This morning I asked the vacuum group for help on the target chamber leak.
We got almost the whole group and they did a very thorough gross leak check of the target chamber, beam line and lower part of both spectrometers.
They found 1 leak, and used vac-seal to close it up. It was the end of the day and the one coat did make a difference but we ran out of time to explore this area further.
They have a good plan on how to proceed tomorrow and have several things they want to look at.