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Reports until 18:00, Monday 26 June 2023
H1 ISC (SUS)
austin.jennings@LIGO.ORG - posted 18:00, Monday 26 June 2023 - last comment - 18:42, Monday 26 June 2023(70838)
Violin Overview Error

When relocking (currently at MAX POWER), Elenna and I noticed a possible error on the violin mode overview. The overview itself was reading that some of the 500 Hz monitor filters, particularly ITMY 5/6 and ETMX 18/19 are showing abhorrently high values. However, DARM is showing that the peaks, while not great, are nowhere near as bad as the violin overview is saying it is - both screenshots attached. In addition, the DCPD overview is actually converging and were are getting no verbal saturations anywhere. This is the first we're seeing of this, so we're not really sure what to make of it (Elenna theorized that maybe it could have been a faulty impulse response). Will keep monitoring as we continue up, curious what will happen with the VIOLIN_DAMPING guardian once ISC LOCK gets to DAMP VIOLINS FULL POWER.

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austin.jennings@LIGO.ORG - 18:42, Monday 26 June 2023 (70840)

Update: The violin damping turned on nominally for all modes. Now, most of the monitor filters look ok, but the smaller binned ITMY 5/6 are still extremely high (~17).

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