Ground based 2DoF test for LISA and LISA PF

Stanga, R.; Marconi, Lorenzo; Bagni, G.; Grimani, C.; Vetrano, F.; Viceré, A.; Carbone, L.; Cavalleri, A.; Dolesi, R.; Hueller, M.; Vitale, S.; Weber, William J.; Iafolla, V.; Nozzoli, S.; Santoli, Francesco; Pucacco, Giuseppe

doi:10.1088/1742-6596/32/1/027

Cited by 9 publications

(8 citation statements)

References 9 publications

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“…free from any experimenter's intervention, along the sensitive direction (the one that faces the opposite, far TM in the interferometer arm), while motion in all other degrees of freedom (DOFs) will be restrained by feedback, to keep both TM centered inside one spacecraft [7]. To address this issue, we are completing a complementary instrument, nicknamed PETER (PEndolo Traslazionale E Rotazionale, Rotational and Translational Pendulum) [8]: a double torsion pendulum where force-free motion is to be achieved simultaneously in two different DOFs, i.e. for translation of the TM and for rotation around its axis.…”

Section: Experimental Set Up and Measurementsmentioning

confidence: 99%

Torsion pendulum revisited

et al. 2013

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We present an analysis of the motion of a simple torsion pendulum and we describe how, with straightforward extensions to the usual basic dynamical model, we succeed in explaining some unexpected features we found in our data, like the modulation of the torsion mode at a higher frequency and the frequency splitting of the swinging motion. Comparison with observed values yields estimates for the misalignment angles and other parameters of the model.

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Section: Experimental Set Up and Measurementsmentioning

confidence: 99%

Torsion pendulum revisited

et al. 2013

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“…The chamber is continuously driven by the seismic noise, which disturbs the pendulum or balance, and thus limits the experimental resolution to a certain level. A simplified model, as shown in figure 1, is used to conveniently analyse the disturbances contributing to the horizontal seismic noise [8,9,12]. A balance bar and a PM are suspended by two fibres.…”

Section: Estimation Of the Seismic Noise Limitmentioning

confidence: 99%

“…For the two-stage torsion pendulum of Stanga et al [8,9], the CMRR can be deduced with a similar method in spite of the four-mass configuration, which is estimated to be 20 log |T m /H m | ω<ω L ≈ −107 dB at low frequencies. It means that the local horizontal seismic noise with an order of 10 −7 m s −2 Hz −1/2 will limit the ground-based performance measurements of the translational DOF to about 4 × 10 −13 m s −2 Hz −1/2 .…”

Section: Estimation Of the Seismic Noise Limitmentioning

confidence: 99%

“…Here the two-stage torsion pendulum is supposed to be operated in free oscillation mode. The limit by the NLNM, when the experiment is carried out at the quietest site on Earth, can be deduced with the torsion balance experimental parameters given by [8,9] as shown by the star line in figure 7. The NLNM does not set a limit for the requirements of the LISA mission.…”

Section: Estimation Of the Seismic Noise Limitmentioning

confidence: 99%

“…For example, a torsion pendulum with a single PM was constructed to investigate the residual torque noises of the PM [3][4][5], and a torsion balance with four PMs was constructed to directly measure the residual forces of one of the PMs [6,7]. As a further experiment, a two-stage torsion pendulum with two fibres and four PMs was constructed to study the cross-coupling between two orthogonal degrees of freedom (DOFs) [8,9]. A highquality fused silica fibre was employed to improve the sensitivity of the torsion pendulum in order to investigate the residual forces acting on the PM with higher resolution [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Three-Dimensional Optical Measurement with Spectroscopic Function Using Fiber Laser Supercontinuum

Ohta

Nishizawa

Ozawa

et al. 2011

Jpn. J. Appl. Phys.

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A torsion balance, which is sensitive to force or torque, has been employed to investigate the residual disturbances of high-precision inertial sensors for the LISA Pathfinder and LISA missions. These experiments are inevitably disturbed by the seismic noise. In this paper, the impact of the seismic noise is theoretically analysed, and the corresponding experimental result is consistent with theoretical estimation. Finally, the seismic noise limit for the ground-based torsion balance experiments for performance investigation of an inertial sensor for the LISA mission is discussed. The results show that the local seismic noise should be carefully considered for further experiments with higher resolution.

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Design and validation of a high-voltage levitation circuit for electrostatic accelerometers

Zhou

et al. 2013

Review of Scientific Instruments

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A simple high-voltage circuit with a voltage range of 0 to 900 V and an open-loop bandwidth of 11 kHz is realized by using an operational amplifier and a MOSFET combination. The circuit is used for the levitation of a test mass of 71 g, suspended below the top-electrodes with a gap distance of 57 μm, so that the performance of an electrostatic accelerometer can be tested on the ground. The translation noise of the accelerometer, limited by seismic noise, is about 4 × 10(-8) m/s(2)/Hz(1/2) at 0.1 Hz, while the high-voltage coupling noise is one-order of magnitude lower.

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Ground based 2DoF test for LISA and LISA PF

Cited by 9 publications

References 9 publications

Torsion pendulum revisited

Torsion pendulum revisited

Three-Dimensional Optical Measurement with Spectroscopic Function Using Fiber Laser Supercontinuum

Design and validation of a high-voltage levitation circuit for electrostatic accelerometers

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