aLIGO LHO Logbook

H2 SUS

betsy.weaver@LIGO.ORG - posted 09:12, Wednesday 23 May 2012 - last comment - 11:26, Wednesday 23 May 2012(2927)

ETMy damped

Unexpectedly, I found the ETMy undamped this morning and the loop switches in an inconsistent state of on or off. I restored the switches to their appropriate on or off and enabled the damping on R0 and M0. THe suspesnion should remained damped at all times. It might, however trigger off a few times today as alignment activities commence. I'll (or designee) try to keep it damped throughout the day.

Comments related to this report

jeffrey.garcia@LIGO.ORG - 11:26, Wednesday 23 May 2012 (2928)

Link

The switch values on the MEDM were consistent. They explicitly display the state of each switch and watchdog state.  ETMY damping loops were not closed last night (05/22/12).  The damping loops were left open for AIS measurements yesterday afternoon. The ETMY SUS damping loops have been left open for several nights since the in-chamber installation.  The damping loops will be left closed overnight henceforth.