Ward, M. Freschi, L. Di Fiore, Oliver Jennrich, Michael Tröbs, H. B. Tu, R. Flatscher, M. Caleno, D. I. Robertson, J. A. Lobo, S. Paczkowski, Ferran Gibert, L. Martin-Polo, P. Prat, I. Harrison, P. Pivato, Ignacio Mateos, C. García Marirrodriga, Mauro Hueller, D. Texier, A. Wittchen, U. Ragnit, Aniello Grado, Heather Audley, J Sanjuán, C. Warren, J. Reiche, B. Rais, Henri Inchauspe, G. Dixon, Eric Plagnol, V. Martín, Domenico Giardini, Daniele Nicolodi, N. Brandt, Nikolaos Karnesis, Giacomo Ciani, Antonella Cavalleri, J. Martino, R. Giusteri, L. Wissel, Rita Dolesi, J. Baird, Massimo Bassan, R. De Rosa, E. D. Fitzsimons, Gerhard Heinzel, W. J. Weber, A. M. Cruise, F. Martin-Porqueras, M. de Deus Silva, N. Dunbar, Catia Grimani, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, UK Space Agency, Science and Technology Facilities Council (STFC), Armano, M., Audley, H., Auger, G., Baird, J. T., Bassan, M., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Caleno, M., Carbone, L., Cavalleri, A., Cesarini, A., Ciani, G., Congedo, G., Cruise, A. M., Danzmann, K., De Deus Silva, M., DE ROSA, Rosario, Diaz Aguiló, M., Di Fiore, L., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fichter, W., Fitzsimons, E. D., Flatscher, R., Freschi, M., García Marín, A. F., García Marirrodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Guzmán, F., Grado, A., Grimani, C., Grynagier, A., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johann, U., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., López Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin Polo, L., Martino, J., Martin Porqueras, F., Madden, S., Mateos, I., Mcnamara, P. W., Mendes, J., Mendes, L., Monsky, A., Nicolodi, D., Nofrarias, M., Paczkowski, S., Perreur Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Raïs, B., Ramos Castro, J., Reiche, J., Robertson, D. I., Rozemeijer, H., Rivas, F., Russano, G., Sanjuán, J., Sarra, P., Schleicher, A., Shaul, D., Slutsky, J., Sopuerta, C. F., Stanga, R., Steier, F., Sumner, T., Texier, D., Thorpe, J. I., Trenkel, C., Tröbs, M., Tu, H. B., Vetrugno, D., Vitale, S., Wand, V., Wanner, G., Ward, H., Warren, C., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., Ziegler, T., Zweifel, P., Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
General Physics, Gravitational-wave observatory, detector: performance, Physics, Multidisciplinary, General Physics and Astronomy, Astrophysics, 01 natural sciences, 7. Clean energy, Noise (electronics), 09 Engineering, LISA Pathfinder, Gravitational waves, Acceleration, Physics and Astronomy (all), Square root, Ones gravitacionals, gas, 0103 physical sciences, Orders of magnitude (speed), interferometer: satellite, noise: acceleration, 010303 astronomy & astrophysics, 01 Mathematical Sciences, MISSION, Physics, LISA, Science & Technology, 02 Physical Sciences, density: spectral, 010308 nuclear & particles physics, Gravitational wave, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, gravitational radiation, Spectral density, gravitational radiation detector: satellite, detector: sensitivity, gravitation, Physical Sciences, viscosity, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Brownian noise, readout, INTERFEROMETER
Abstract

We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a relative acceleration noise with a square root of the power spectral density of 5.2 +/- 0.1 fm s(exp -2)/square root of Hz, or (0.54 +/- 0.01) x 10(exp -15) g/square root of Hz, with g the standard gravity, for frequencies between 0.7 and 20 mHz. This value is lower than the LISA Pathfinder requirement by more than a factor 5 and within a factor 1.25 of the requirement for the LISA mission, and is compatible with Brownian noise from viscous damping due to the residual gas surrounding the test masses. Above 60 mHz the acceleration noise is dominated by interferometer displacement readout noise at a level of (34.8 +/- 0.3) fm square root of Hz, about 2 orders of magnitude better than requirements. At f less than or equal to 0.5 mHz we observe a low-frequency tail that stays below 12 fm s(exp -2)/square root of Hz down to 0.1 mHz. This performance would allow for a space-based gravitational wave observatory with a sensitivity close to what was originally foreseen for LISA.

