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 = {Anderson, G and Anderson, J and Anderson, M and Aveni, G and Bame, D and Barela, P and Blackman, K and Carmain, A and Chen, L and Cherng, M and Clark, S and Connally, M and Connolly, W and Conroy, D and Cooper, M and Cutler, C and D'Agostino, J and Demmons, N and Dorantes, E and Dunn, C and Duran, M and Ehrbar, E and Evans, J and Fernandez, J and Franklin, G and Girard, M and Gorelik, J and Hruby, V and Hsu, O and Jackson, D and Javidnia, S and Kern, D and Knopp, M and Kolasinski, R and Kuo, C and Le, T and Li, I and Liepack, O and Littlefield, A and Maghami, P and Malik, S and Markley, L and Martin, R and Marrese-Reading, C and Mehta, J and Mennela, J and Miller, D and Nguyen, D and O'Donnell, J and Parikh, R and Plett, G and Ramsey, T and Randolph, T and Rhodes, S and Romero-Wolf, A and Roy, T and Ruiz, A and Shaw, H and Slutsky, J and Spence, D and Stocky, J and Tallon, J and Thorpe, I and Tolman, W and Umfress, H and Valencia, R and Valerio, C and Warner, W and Wellman, J and Willi},
doi = {10.1103/PhysRevD.98.102005},
journal = {Physical Review D},
title = {Experimental results from the ST7 mission on LISA Pathfinder},
url = {},
volume = {98},
year = {2018}

RIS format (EndNote, RefMan)

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.
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 - Chen,L
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 - Nguyen,D
AU - O'Donnell,J
AU - Parikh,R
AU - Plett,G
AU - Ramsey,T
AU - Randolph,T
AU - Rhodes,S
AU - Romero-Wolf,A
AU - Roy,T
AU - Ruiz,A
AU - Shaw,H
AU - Slutsky,J
AU - Spence,D
AU - Stocky,J
AU - Tallon,J
AU - Thorpe,I
AU - Tolman,W
AU - Umfress,H
AU - Valencia,R
AU - Valerio,C
AU - Warner,W
AU - Wellman,J
AU - Willis,P
AU - Ziemer,J
AU - Zwahlen,J
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,AM
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,ED
AU - Freschi,M
AU - Gesai,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 - Jenntich,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 - Meshksar,N
AU - Martin,V
AU - Martin-Polo,L
AU - Martino,J
AU - Martin-Porqueras,F
AU - Mateos,I
AU - McNatnara,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,D
AU - Rivas,F
AU - Russano,G
AU - Sopuerta,CF
AU - Sumner,T
AU - Texier,D
AU - Vetrugno,D
AU - Vitale,S
AU - Wanner,G
AU - Ward,H
AU - Wass,PJ
AU - Weber,WJ
AU - Wissel,L
AU - Wittchen,A
AU - Zweifel,P
DO - 10.1103/PhysRevD.98.102005
PY - 2018///
SN - 2470-0010
TI - Experimental results from the ST7 mission on LISA Pathfinder
T2 - Physical Review D
UR -
UR -
UR -
VL - 98
ER -