(Travis S., Jordan V., Gerardo M.)
Late entry-
Late Wednesday we vented the annulus system for HAM4 using nitrogen. On Thursday, we removed and replaced the ion pump, a very uncomfortable location for this pump, it is surrounded by cable trays, see photos.
We have not been able to fasten the mounting bolts that hold the ion pump body in place, we have noticed that the pipes for the annulus system leading up to the mounting flange are not parallel to the ion pump flange they are |/ and they should be ||. So, we have to twist the pipe to be able get it parallel to the pump. We have a mechanical block supporting the pump as a temporary support, we'll replace it as soon as possible.
Today, I visited HAM4 ion pump and turned the controller on, it railed at first, and a few minutes later it was at nominal value, and after it reaching a bit below 2 milliamps I closed the isolation valve for the annulus system, an hour or so later the aux-cart, can turbo and hoses were removed. Ion pump pressure signal has turned around and getting lower, nice! Good job, Jordan and Travis.