Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 102005 |
| Seitenumfang | 22 |
| Fachzeitschrift | Physical Review D |
| Jahrgang | 98 |
| Ausgabenummer | 10 |
| Publikationsstatus | Veröffentlicht - 14 Nov. 2018 |
Abstract
The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July 2017 on the European Space Agency's (ESA) LISA Pathfinder spacecraft. The joint goal of the NASA and ESA missions was to validate key technologies for a future space-based gravitational wave observatory targeting the source-rich millihertz band. The two primary components of ST7-DRS are a micropropulsion system based on colloidal micro-Newton thrusters (CMNTs) and a control system that simultaneously controls the attitude and position of the spacecraft and the two free-flying test masses (TMs). This paper presents our main experimental results and summarizes the overall performance of the CMNTs and control laws. We find the CMNT performance to be consistent with preflight predictions, with a measured system thrust noise on the order of 100 nN/Hz in the 1 mHz≤f≤30 mHz band. The control system maintained the TM-spacecraft separation with an RMS error of less than 2 nm and a noise spectral density of less than 3 nm/Hz in the same band. Thruster calibration measurements yield thrust values consistent with the performance model and ground-based thrust-stand measurements, to within a few percent. We also report a differential acceleration noise between the two test masses with a spectral density of roughly 3 fm/s2/Hz in the 1 mHz≤f≤30 mHz band, slightly less than twice as large as the best performance reported with the baseline LISA Pathfinder configuration and below the current requirements for the Laser Interferometer Space Antenna mission.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik und Astronomie (sonstige)
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in: Physical Review D, Jahrgang 98, Nr. 10, 102005, 14.11.2018.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung
}
TY - JOUR
T1 - Experimental results from the ST7 mission on LISA Pathfinder
AU - LISA Pathfinder Collaboration
AU - Anderson, G.
AU - Anderson, J.
AU - Anderson, M.
AU - Aveni, G.
AU - Bame, D.
AU - Barela, P.
AU - Blackman, K.
AU - Carmain, A.
AU - Cherng, M.
AU - Clark, S.
AU - Connally, M.
AU - Connolly, W.
AU - Conroy, D.
AU - Cooper, M.
AU - Cutler, C.
AU - D’agostino, J.
AU - Demmons, N.
AU - Dorantes, E.
AU - Dunn, C.
AU - Duran, M.
AU - Ehrbar, E.
AU - Evans, J.
AU - Fernandez, J.
AU - Franklin, G.
AU - Girard, M.
AU - Gorelik, J.
AU - Hruby, V.
AU - Hsu, O.
AU - Jackson, D.
AU - Javidnia, S.
AU - Kern, D.
AU - Knopp, M.
AU - Kolasinski, R.
AU - Kuo, C.
AU - Le, T.
AU - Li, I.
AU - Liepack, O.
AU - Littlefield, A.
AU - Maghami, P.
AU - Malik, S.
AU - Markley, L.
AU - Martin, R.
AU - Marrese-reading, C.
AU - Mehta, J.
AU - Mennela, J.
AU - Miller, D.
AU - O’donnell, J.
AU - Danzmann, K.
AU - Hewitson, M.
AU - Karnesis, N.
AU - Chen, L.
AU - Nguyen, Don J.
