Kiwamu and Steve have started venting the 40m vacuum envelope.
centered oplevs at resonating cavities,
ITM references were set by green pointer from the ends by Koji,
closed PSL shutter and placed manual block into beam path,
checked jamnuts in locked positions on bellows,
turned HV off at PZT-Jena "steering mirror" power supply and OMC HV ps
checked particle counts,
switched oplev servos off,
set up N2 cylinder to start vent from 1e-6 Torr to 25 Torr,
have ~ 6 cylinders of instrument grade compressed air to bring envelope from 25 Torr to 760 Torr
All three cranes were wiped off today.
Kiwamu has completed the vent.