Improved Torsion Pendulum for Ground Testing of LISA Displacement   Sensors
  We discuss a new torsion pendulum design for ground testing of prototype LISA (Laser Interferometer Space Antenna) displacement sensors. This new design is directly sensitive to net forces and therefore provides a more representative test of the noisy forces and parasitic stiffnesses acting on the test mass as compared to previous ground-based experiments. We also discuss a specific application to the measurement of thermal gradient effects. 
L. Carbone, A. Cavalleri, R. Dolesi, C.D. Hoyle, M. Hueller, S.   Vitale, and W.J. Weber