N1 - Funding information: We acknowledge Dr. Landis Markley for insightful contributions to the design and development of the DRS and DCS. We acknowledge the significant contributions of Jeff DÁgostino and Kathie Blackman of the Hammers Co., who implemented and tested the DCS algorithms in the FSW, and who supplied the corresponding simulators to JPL and ESA. The data were produced by the NASA Disturbance Reduction System payload, developed under the NASA New Millennium Program and hosted on the LISA Pathfinder mission, which was part of the space-science program of the European Space Agency. The work of JPL authors was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration. Dr. J. S. was supported by NASA through the CRESST II cooperative Agreement No. CA 80GSFC17M0002. The French contribution to LISA Pathfinder has been supported by the CNES (Accord Specific de Project No. CNES 1316634/CNRS 103747), the CNRS, the Observatoire de Paris, and the University Paris-Diderot. E. P. and H. I. also acknowledge the financial support of the UnivEarthS Labex program at Sorbonne Paris Cité (ANR-10-LABX-0023 and ANR-11-IDEX-0005-02). The Albert-Einstein-Institut acknowledges the support of the German Space Agency, DLR, in the development and operations of LISA Pathfinder. The work is supported by the Federal Ministry for Economic Affairs and Energy based on a resolution of the German Bundestag (FKZ 50OQ0501 and FKZ 50OQ1601). The Italian contribution to LISA Pathfinder has been supported by Agenzia Spaziale Italiana and Istituto Nazionale di Fisica Nucleare. The Spanish contribution to LISA Pathfinder 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 CSIC (Programa ComFuturo). F. R. acknowledges an FPI contract (MINECO). The Swiss contribution to LISA Pathfinder was made possible by the support of the Swiss Space Office (SSO) via the PRODEX Programme of ESA. L. F. is supported by the Swiss National Science Foundation. The UK LISA Pathfinder groups acknowledge support from the United Kingdom Space Agency (UKSA), the University of Glasgow, the University of Birmingham, Imperial College, and the Scottish Universities Physics Alliance (SUPA).
PY - 2018/11/14
Y1 - 2018/11/14
N2 - The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July 2017 on the European Space Agency's (ESA) LISA Pathfinder spacecraft. The joint goal of the NASA and ESA missions was to validate key technologies for a future space-based gravitational wave observatory targeting the source-rich millihertz band. The two primary components of ST7-DRS are a micropropulsion system based on colloidal micro-Newton thrusters (CMNTs) and a control system that simultaneously controls the attitude and position of the spacecraft and the two free-flying test masses (TMs). This paper presents our main experimental results and summarizes the overall performance of the CMNTs and control laws. We find the CMNT performance to be consistent with preflight predictions, with a measured system thrust noise on the order of 100 nN/Hz in the 1 mHz≤f≤30 mHz band. The control system maintained the TM-spacecraft separation with an RMS error of less than 2 nm and a noise spectral density of less than 3 nm/Hz in the same band. Thruster calibration measurements yield thrust values consistent with the performance model and ground-based thrust-stand measurements, to within a few percent. We also report a differential acceleration noise between the two test masses with a spectral density of roughly 3 fm/s2/Hz in the 1 mHz≤f≤30 mHz band, slightly less than twice as large as the best performance reported with the baseline LISA Pathfinder configuration and below the current requirements for the Laser Interferometer Space Antenna mission.
AB - The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July 2017 on the European Space Agency's (ESA) LISA Pathfinder spacecraft. The joint goal of the NASA and ESA missions was to validate key technologies for a future space-based gravitational wave observatory targeting the source-rich millihertz band. The two primary components of ST7-DRS are a micropropulsion system based on colloidal micro-Newton thrusters (CMNTs) and a control system that simultaneously controls the attitude and position of the spacecraft and the two free-flying test masses (TMs). This paper presents our main experimental results and summarizes the overall performance of the CMNTs and control laws. We find the CMNT performance to be consistent with preflight predictions, with a measured system thrust noise on the order of 100 nN/Hz in the 1 mHz≤f≤30 mHz band. The control system maintained the TM-spacecraft separation with an RMS error of less than 2 nm and a noise spectral density of less than 3 nm/Hz in the same band. Thruster calibration measurements yield thrust values consistent with the performance model and ground-based thrust-stand measurements, to within a few percent. We also report a differential acceleration noise between the two test masses with a spectral density of roughly 3 fm/s2/Hz in the 1 mHz≤f≤30 mHz band, slightly less than twice as large as the best performance reported with the baseline LISA Pathfinder configuration and below the current requirements for the Laser Interferometer Space Antenna mission.
UR - http://www.scopus.com/inward/record.url?scp=85057866844&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.98.102005
DO - 10.1103/PhysRevD.98.102005
M3 - Article
VL - 98
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 10
M1 - 102005
ER -