Mark D., Tyler G., Chris S., Gerardo M., Kyle R.
Gerardo M. and I leak tested the new CFF joints after the installation was done this morning and measured a 1.7 x 10-8 torr*L/sec helium leak at the Gate valve to chevron baffle spool joint -> This joint is visibly "gappy" for a portion of its periphery even after subsequent re-torques -> looks like the gasket may have been out-of-round -> I shut down the pumps and leak detector but left everything in place. We will redo this joint during the Aug. 28th maintenance period.
NOTE - We will need to soft-close GV5 and GV7 and, thus, interrupt the IFO during the Aug. 28th maintenance day. We will also need the South Crane for a few hours and will need to coordinate with the people who will be on site doing the annual crane inspection during that day.
Leak resolved in aLOG 43718
Did anyone track the serial number of the nipple or the baffle?
Yes, ASSY-D1600431-003.