Reports until 22:26, Monday 09 June 2025
H1 SUS
corey.gray@LIGO.ORG - posted 22:26, Monday 09 June 2025 (84913)
ITMy Mode 05 Changed Due To Mode Ringing Up During First Post-HAM1-Vent Lock

Elenna C., Corey G., Oli P.

With this being the first lock at NLN post the HAM1 vent, and since we had a rung up fundamental violin, decided to address for overnight operation.  It looked liked like it was our infamous ITMy MODE5/6. 

Before Oli left, they mentioned that if IY M5/6 rings up it might be worth it to try 2W settings if it rings up. 

Sure enough, it was slowing ringing up and with Elenna also assisting, we decided to change the settings.  Here they are:

NEW:

ITMy MODE5 :  FM6 + FM7 + FM10, gain = 0.01

OLD:

ITMy MODE5 :  FM6 + FM8 + FM10, gain = 0.01

The 3rd image shows when the change was made marked with the cursor and how the mode begins turning around about 10min  later.  Saved this new change in lscparams and hit LOAD on the VIOLIN DAMPING STATES and ISC LOCK notes.

Images attached to this report