LIGO Document T1300534-v1
- Trying to get an L=longitudinal=x displacement of the optic (x3) by actuating in L at the top mass (x0) causes significant displacement in P=pitch as well due to L/P cross-coupling. This is especially true near the fundamental L mode at 0.434 Hz (see Mode Summary section below). We consider two approaches to mitigating this.
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