Interferometer_sensitivity_studies (General)swinkels - 9:35 Monday 10 March 2008 (20079)
Print this reportGlitchThe glitch described in a previous post shows a slow ~30 Hz damped oscillation, see fig 1. At the same time, a pre-existing resonance at 5585 Hz gets strongly excited (also visible at 9635 and 9830 Hz). Looking at the Hrec signal, the slow oscillation is gone, but there is a clear step visible, see fig 2. The slow oscillation is thus probably the step-response of the DARM loop.
Using the technique described in Thermal modes between 5600 and 5900 Hz, it should be possible to identify which mirror this is and if it is a violin or a mirror mode.
