(Mark, Tyler, Gerardo, Kyle, Chandra, Bubba)

Ion pump 11 and chevron baffle assembly were removed from the beam tube and inspected.
The copper gasket removed from the gate valve/chevron baffle joint was visually inspected, that was a good seal.
The copper gasket removed from the chevron baffle/ion pump joint was visually inspected, also was a good seal.
Then the baffle housing was visually inspected (SN#001), right away Mark found the hole on one of the welds, see photo, Bubba, Tyler and I confirmed the spot, something to note are the stains on the metal due to the isopropanol alcohol, which was sprayed on the exterior of the chevron baffle housing and sipped towards the inside of the housing.  We sprayed alcohol trying to determine the location of the leak.

Chandra found a suitable replacement baffle housing (SN002).  The chevron baffle assembly was transfer to its new housing, and assembled per procedure. All items were re-assembled and while using a blank instead of the gate valve, the entire assembly was bench leak tested.  We did a coarse helium spray, no detection noted.  Then a bag was used such that each CFF joint was exposed but keeping the baffle's housing vacuum welds within the bagged volume.  The bag volume was purged with bottled N2 while spraying helium around each CFF joint, there was no significant response.  Then the procedure was reversed and helium was used to saturate the bagged volume, that yield no response.  No leaks detected on this assembly.

To do next, vent IP11 volume with nitrogen to get it ready for install on the beam tube.