Preparations to open the Corner Station to the beam tubes has resumed at the request of the various interested parties and confirmed by Keita.  

I reduced the Vertex RGA's filament emission current to 1ma down from 2ma (done earlier today).  Next, I energized IP1.  Recall that its isolation valve had leaked when the Vertex was vented.  We had de-energized this ion pump as soon as we realized that it was at high pressure on the day of the Vertex vent.  Later during the early portion of the pump down, it was valved-in to the Vertex volume but left de-energized until this evening.  Attached is the pressure response data due to energizing this 2200 L/s ion pump while exposed to the Vertex+YBM+XBM volume.  Three turbos, for a combined N2 pump speed of ~6000 L/s were pumping at the time.  It doesn't come accross in the graph, but I noticed that PT120, PT170 and PT180 were in excellent agreement when the pressure was briefly around 1 x 10-6 torr.  This is interesting to us for reasons to burdensome to describe here.

After it became obvious things were behaving as expected, I valved-in the 5 other 2200 L/s ion pumps.  This was followed by valving-out the (3) turbos.  Things look normal at this point so I am going home.  Tomorrow, I'll start off by taking an RGA scan, dumping GV5 and GV7's unpumped gate annulus volumes into the adjacent annulus volumes (I haven't forgot Chandrohn, I just haven't had the chance to start the new policy) and then opening GV5 and GV7.