Two weeks of OLIS Shutdown have begun. The plan is to complete refurbishing this week and pump next week, with 36Ar+6 beam ready at the end of it. IOS is vented and open. The Supernanogan cart is out, vented and open. Plasma chamber cleaning and refurbishing in situ are in progress. The IOS upstream optics DB1-3 have been removed for refurbishing on the bench.

Later... Supernanogan MRO completed and closed. Pumping underway by ~15:30. Leakup curve appended below.