We were suspicious of a vacuum leak in X-beam manifold (see previous aLOG), but it may be a failing ion pump (half of the pump). Attached is a year scan of the two signal currents. We swapped out the old power supply with the new style. Pump current is relatively high ~700 uA vs. 90 uA on IP5.

We will continue to leak check this evening while we're set up for it. So far we've sprayed GV7, the Balzer RGA with long lever arm, and a couple ports and flanges. No leaks detected.