Reports until 10:41, Monday 01 April 2019
H1 SUS
thomas.shaffer@LIGO.ORG - posted 10:41, Monday 01 April 2019 (48118)
Briefly Out of Observing from Violin Mode GRD

The violin mode Guardian briefly knocked us out of Observing to damp ITMX mode 11. To stop this from happening anymore, I went through the SDF for all the quads and unmonitored all of the gains that the guardian changes, as well as all the TRAMPS. Hopefully I didn't miss any.

Another thing that I found odd, is that when this brought us out of observing, it was because the mode was growing and got turned off. But then 13 seconds later it turned the gain bak on with "gain to the max". Seems odd, but perhaps it's doing what it should.


2019-04-01_16:55:14.636336Z VIOLIN_DAMPING [DAMPING_ON_DC.run] USERMSG 0: ITMX mode 11 is growing!! turning off gain
2019-04-01_16:55:14.638116Z VIOLIN_DAMPING [DAMPING_ON_DC.run] ezca: H1:SUS-ITMX_L2_DAMP_MODE11_GAIN => 0
2019-04-01_16:55:27.257471Z VIOLIN_DAMPING [DAMPING_ON_DC.run] setting MODE11 on ITMX gain to the max
2019-04-01_16:55:27.259129Z VIOLIN_DAMPING [DAMPING_ON_DC.run] ezca: H1:SUS-ITMX_L2_DAMP_MODE11_GAIN => 600