Damping parametric instabilities in future gravitational wave detectors by means of electrostatic actuators

Kavli Affiliate: Peter Fritschel

| First 5 Authors: John Miller, Matthew Evans, Lisa Barsotti, Peter Fritschel, Myron MacInnis

| Summary:

It has been suggested that the next generation of interferometric
gravitational wave detectors may observe spontaneously excited parametric
oscillatory instabilities. We present a method of actively suppressing any such
instability through application of electrostatic forces to the interferometers’
test masses. Using numerical methods we quantify the actuation force required
to damp candidate instabilities and find that such forces are readily
achievable. Our predictions are subsequently verified experimentally using
prototype Advanced LIGO hardware, conclusively demonstrating the effectiveness
of our approach.

| Search Query: ArXiv Query: search_query=au:”Peter Fritschel”&id_list=&start=0&max_results=10

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