Session J9 - Experimental Gravity and Gravitational Radiation.
FOCUS session, Sunday afternoon, April 29
Room 2, Renaissance Hotel
In gravitational wave detectors such as LIGO, there are many environmental signals and some interferometer signals that have directional information. We develop a method ("beam analysis") to discover such information, and apply it to seismic noise at the LIGO Hanford site. Using this method, we can find out the direction of approach, as well as the transverse or longitudinal characteristics of the seismic waves. We show the application of these results to the analysis of gravitational gradients influencing the interferometer. We also propose the use of this method in some of the interferometric signals.
This work was supported by The Pennsylvania State University and by the National Science Foundation awards PHY-9973783 and PHY-9870032.