Published
2016

8. A noise simulator for eLISA: Migrating LISA Pathfinder knowledge to the eLISA mission

Author

Ferran Gibert, Daniele Vetrugno, H. Ward, Peter Wass, P. Pivato, S. Wen, Tobias Ziegler, J. Reiche, J. Gallegos, N. Korsakova, A. Cesarini, G. Russano, Gerhard Heinzel, Michele Armano, Michael Perreur-Lloyd, B. Kaune, Antoine Petiteau, S. Madden, M. Freschi, N. Brandt, Paul McNamara, Luigi Ferraioli, S. Paczkowski, Henri Inchauspe, Peter Zweifel, Nikolaos Karnesis, S. Waschke, A. Moroni, Tamara Sumner, Carlos F. Sopuerta, R. Giusteri, Ph. Jetzer, Christian J. Killow, José F. F. Mendes, U. Ragnit, J. Huesler, Daniele Bortoluzzi, L. Mendes, Ivan Lloro, Ignacio Mateos, Heather Audley, C. García Marirrodriga, P. Sarra, A. Schleicher, I. Harrison, H. B. Tu, Miquel Nofrarías, Pierre Binétruy, Rita Dolesi, Mauro Hueller, B. Johlander, Karsten Danzmann, Davor Mance, W. J. Weber, C. Trenkel, Jacob Slutsky, Valerio Ferroni, N. Dunbar, Catia Grimani, D. Texier, C. Zanoni, D. Wealthy, R. Gerndt, Martin Hewitson, Daniel Hollington, Oliver Jennrich, Ewan Fitzsimons, J. Baird, S. Vitale, Antonella Cavalleri, M. Cruise, P. Prat, A. Bursi, F. Martin-Porqueras, Lluis Gesa, G. Auger, R. Maarschalkerweerd, A. Wittchen, H. Rozemeijer, James Ira Thorpe, Domenico Giardini, J. A. Romera Perez, Eric Plagnol, V. Martín, M. Caleno, D. I. Robertson, Gudrun Wanner, Juan Ramos-Castro, M. Born, Ingo Diepholz, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
History, noise, Astronomy, Residual, Astrophysics, programming, LISA Pathfinder, Education, Physics, Applied, System imperfections, Acceleration, Simulators, numerical methods, State space, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], MATLAB, Instrumental noise, numerical calculations, Simulation, Dewey Decimal Classification::500 | Naturwissenschaften, Konferenzschrift, computer.programming_language, Constellation, Physics, LISA, Spacecraft, business.industry, Noise (signal processing), Computer Science Applications, Pathfinder, Free fall, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], On state, ddc:500, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Residual acceleration, business, computer, Space probes, performance
Abstract

We present a new technical simulator for the eLISA mission, based on state space modeling techniques and developed in MATLAB. This simulator computes the coordinate and velocity over time of each body involved in the constellation, i.e. the spacecraft and its test masses, taking into account the different disturbances and actuations. This allows studying the contribution of instrumental noises and system imperfections on the residual acceleration applied on the TMs, the latter reflecting the performance of the achieved free-fall along the sensitive axis. A preliminary version of the results is presented. Sorbonne Paris Cite/UnivEarthS Labex French Space Agency (CNES)

