daniel.hoak@LIGO.ORG - posted 01:25, Friday 27 March 2015 - last comment - 08:46, Friday 27 March 2015(17502)
some new violin data
Evan & Sheila, Dan & Lisa
Tonight some new failure modes of the violin damping manifested themselves, and we found new ways to damp them.
On ITMY, the following modes and settings were identified:
| Frequency (Hz) | Filter (ITMY_L2_DAMP) | Settings (phase, gain) |
| 503.007 | MODE3 | +60deg, +200 |
| 503.119 | MODE1 | -60deg, -300 |
| 504.875 | MODE4 | 0deg, +300 |
Note that in the earlier catalog the 504.875 line was mis-identified as an ETMX mode, and the 503.119 line was not paired with an optic.
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