Now showing items 1-15 of 15

    • Analysis of the accuracy of actuation electronics in the laser interferometer space antenna pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Ramos Castro, Juan José (2020-04-01)
      Article
      Open Access
      The Laser Interferometer Space Antenna Pathfinder (LPF) main observable, labeled ¿g, is the differential force per unit mass acting on the two test masses under free fall conditions after the contribution of all non-gravitational ...
    • Beyond the required LISA free-fall performance: new LISA pathfinder results down to 20 mu Hz 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Ramos Castro, Juan José (American Institute of Physics (AIP), 2018-02-05)
      Article
      Open Access
      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 ...
    • Capacitive sensing of test mass motion with nanometer precision over millimeter-wide sensing gaps for space-borne gravitational reference sensors 

      Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Caleno, M.; Cesarini, A.; Diepholz, I; Dixon, G; Dolesi, R; Ferraioli, L.; Heinzel, G; Hollington, D.; Karnesis, N.; Martín-Porqueras, F.; Fernandez Sopuerta, Carlos; Texier, D.; Vitale, S.; Wanner, G; Ward, Harold; Ramos Castro, Juan José (2017-09-26)
      Article
      Open Access
      We report on the performance of the capacitive gap-sensing system of the Gravitational Reference Sensor on board the LISA Pathfinder spacecraft. From in-flight measurements, the system has demonstrated a performance, down ...
    • Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a forbush decrease with LISA Pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Bassan, M.; Benella, S.; Lobo, J.A.; Ramos Castro, Juan José (2018-02-16)
      Article
      Open Access
      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 ...
    • Charge-induced force noise on free-falling test masses: results from LISA pathfinder 

      Armano, M.; Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Ramos Castro, Juan José (2017-04-26)
      Article
      Open Access
      We report on electrostatic measurements made on board the European Space Agency mission LISA Pathfinder. Detailed measurements of the charge-induced electrostatic forces exerted on free-falling test masses (TMs) inside the ...
    • Constraints on LISA pathfinder's self-gravity: design requirements, estimates and testing procedures 

      Armano, M.; Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Brandt, N.; Bursi, A.; Caleno, M.; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; Ramos Castro, Juan José (2016-11-08)
      Article
      Open Access
      LISA Pathfinder satellite was launched on 3 December 2015 toward the Sun–Earth first Lagrangian point (L1) where the LISA Technology Package (LTP), which is the main science payload, will be tested. LTP achieves measurements ...
    • Forbush decreases and <2 day GCR flux non-recurrent variations studied with LISA pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Benella, S.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (Institute of Physics (IOP), 2019-04-01)
      Article
      Open Access
      Non-recurrent short-term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n-1 were observed between 2016 February 18 and 2017 July 3 on board the European Space Agency LISA Pathfinder (LPF) mission orbiting ...
    • LISA pathfinder micronewton cold gas thrusters: in-flight characterization 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (American Physical Society (APS), 2019-06-28)
      Article
      Open Access
      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 ...
    • LISA pathfinder performance confirmed in an open-loop configuration: results from the free-fall actuation mode 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (American Institute of Physics (AIP), 2019-09-11)
      Article
      Open Access
      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 ...
    • LISA Pathfinder platform stability and drag-free performance 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (American Physical Society (APS), 2019-04-15)
      Article
      Open Access
      The science operations of the LISA Pathfinder mission have demonstrated the feasibility of sub-femto-g free fall of macroscopic test masses necessary to build a gravitational wave observatory in space such as LISA. While ...
    • Measuring the galactic cosmic ray flux with the LISA Pathfinder radiation monitor 

      Armano, M.; Audley, H.; Baird, J.; Ramos Castro, Juan José (2018-01-31)
      Article
      Open Access
      Test mass charging caused by cosmic rays will be a significant source of acceleration noise for space-based gravitational wave detectors like LISA. Operating between December 2015 and July 2017, the technology demonstration ...
    • Novel methods to measure the gravitational constant in space 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (American Physical Society (APS), 2019-09-20)
      Article
      Open Access
      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 ...
    • Precision charge control for isolated free-falling test masses: LISA pathfinder results 

      Armano, M.; Audley, H.; Baird, J.; Ramos Castro, Juan José (American Physical Society (APS), 2018-09-11)
      Article
      Open Access
      The LISA Pathfinder charge management device was responsible for neutralizing the cosmic-ray-induced electric charge that inevitably accumulated on the free-falling test masses at the heart of the experiment. We present ...
    • Spacecraft and interplanetary contributions to the magnetic environment on-board LISA pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; Ramos Castro, Juan José (Oxford University Press, 2020-05-01)
      Article
      Open Access
      LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forces play a key role in the instrument ...
    • Temperature stability in the sub-milliHertz band with LISA Pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (Oxford University Press, 2019-07-01)
      Article
      Open Access
      LISA Pathfinder (LPF) was a technology pioneering mission designed to test key technologies required for gravitational wave detection in space. In the low frequency regime (milliHertz and below), where space-based gravitational ...