Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Experimental Astrophysics



+44 (0)20 7594 7552t.sumner




1108Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Armano, M and Audley, H and Baird, J and Binetruy, P and Born, M and Bortoluzzi, D and Castelli, E and Cavalleri, A and Cesarini, A and Cruise, M and Danzmann, K and Silva, MDD and Diepholz, I and Dixon, G and Dolesi, R and Ferraioli, L and Ferroni, V and Finetti, N and Fitzsimons, ED and Freschi, M and Gesa, L and Gibert, F and Giardini, D and Giusteri, R and Grimani, C and Grzymisch, J and Harrison, I and Heinzel, G and Hewitson, M and Hollington, D and Hoyland, D and Hueller, M and Inchauspe, H and Jennrich, O and Jetzer, P and Karnesis, N and Kaune, B and Korsakova, N and Killow, CJ and Lobo, JA and Lloro, I and Liu, L and Lopez-Zaragoza, JP and Maarschalkerweerd, R and Mance, D and Meshskar, N and Martin, V and Martin-Polo, L and Martino, J and Martin-Porqueras, F and Mateos, I and McNamara, PW and Mendes, J and Mendes, L and Nofrarias, M and Paczkowski, S and Perreur-Lloyd, M and Petiteau, A and Pivato, P and Plagnol, E and Ramos-Castro, J and Reiche, J and Robertson, DI and Riva},
doi = {10.1016/j.astropartphys.2018.01.006},
journal = {Astroparticle Physics},
pages = {28--37},
title = {Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation Monitor},
url = {},
volume = {98},
year = {2018}

RIS format (EndNote, RefMan)

AB - Test mass charging caused by cosmic rays will be a significant source ofacceleration noise for space-based gravitational wave detectors like LISA.Operating between December 2015 and July 2017, the technology demonstrationmission LISA Pathfinder included a bespoke monitor to help characterise therelationship between test mass charging and the local radiation environment.The radiation monitor made in situ measurements of the cosmic ray flux whilealso providing information about its energy spectrum. We describe the monitorand present measurements which show a gradual 40% increase in count ratecoinciding with the declining phase of the solar cycle. Modulations of up to10% were also observed with periods of 13 and 26 days that are associated withco-rotating interaction regions and heliospheric current sheet crossings. Thesevariations in the flux above the monitor detection threshold (approximately 70MeV) are shown to be coherent with measurements made by the IREM monitoron-board the Earth orbiting INTEGRAL spacecraft. Finally we use the measureddeposited energy spectra, in combination with a GEANT4 model, to estimate thegalactic cosmic ray differential energy spectrum over the course of themission.
AU - Armano,M
AU - Audley,H
AU - Baird,J
AU - Binetruy,P
AU - Born,M
AU - Bortoluzzi,D
AU - Castelli,E
AU - Cavalleri,A
AU - Cesarini,A
AU - Cruise,M
AU - Danzmann,K
AU - Silva,MDD
AU - Diepholz,I
AU - Dixon,G
AU - Dolesi,R
AU - Ferraioli,L
AU - Ferroni,V
AU - Finetti,N
AU - Fitzsimons,ED
AU - Freschi,M
AU - Gesa,L
AU - Gibert,F
AU - Giardini,D
AU - Giusteri,R
AU - Grimani,C
AU - Grzymisch,J
AU - Harrison,I
AU - Heinzel,G
AU - Hewitson,M
AU - Hollington,D
AU - Hoyland,D
AU - Hueller,M
AU - Inchauspe,H
AU - Jennrich,O
AU - Jetzer,P
AU - Karnesis,N
AU - Kaune,B
AU - Korsakova,N
AU - Killow,CJ
AU - Lobo,JA
AU - Lloro,I
AU - Liu,L
AU - Lopez-Zaragoza,JP
AU - Maarschalkerweerd,R
AU - Mance,D
AU - Meshskar,N
AU - Martin,V
AU - Martin-Polo,L
AU - Martino,J
AU - Martin-Porqueras,F
AU - Mateos,I
AU - McNamara,PW
AU - Mendes,J
AU - Mendes,L
AU - Nofrarias,M
AU - Paczkowski,S
AU - Perreur-Lloyd,M
AU - Petiteau,A
AU - Pivato,P
AU - Plagnol,E
AU - Ramos-Castro,J
AU - Reiche,J
AU - Robertson,DI
AU - Rivas,F
AU - Russano,G
AU - Slutsky,J
AU - Sopuerta,CF
AU - Sumner,T
AU - Texier,D
AU - Thorpe,JI
AU - Vetrugno,D
AU - Vitale,S
AU - Wanner,G
AU - Ward,H
AU - Wass,P
AU - Weber,WJ
AU - Wissel,L
AU - Wittchen,A
AU - Zweifel,P
DO - 10.1016/j.astropartphys.2018.01.006
EP - 37
PY - 2018///
SN - 0927-6505
SP - 28
TI - Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation Monitor
T2 - Astroparticle Physics
UR -
UR -
UR -
VL - 98
ER -