Charge induced acceleration noise in the LISA gravitational reference sensor

Sumner, T. J.; Mueller, G.; Conklin, John; Wass, Peter; Hollington, D.

doi:10.1088/1361-6382/ab5f6e

Cited by 28 publications

(16 citation statements)

References 36 publications

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“…The UV power at the input of the vacuum chamber port has been measured for all measurements shown here, combined with the fiber optic transmission inside the vacuum chamber, the power reaching the sensor was P UV = 150 ± 10nW for each measurement run. The quantum yield of similar gold surfaces has been studied in [16,17,31,38]. In systems which are allowed to stabilize over long periods ( weeks-months), the quantum yield of has been found in several circumstances to approach ∼ 2 ± 0.5 × 10 −5 for a light source with a similar wavelength as used here.…”

Section: Measuring Model Parameters and Tracking Photonsmentioning

confidence: 95%

“…The work function values returned by the fit are given in Equation (17). While the work function value for the EH surfaces measured with EH and TM ports illumination are consistent at the 1σ level, the values for TM surfaces are in tension.…”

Section: Measuring Model Parameters and Tracking Photonsmentioning

confidence: 95%

“…Electrostatic forces acting on the test mass arising from stray potentials and the test mass charge contribute to the acceleration noise budget [17]. Energetic charged particles from cosmic rays and solar energetic particles can deposit charge on the TM [18,19] either by stopping directly or by creating secondaries in the spacecraft structure.…”

Section: B Charge Managementmentioning

confidence: 99%

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Numerical Modeling and Experimental Demonstration of Pulsed Charge Control for the Space Inertial Sensor used in LISA

Inchauspé,

Olatunde,

Apple

et al. 2020

Preprint

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Electrostatic charge control of isolated free-falling test masses is a key enabling technology for space-based gravitational missions. Contact-free electrostatic charge control can be achieved using photoelectron emission from metal surfaces under illumination with deep UV light. A contact-free method minimizes force disturbances that can perturb measurements or interrupt science operations. In this paper we present charge control experiments using a gravitational reference sensor geometry relevant to the Laser Interferometer Space Antenna (LISA) gravitational wave observatory in a torsion pendulum apparatus. We use a UV LED light source to control the test mass potential, taking advantage of their high bandwidth to phase-lock the light output to 100 kHz electric fields used for capacitive position sensing of the test mass. We demonstrate charge-rate and test mass potential control by adjustment of the phase of the light with respect to the electric field. We present a simple physics-based model of the discharging process which explains our experimental results in terms of the UV light distribution in the sensor, surface work functions and quantum yields. A robust fitting method is used to determine the best-fit physical parameters of the model that describe the system.

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Section: Measuring Model Parameters and Tracking Photonsmentioning

confidence: 95%

Section: Measuring Model Parameters and Tracking Photonsmentioning

confidence: 95%

Section: B Charge Managementmentioning

confidence: 99%

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Numerical Modeling and Experimental Demonstration of Pulsed Charge Control for the Space Inertial Sensor used in LISA

Inchauspé,

Olatunde,

Apple

et al. 2020

Preprint

Self Cite

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“…"In-band" additive actuation voltage noise mixes with any stray DC potential differences-from patch potentials and TM charge [27][28][29][30][31] -to cause low frequency force noise. We can describe this by a change in force from one electrode by ∆F ≈ ∂C X ∂x ∆V DC v n , where ∆V is some stable DC potential difference between electrode and TM, and v n is some electrode actuation voltage fluctuation.…”

Section: In-band Actuation Voltage Noise and Low Frequency Electrosta...mentioning

confidence: 99%

Application of LISA Gravitational Reference Sensor Hardware to Future Intersatellite Geodesy Missions

et al. 2022

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Like gravitational wave detection, inter-spacecraft geodesy is a measurement of gravitational tidal accelerations deforming a constellation of two or more orbiting reference test masses (TM). The LISA TM system requires TM in free fall with residual stray accelerations approaching the fm/s2/Hz1/2 level in the mHz band, as demonstrated in the LISA Pathfinder “Einstein’s geodesic explorer” mission. Current geodesy missions are limited by accelerometers with 100 pm/s2/Hz1/2 level, due to intrinsic design limitations, as well as the challenging low Earth orbit environment and operating conditions. A reduction in the TM acceleration noise could lead to an important improvement in the scientific return of future geodesy missions focusing on mass change, especially in a scenario with multiple pairs of geodesy satellites. We present here a preliminary assessment of how the LISA TM system, known as the “gravitational reference sensor” (GRS), could be adapted for use in future geodesy missions aiming at residual TM accelerations noise at the pm/s2/Hz1/2 level, addressing the major design issues and performance limitations. We find that such a performance is possible in a geodesy GRS that is simpler and smaller than that used for LISA, with a lighter, sub-kg TM and gaps reduced from 4 mm to less than 1 mm. Acceleration noise performance limitations will likely be closely tied to the required levels of applied actuation forces on the TM.

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“…For ESA with strictly symmetric voltage distribution and geometrical structure, the induced voltage U i is zero while in equilibrium position. Ignoring the coupling effect between electrodes with different functions, the electrostatic force on the mass in single direction can be expressed as [18,33]…”

Section: Model Of Charge Distribution and Electrostatic Force In Esamentioning

confidence: 99%

Study on the Method of Charge Accumulation Suppression of Electrostatic Suspended Accelerometer

Dai

Wang

et al. 2022

Sensors

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Electrostatic suspended accelerometers (ESAs) are widely used in high accuracy acceleration measurement. However, there exist accumulated charges on the isolated mass which damage the accuracy and the stability of ESAs. In this paper, we propose to apply actuation voltage with a combined waveform to suppress the acceleration noise due to deposited charge. A model of the electrostatic force on the mass is established and the deviation voltage is found to be the dominant source of charge noise. Based on the analysis of disturbance electrostatic force under DC and AC signals, actuation combined with DC and AC voltage is designed and the disturbance force due to charge can be suppressed through adjustment towards the duty cycle of different compositions. Simulations and experiments are carried out and the results indicate that the disturbance due to charge can be suppressed up to 40%, which validates the efficiency of the scheme.

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Charge induced acceleration noise in the LISA gravitational reference sensor

Cited by 28 publications

References 36 publications

Numerical Modeling and Experimental Demonstration of Pulsed Charge Control for the Space Inertial Sensor used in LISA

Numerical Modeling and Experimental Demonstration of Pulsed Charge Control for the Space Inertial Sensor used in LISA

Application of LISA Gravitational Reference Sensor Hardware to Future Intersatellite Geodesy Missions

Study on the Method of Charge Accumulation Suppression of Electrostatic Suspended Accelerometer

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