Published
2014

9. Bayesian statistics for the calibration of the LISA Pathfinder experiment

Author

M Armano, H Audley, G Auger, P Binetruy, M Born, D Bortoluzzi, N Brandt, A Bursi, M Caleno, A Cavalleri, A Cesarini, M Cruise, K Danzmann, I Diepholz, R Dolesi, N Dunbar, L Ferraioli, V Ferroni, E Fitzsimons, M Freschi, C García Marirrodriga, R Gerndt, L Gesa, F Gibert, D Giardini, R Giusteri, C Grimani, I Harrison, G Heinzel, M Hewitson, D Hollington, M Hueller, J Huesler, H Inchauspé, O Jennrich, P Jetzer, B Johlander, N Karnesis, B Kaune, N Korsakova, C Killow, I Lloro, R Maarschalkerweerd, S Madden, D Mance, V Martin, F Martin-Porqueras, I Mateos, P McNamara, J Mendes, E Mitchell, A Moroni, M Nofrarias, S Paczkowski, M Perreur-Lloyd, P Pivato, E Plagnol, P Prat, U Ragnit, J Ramos-Castro, J Reiche, J A Romera Perez, D Robertson, H Rozemeijer, G Russano, P Sarra, A Schleicher, J Slutsky, C F Sopuerta, T Sumner, D Texier, J Thorpe, C Trenkel, H B Tu, D Vetrugno, S Vitale, G Wanner, H Ward, S Waschke, P Wass, D Wealthy, S Wen, W Weber, A Wittchen, C Zanoni, T Ziegler, P Zweifel, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
History, MATLAB, detector: satellite, Calibration (statistics), Astronomy, Bayesian probability, Lisa technology packages, Gravity waves, computer.software_genre, Astrophysics, Bayesian statistics, 01 natural sciences, Degrees of freedom (mechanics), LISA Pathfinder, Education, Physics, Applied, Gravitational wave detectors, Theoretical physics, Matlab toolboxes, Operational simulations, 0103 physical sciences, numerical methods, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], noise: acceleration, 010306 general physics, Dewey Decimal Classification::500 | Naturwissenschaften, Konferenzschrift, Mathematics, Data processing, 010308 nuclear & particles physics, Design of experiments, System identification, statistical analysis: Bayesian, Analysis strategies, gravitational radiation detector, Computer Science Applications, Pathfinder, LISA: calibration, gravitational radiation: emission, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Bayesian Analysis, Noise (video), Data mining, ddc:500, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, computer, Space probes
Abstract

The main goal of LISA Pathfinder (LPF) mission is to estimate the acceleration noise models of the overall LISA Technology Package (LTP) experiment on-board. This will be of crucial importance for the future space-based Gravitational-Wave (GW) detectors, like eLISA. Here, we present the Bayesian analysis framework to process the planned system identification experiments designed for that purpose. In particular, we focus on the analysis strategies to predict the accuracy of the parameters that describe the system in all degrees of freedom. The data sets were generated during the latest operational simulations organised by the data analysis team and this work is part of the LTPDA Matlab toolbox. A post-publication change was made to this article on 26 Jun 2020 to add an author.

