Precision charge control for isolated free-falling test masses: LISA pathfinder results

Armano, M. et al. (2018) Precision charge control for isolated free-falling test masses: LISA pathfinder results. Physical Review D, 98(6), 062001. (doi:10.1103/PhysRevD.98.062001)

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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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Korsakova, Dr Natalia and Perreur-Lloyd, Mr Michael and Killow, Dr Christian and Ward, Professor Henry and Robertson, Dr David
Authors: Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Liu, L., Lloro, I., Lobo, J. A., López-Zaragoza, J. P., Maarschalkerweerd, R., Mailland, F., Mance, D., Martín, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshskar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pfeil, M., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Santoruvo, G., Sarra, P., Shaul, D., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Trenkel, C., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Waschke, S., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:2470-0010
ISSN (Online):2470-0029
Published Online:11 September 2018
Copyright Holders:Copyright © 2018 American Physical Society
First Published:First published in Physical Review D 98(6): 062001
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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