hugh.radkins@LIGO.ORG - posted 15:46, Tuesday 07 February 2017 - last comment - 16:07, Tuesday 07 February 2017(33978)
BRSY Beam Balance attempt puts BRS into unusable place for a few weeks.
Jim sat cross legged looking through a 1.5" viewport for close to 5 hours attempting to move a few gram bar a few microns with no tactile knowledge that he was actually touching it. Back and forth, back and forth. Jim has successfully done this before; I never have. Krishna and Michael have done so many times. Finally we decided that at least in the current position it will drift into a useable place in a few weeks. It is a little hard to predict with all the thermal activity but historically, this is where we believe we are.
We, commissioners, may decide we need to speed this along with another intervention but with the fickleness of this we can make no promises.
As such, the normal WINDY configuration in SEI_CONF won't run. Operators should use WINDY_NOBRSY or VERY_WINDY_NOBRSXY. These should be fine while the microseism is ~.5 micron RMS. If the micrsoseism comes up, I'll come up with something else.