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

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.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-8067-B Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E804-4
Genre: Journal Article

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Armano, M., Author
Audley, H.1, Author
Baird, J., Author
Binetruy, P.1, Author
Born, M.2, Author              
Bortoluzzi, D., Author
Castelli, E., Author
Cavalleri, A., Author
Cesarini, A., Author
Cruise, M., Author
Danzmann, K.2, Author              
de Deus Silva, M. , Author
Diepholz, I.2, Author              
Dixon, G., Author
Dolesi, R., Author
Ferraioli, L., Author
Ferroni, V., Author
Finetti, N., Author
Fitzsimons, E. D., Author
Freschi, M., Author
Gesa, L., AuthorGibert, F., AuthorGiardini, D., AuthorGiusteri, R., AuthorGrimani, C., AuthorGrzymisch, J., AuthorHarrison, I., AuthorHeinzel, G.2, Author              Hewitson, M.3, Author              Hollington, D, AuthorHoyland, D, AuthorHueller, M., AuthorInchauspe, H., AuthorJennrich, O., AuthorJetzer, P., AuthorKarnesis, N.1, AuthorKaune, B.2, Author              Korsakova, N., AuthorKillow, C. J., AuthorLobo, J. A., AuthorLloro, I., AuthorLiu, L., AuthorLopez-Zaragoza, J. P., AuthorMaarschalkerweerd, R., AuthorMance, D., AuthorMeshskar, N., AuthorMartin, V., AuthorMartin-Polo, L., AuthorMartino, J., AuthorMartin-Porqueras, F., AuthorMateos, I., AuthorMcNamara, P. W., AuthorMendes, J., AuthorMendes, L., AuthorNofrarias, M., AuthorPaczkowski, S.2, Author              Perreur-Lloyd, M., AuthorPetiteau, A., AuthorPivato, P., AuthorPlagnol, E., AuthorRamos-Castro, J., AuthorReiche, J.2, Author              Robertson, D. I., AuthorRivas, F., AuthorRussano, G., AuthorSlutsky, J., AuthorSopuerta, C. F., AuthorSumner, T., AuthorTexier, D., AuthorThorpe, J. I., AuthorVetrugno, D., AuthorVitale, S., AuthorWanner, G.2, Author              Ward, H., AuthorWass, P., AuthorWeber, W. J., AuthorWissel, L.1, AuthorWittchen, A., AuthorZweifel, P., Author more..
Affiliations:
1AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24009              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
3Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: 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.

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 Dates: 2017-11-202018-01-122018
 Publication Status: Published in print
 Pages: -
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 Identifiers: arXiv: 1711.07427
DOI: 10.1016/j.astropartphys.2018.01.006
URI: http://arxiv.org/abs/1711.07427
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Title: Astroparticle Physics
Source Genre: Journal
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Pages: - Volume / Issue: 98 Sequence Number: - Start / End Page: 28 - 37 Identifier: -