(Kyle R, Gerardo M)

Removed and replaced the annulus ion pump for GV20 at X-End.

We used the crane to suspend the annulus piping while the system was decoupled from the ion pump flange.  The instrument air compressor was turned on to feed the aux cart safety valve.

No issues to report during the swap.  After the swap the new flange was leak tested using helium, we sprayed very aggressively and no leak was detected, leak test was performed with a background of 8.0 x 10^-10 torr *L/sec at the leak detector.  After the system passed the leak check, the annulus ion pump system was pumped for 3 hours with an aux cart, on that time frame the pressure dropped enough for the ion pump to be able to sustain it, after the 3 hours the hanged turbo and aux cart were decoupled, system is back to nominal.

The instrument air compressor is off.

Note for vacuum team, on the ion pump magnet frame 1 of the 4 bolts is broken, an attempt to remove it with some needle nose pliers was unsuccessful.

Done under WP#8515.