corey.gray@LIGO.ORG - posted 16:36, Sunday 13 December 2015 - last comment - 17:11, Sunday 13 December 2015(24183)
Transition To EVE Shift Update
TITLE: 12/13 EVE Shift: 00:00-08:00UTC (16:00-00:00PDT), all times posted in UTC
STATE of H1: DOWN
Outgoing Operator: TJ
Quick Summary:
After getting hand-off from TJ, will take another look at Input Alignment (will watch x-arm power on DV & also the AS camera to look for obvious misalignment...if needed, will tweak PR2. Will also increase XARM digital gain to see if this helps as well [these were suggestions Sheila gave me over the phone]). If this does not work, I might look at Input Pointing over the last few weeks/months to see what our current state looks like compared to the past.
Conditions look decent (no winds, under 10mph), but useism is still roaring (LVEA is hovering around 1um/s).
Currently, all ISIs have their 45mHz Blend Filters ON. When we are dealing with noisy useism, Jim mentioned we should keep the 90mHz Blends on for the ETM off-axis Blends (i.e. ETMx ISI has 45mHz for X-axis & 90mHz for Y-axis, and similarly for ETMy ISI). But since we are dealing with pretty noisy conditions, Sheila thought we should run with all 45mHz on. She checked the recent locklosses from home to confirm we weren't ringing up the ISIs due to doing this---> and we weren't, so she suggested we continue to stay with all the Blends ON.
OK, onto Initial Alignment!