Details
| Original language | English |
|---|---|
| Article number | 062001 |
| Number of pages | 19 |
| Journal | Physical Review D |
| Volume | 98 |
| Issue number | 6 |
| Publication status | Published - 11 Sept 2018 |
Abstract
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 measurements made on ground and in flight that quantify the performance of this contactless discharge system which was based on photoemission under UV illumination. In addition, a two-part simulation is described that was developed alongside the hardware. Modeling of the absorbed UV light within the Pathfinder sensor was carried out with the Geant4 software toolkit and a separate Matlab charge transfer model calculated the net photocurrent between the test masses and surrounding housing in the presence of AC and DC electric fields. We confront the results of these models with observations and draw conclusions for the design of discharge systems for future experiments like LISA that will also employ free-falling test masses.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
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In: Physical Review D, Vol. 98, No. 6, 062001, 11.09.2018.
Research output: Contribution to journal › Article › Research
}
TY - JOUR
T1 - Precision charge control for isolated free-falling test masses
T2 - LISA pathfinder results
AU - LISA Pathfinder Collaboration
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, A. M.
AU - Danzmann, K.
AU - De Deus Silva, M.
AU - Diepholz, I.
AU - Dixon, G.
AU - Dolesi, R.
AU - Ferraioli, L.
AU - Ferroni, V.
AU - Fitzsimons, E. D.
AU - Freschi, M.
AU - Gesa, L.
AU - Giardini, D.
AU - Gibert, F.
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 - Inchauspé, H.
AU - Jennrich, O.
AU - Jetzer, P.
AU - Karnesis, N.
AU - Kaune, B.
AU - Korsakova, N.
AU - Killow, C. J.
AU - Liu, L.
AU - Lloro, I.
AU - Lobo, J. A.
AU - López-zaragoza, J. P.
AU - Maarschalkerweerd, R.
AU - Mailland, F.
AU - Mance, D.
AU - Martín, V.
AU - Martin-polo, L.
AU - Martin-porqueras, F.
AU - Martino, J.
AU - Mateos, I.
AU - McNamara, P. W.
AU - Mendes, J.
AU - Mendes, Lucas W
AU - Meshskar, N.
AU - Nofrarias, Miguel
AU - Paczkowski, S.
AU - Perreur-Lloyd, M.
AU - Petiteau, A.
AU - Pfeil, M.
AU - Pivato, P.
AU - Plagnol, E.
AU - Ramos-Castro, J.
AU - Reichel, J.
AU - Robertson, D. I.
AU - Rivas, F.
AU - Russano, G.
AU - Santoruvo, G.
AU - Sarra, P.
AU - Shaul, D.
AU - Slutsky, J.
AU - Sopuerta, Carlos F.
AU - Sumner, Tim J.
AU - Texier, D.
AU - Thorpe, J. I.
AU - Trenkel, Christian
AU - Vetrugno, D.
AU - Vitale, S.
AU - Wanner, Gudrun
AU - Ward, H.
AU - Waschke, S.
AU - Wass, P. J.
AU - Weber, W. J.
AU - Wissel, L.
AU - Wittchen, A.
AU - Zweifel, Philipp
N1 - Funding information: This work has been made possible by the LISA Pathfinder mission, which is part of the space-science program of the European Space Agency. The French contribution has been supported by Centre National d’Etudes Spatiales (CNES) (Accord Specific de Projet No. CNES 1316634/CNRS 103747), the Centre National de la Recherche Scientifique (CNRS), the Observatoire de Paris and the University Paris-Diderot. E. P. and H. I. would also like to acknowledge the financial support of the UnivEarthS Labex program at Sorbonne Paris Cit (Grants No. ANR-10-LABX-0023 and No. ANR-11-IDEX-0005-02). The Albert-Einstein-Institut acknowledges the support of the German Space Agency, Deutsches Zentrum für Luft- und Raumfahrt (DLR). The work is supported by the Federal Ministry for Economic Affairs and Energy based on a resolution of the German Bundestag (Grants No. FKZ 50OQ0501 and No. FKZ 50OQ1601). The Italian contribution has been supported by Agenzia Spaziale Italiana and Instituto Nazionale di Fisica Nucleare. The Spanish contribution has been supported by Contracts No. AYA2010-15709 (MICINN), No. ESP2013-47637-P, and No. ESP2015-67234-P (MINECO). M. N. acknowledges support from Fundacion General Consejo Superior de Investigaciones Científicas (CSIC) Programa ComFuturo. F. R. acknowledges support from a Formacin de Personal Investigador (MINECO) contract. The Swiss contribution acknowledges the support of the Swiss Space Office (SSO) via the PRODEX Programme of ESA. L. F. acknowledges the support of the Swiss National Science Foundation. The UK groups wish to acknowledge support from the United Kingdom Space Agency (UKSA), the University of Glasgow, the University of Birmingham, Imperial College London, and the Scottish Universities Physics Alliance (SUPA). N. K. would like to acknowledge the support of the Newton International Fellowship from the Royal Society. J. I. T. and J. S. acknowledge the support of the U.S. National Aeronautics and Space Administration (NASA).
PY - 2018/9/11
Y1 - 2018/9/11
N2 - 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 measurements made on ground and in flight that quantify the performance of this contactless discharge system which was based on photoemission under UV illumination. In addition, a two-part simulation is described that was developed alongside the hardware. Modeling of the absorbed UV light within the Pathfinder sensor was carried out with the Geant4 software toolkit and a separate Matlab charge transfer model calculated the net photocurrent between the test masses and surrounding housing in the presence of AC and DC electric fields. We confront the results of these models with observations and draw conclusions for the design of discharge systems for future experiments like LISA that will also employ free-falling test masses.
AB - 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 measurements made on ground and in flight that quantify the performance of this contactless discharge system which was based on photoemission under UV illumination. In addition, a two-part simulation is described that was developed alongside the hardware. Modeling of the absorbed UV light within the Pathfinder sensor was carried out with the Geant4 software toolkit and a separate Matlab charge transfer model calculated the net photocurrent between the test masses and surrounding housing in the presence of AC and DC electric fields. We confront the results of these models with observations and draw conclusions for the design of discharge systems for future experiments like LISA that will also employ free-falling test masses.
UR - http://www.scopus.com/inward/record.url?scp=85054497310&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.98.062001
DO - 10.1103/PhysRevD.98.062001
M3 - Article
VL - 98
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 6
M1 - 062001
ER -