Published
2014

10. The LISA Pathfinder interferometryhardware and system testing

Author

H. Ward, S. Strandmoe, A. Monsky, Gudrun Wanner, M. Schulte, Juan Ramos-Castro, Felipe Guzman, Peter Wass, Gerhard Heinzel, A.M. Taylor, D. Fertin, Walter Fichter, Davor Mance, Michael Perreur-Lloyd, D. Gerardi, C. Trenkel, D. Hoyland, V. Wand, X. Llamas, Matteo Benedetti, Heather Audley, D. Texier, D. Nicolini, A. Perreca, J. A. Romera Perez, B. Rais, C. Boatella, Michele Armano, Eric Plagnol, J. Bogenstahl, Ignacio Mateos, Philippe Jetzer, M. Freschi, Ulrich Johann, Daniele Bortoluzzi, M. Diaz-Aguilo, Karsten Danzmann, F. Pedersen, D. Tombolato, Ivan Lloro, B. Guillaume, D. Shaul, J. Huesler, P. Prat, W. J. Weber, A. Lobo, M. Caleno, J. H. Hough, A. Conchillo, T. J. Sumner, O. Jeannin, I. Harrison, Miquel Nofrarías, Giuseppe D. Racca, D. I. Robertson, Domenico Giardini, F. Antonucci, Frank Steier, Rita Dolesi, M. Cesa, C. García Marirrodriga, M. Cruise, L. Stagnaro, S. Waschke, M. Chmeissani, Mauro Hueller, Stefano Vitale, J. Reiche, I. Cristofolini, Ewan Fitzsimons, G. Dixon, H. Rozemeijer, Pierre Binétruy, B. Johlander, Daniele Nicolodi, S. Madden, A. F. Garcia Marin, Giacomo Ciani, Christian J. Killow, Ingo Diepholz, Peter Zweifel, Antonella Cavalleri, F. De Marchi, P. Luetzow-Wentzky, Catia Grimani, J. Fauste, Lluis Gesa, Oliver Jennrich, G. Auger, Martin Hewitson, Daniel Hollington, R. Maarschalkerweerd, A. Grynagier, Paul McNamara, Gerald Hechenblaikner, J. Sanjuan, Paolo Bosetti, R. Gerndt, F. Gibert, E. Mitchell, José F. F. Mendes, G. Congedo, Luigi Ferraioli, Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft, EADS Astrium GmbH, Gruppo Collegato di Trento, Istituto Nazionale di Fisica Nucleare (INFN), European Space Astronomy Centre (ESAC), European Space Agency (ESA), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), DCT / AQ / EC, Centre National d'Études Spatiales [Toulouse] (CNES), European Space Technology Centre, Institut de Física d’Altes Energies [Barcelone] (IFAE), Universitat Autònoma de Barcelona (UAB), Department of Physics [Gainesville] (UF|Physics), University of Florida [Gainesville] (UF), Facultat de Ciències, Institut d'Estudis Espacials de Catalunya (IEEC-CSIC), School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], EPSC, Institut für Flugmechanik und Flugregelung, SUPA School of Physics and Astronomy [Glasgow], University of Glasgow, Institut für Geophysik [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Istituto di Fisica, INFN Urbino, NASA Goddard Space Flight Center (GSFC), European Space Operations Centre, Blackett Laboratory, Imperial College London, Institut für Theoretische Physik, Universität Zürich [Zürich] = University of Zurich (UZH), NTE-SENER, Departament d'Enginyeria Electrònica [Barcelona], Astrium Ltd, APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, APC - THEORIE, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut für theoretische Physik, Universität Hamburg (UHH)-Universität Hamburg (UHH), LISA, Agence Spatiale Européenne = European Space Agency (ESA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), European Space Research and Technology Centre (ESTEC), National Institute for Nuclear Physics (INFN), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Universitat Autònoma de Barcelona [Barcelona] (UAB), Department of Physics [Gainesville], University of Florida [Gainesville], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Universität Zürich [Zürich] (UZH), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut für theoretische Physik

Subjects
Physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Integration testing, business.industry, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 99.55.Ym, System testing, 01 natural sciences, 04.80.Nn, 07.60.Ly, Toolbox, Test (assessment), [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Interferometry, Pathfinder, 0103 physical sciences, Data analysis, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], 010306 general physics, MATLAB, business, computer, Computer hardware, computer.programming_language
Abstract

International audience; The LISA Pathfinder interferometry- hardware and system testing 2 Abstract. Preparations for the LISA Pathfinder mission have reached an exciting stage. Tests of the engineering model (EM) of the optical metrology system (OMS) have recently been completed at the Albert Einstein Institute, Hannover, and flight model (FM) tests are now underway. Significantly, they represent the first complete integration and testing of the space-qualified hardware and are the first tests on an optical system level. The results and test procedures of these campaigns will be utilised directly in the ground-based flight hardware tests, and subsequently during in-flight operations. In addition, they allow valuable testing of the data analysis methods using the MATLAB based LTP data analysis (LTPDA) toolbox. This paper presents an overview of the results from the EM test campaign that was successfully completed in December 2009. The LISA Pathfinder interferometry- hardware and system testing 3

