Achieving Geodetic Motion for LISA Test Masses: Ground Testing Results

Research output: Contribution to journalArticle

Authors

  • A Cavalleri
  • R Dolesi
  • CD Hoyle
  • M Hueller
  • S Vitale
  • WJ Weber

Colleges, School and Institutes

Abstract

The low-frequency resolution of space-based gravitational wave observatories such as LISA (Laser Interferometry Space Antenna) hinges on the orbital purity of a free-falling reference test mass inside a satellite shield. We present here a torsion pendulum study of the forces that will disturb an orbiting test mass inside a LISA capacitive position sensor. The pendulum, with a measured torque noise floor below 10 fN m/square root of Hz from 0.6 to 10 mHz, has allowed placement of an upper limit on sensor force noise contributions, measurement of the sensor electrostatic stiffness at the 5% level, and detection and compensation of stray dc electrostatic biases at the millivolt level.

Details

Original languageEnglish
Article number151101
JournalPhysical Review Letters
Volume91
Issue number15
Early online date1 Oct 2003
Publication statusPublished - 1 Oct 2003