Reports until 03:19, Saturday 27 July 2019
H1 General (DetChar, TCS)
edmond.merilh@LIGO.ORG - posted 03:19, Saturday 27 July 2019 - last comment - 08:50, Monday 29 July 2019(50854)
H1 Out of Observing

TCS_ITMX_CO2 node and ISI_HAM3 node have notifications.

10:02 it seems that the TCSX Laser became unlocked. I didn't see any "red" indications of this. Only the SDF diffs (which) I didin't completely understand. I accepted the diffs and this didn't clear the ready bit. By comparison the X looked ok to the Y. THen I opened the TCS_ITMX_CO2 node and saw that it was trying to re-lock. It was successfull and the diffs showed on the SDF so I accepted them (in effect reverting back to the good state, I suppose.

10:14 it just happened again as I'm typing. ugh. .....and it re-locked

10:16 Back to Observing. Hopefully, this is the last of this.

Comments related to this report
edmond.merilh@LIGO.ORG - 03:22, Saturday 27 July 2019 (50855)SEI
Link

Here is the notification from the ISI_HAM3 node (image)

Images attached to this comment
thomas.shaffer@LIGO.ORG - 08:50, Monday 29 July 2019 (50885)
Link

This is the first time that TCSX has lost lock while the IFO was in low noise for O3. We have been having other issues with TCSY.