Seismic isolation for advanced LIGO

R. Abbott, California Institute of Technology
R. Adhikari, LIGO, Massachusetts Institute of Technology
G. Allen, Ginzton Laboratory
S. Cowley, Ginzton Laboratory
E. Daw, Louisiana State University
D. DeBra, Stanford University
J. Giaime, Louisiana State University
G. Hammond, University of Colorado Boulder
M. Hammond, LIGO Livingston
C. Hardham, Ginzton Laboratory
J. How, Ginzton Laboratory
W. Hua, Ginzton Laboratory
W. Johnson, Louisiana State University
B. Lantz, Ginzton Laboratory
K. Mason, LIGO, Massachusetts Institute of Technology
R. Mittleman, LIGO, Massachusetts Institute of Technology
J. Nichol, Ginzton Laboratory
S. Richman, LIGO, Massachusetts Institute of Technology
J. Rollins, LIGO, Massachusetts Institute of Technology
D. Shoemaker, LIGO, Massachusetts Institute of Technology
G. Stapfer, LIGO Livingston
R. Stebbins, University of Colorado Boulder

Abstract

The baseline design concept for a seismic isolation component of the proposed 'Advanced LIGO' detector upgrade has been developed with proof-of-principle experiments and computer models. It consists of a two-stage in-vacuum active isolation platform that is supported by an external hydraulic actuation stage. Construction is underway for prototype testing of a full-scale preliminary design.