Published
2011

11. LISA Pathfinder data analysis

Author

Lluis Gesa, G. Auger, R. Maarschalkerweerd, S. Strandmoe, Ivan Lloro, Gudrun Wanner, Juan Ramos-Castro, X. Llamas, Antonella Cavalleri, Karsten Danzmann, Michele Armano, S. Madden, A. Perreca, D. Fertin, M. Freschi, H. Rozemeijer, I. Harrison, M. Schulte, Ignacio Mateos, M. Cesa, Pierre Binétruy, D. Shaul, D. Texier, Michael Perreur-Lloyd, O. Jeannin, Paolo Bosetti, C. García Marirrodriga, T. J. Sumner, J. Fauste, Felipe Guzman, A. Monsky, B. Guillaume, M. Caleno, Gerhard Heinzel, Ingo Diepholz, D. I. Robertson, M. Chmeissani, Mauro Hueller, P. Prat, Peter Wass, D. Mance, A. Conchillo, Ewan Fitzsimons, A.M. Taylor, J. H. Hough, A. Grynagier, H. Ward, Paul McNamara, A. Lobo, D. Nicolini, D. Tombolato, Giuseppe D. Racca, Matteo Benedetti, F. Antonucci, J. Reiche, C. Trenkel, G. Dixon, G. Congedo, Luigi Ferraioli, J. Huesler, J. A. Romera Perez, Giacomo Ciani, J. Sanjuan, B. Rais, C. Boatella, Eric Plagnol, Domenico Giardini, Frank Steier, M. Diaz-Aguilo, Peter Zweifel, Oliver Jennrich, F. De Marchi, Daniele Bortoluzzi, F. Pedersen, E. Mitchell, José F. F. Mendes, Catia Grimani, Daniele Nicolodi, I. Cristofolini, Philippe Jetzer, Christian J. Killow, Miquel Nofrarías, Rita Dolesi, W. J. Weber, A. F. Garcia Marin, L. Stagnaro, Martin Hewitson, Daniel Hollington, B. Johlander, Heather Audley, S. Waschke, J. Bogenstahl, M. Cruise, Stefano Vitale, Walter Fichter, D. Hoyland, APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), APC - THEORIE, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut für theoretische Physik, Universität Hamburg (UHH)-Universität Hamburg (UHH), Centre National d'Études Spatiales [Toulouse] (CNES), LISA, Gruppo Collegato di Trento, Istituto Nazionale di Fisica Nucleare (INFN), European Space Astronomy Centre (ESAC), European Space Agency (ESA), Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft, DCT / AQ / EC, European Space Technology Centre, Institut de Física d’Altes Energies [Barcelone] (IFAE), Universitat Autònoma de Barcelona (UAB), Department of Physics [Gainesville] (UF|Physics), University of Florida [Gainesville] (UF), ICE, Institut d'Estudis Espacials de Catalunya (IEEC-CSIC), School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], EPSC, Institut für Flugmechanik und Flugregelung, SUPA School of Physics and Astronomy [Glasgow], University of Glasgow, Institut für Geophysik [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Istituto di Fisica, INFN Urbino, NASA Goddard Space Flight Center (GSFC), European Space Operations Centre, Blackett Laboratory, Imperial College London, Institut für Theoretische Physik, Universität Zürich [Zürich] = University of Zurich (UZH), NTE-SENER, Université Paris Diderot - Paris 7 (UPD7), Departament d'Enginyeria Electrònica [Barcelona], Astrium Ltd, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut für theoretische Physik, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), National Institute for Nuclear Physics (INFN), Universitat Autònoma de Barcelona [Barcelona] (UAB), Department of Physics [Gainesville], University of Florida [Gainesville], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Universität Zürich [Zürich] (UZH), Agence Spatiale Européenne = European Space Agency (ESA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and European Space Research and Technology Centre (ESTEC)

Subjects
Physics, Mission operations, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 01 natural sciences, Phase (combat), [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Noise, Identification (information), Pathfinder, Full data, Physical Sciences, 0103 physical sciences, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Systems engineering, Key (cryptography), Satellite, 010303 astronomy & astrophysics
Abstract

International audience; As the launch of LISA Pathfinder draws near, more and more effort is being put in to the preparation of the data analysis activities that will be carried out during the mission operations. The operations phase of the mission will be composed of a series of experiments that will be carried out on the satellite. These experiments will be directed and analysed by the data analysis team, which is part of the operations team. The operations phase will last about 90 days, during which time the data analysis team aims to fully characterise the LISA Pathfinder satellite, and in particular, its core instrument the LISA Technology Package. By analysing the various couplings present in the system, the different noise sources that will disturb the system, and through the identification of the key physical parameters of the system, a detailed noise budget of the instrument will be constructed that will allow the performance of the different subsystems to be assessed and projected towards LISA. This paper describes the various aspects of the full data analysis chain that are needed to successfully characterise LPF and build up the noise budget during mission operations.

Published
2011

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