Displaying report 1-1 of 1.
Reports until 03:44, Saturday 13 June 2015
LHO General
thomas.shaffer@LIGO.ORG - posted 03:44, Saturday 13 June 2015 (19114)
Ops Report

I took over for Travis as the interferometer was locking DRMI, shortly after I had to damp ETMY and ITMX bounce and roll modes. It then made it to BOUNCE_VIOLIN_MODE_DAMPING before it broke. After recovery, it got stuck on LOCK_DRMI_1F for a long time, much longer than usual (25min is where I would give up) . I have heard this could be from a bad alignment so I did a quick initial alignment with no issues and then made it a few times to REFL_TRANS/RESONANCE before it broke lock.

Again LOCK_DRMI_1F took a long time so I did another initial alignment. This time, I struggled keeping the ALS locked. It would all seem good and then one of them would catch a flurry of large modes and then recover back to a steady power above 1. When I limped through IA to SRC_ALIGN, Guardian said that it was locked and it was not. This happens some times and is normally an easy fix but I couldn't make it work well at all, it was constantly moving around. I eventually got something that was round(ish) but pretty wavey and tried to move on. Made it to LOCK_DRMI_1F and it asked that I adjust it by hand, which is also not working.

That's the rundown of my shift so far, let's hope it improves.

Displaying report 1-1 of 1.