Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation 
Monitor

Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Castelli, E.; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; de Deus Silva, M.; Diepholz, I.; Dixon, G.; Dolesi, R.; Ferraioli, L.; Ferroni, V.; Finetti, N.; Fitzsimons, E. D.; Freschi, M.; Gesa, L.; Gibert, F.; Giardini, D.; Giusteri, R.; Grimani, C.; Grzymisch, J.; Harrison, I.; Heinzel, G.; Hewitson, M.; Hollington, D; Hoyland, D; Hueller, M.; Inchauspe, H.; Jennrich, O.; Jetzer, P.; Karnesis, N.; Kaune, B.; Korsakova, N.; Killow, C. J.; Lobo, J. A.; Lloro, I.; Liu, L.; Lopez-Zaragoza, J. P.; Maarschalkerweerd, R.; Mance, D.; Meshskar, N.; Martin, V.; Martin-Polo, L.; Martino, J.; Martin-Porqueras, F.; Mateos, I.; McNamara, P. W.; Mendes, J.; Mendes, L.; Nofrarias, M.; Paczkowski, S.; Perreur-Lloyd, M.; Petiteau, A.; Pivato, P.; Plagnol, E.; Ramos-Castro, J.; Reiche, J.; Robertson, D. I.; Rivas, F.; Russano, G.; Slutsky, J.; Sopuerta, C. F.; Sumner, T.; Texier, D.; Thorpe, J. I.; Vetrugno, D.; Vitale, S.; Wanner, G.; Ward, H.; Wass, P.; Weber, W. J.; Wissel, L.; Wittchen, A.; Zweifel, P.

doi:10.1016/j.astropartphys.2018.01.006

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Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation Monitor

MPG-Autoren

Audley, H.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Binetruy, P.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40430

Born, M.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40437

Danzmann, K.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40441

Diepholz, I.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40460

Heinzel, G.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40525

Hewitson, M.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Karnesis, N.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons215671

Kaune, B.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons215675

Paczkowski, S.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40486

Reiche, J.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40507

Wanner, G.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons231196

Wissel, L.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons231198

Wittchen, A.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Zitation

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., et al. (2018). Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation Monitor. Astroparticle Physics, 98, 28-37. doi:10.1016/j.astropartphys.2018.01.006.

Zitierlink: https://hdl.handle.net/21.11116/0000-0000-8067-B

Zusammenfassung

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
mission LISA Pathfinder included a bespoke monitor to help characterise the
relationship between test mass charging and the local radiation environment.
The radiation monitor made in situ measurements of the cosmic ray flux while
also providing information about its energy spectrum. We describe the monitor
and present measurements which show a gradual 40% increase in count rate
coinciding with the declining phase of the solar cycle. Modulations of up to
10% were also observed with periods of 13 and 26 days that are associated with
co-rotating interaction regions and heliospheric current sheet crossings. These
variations in the flux above the monitor detection threshold (approximately 70
MeV) are shown to be coherent with measurements made by the IREM monitor
on-board the Earth orbiting INTEGRAL spacecraft. Finally we use the measured
deposited energy spectra, in combination with a GEANT4 model, to estimate the
galactic cosmic ray differential energy spectrum over the course of the
mission.