RGA scans were collected for the corner volume using the new PrismaPro RGA. This RGA tree had been rebuilt and baked at high temp for 2+ weeks. Scan info below, raw data files will be posted to the DCC at T2600329.

RGA Model: Pfeiffer Prisma Pro

EM Voltage: 1200V

Dwell Time: 1s, 0-100 AMU, 10 pts/AMU

Valve States: GV5 & GV7 closed, FC2 & FC4 closed (Relay Tube removed & FCB-1 section common with corner)

Pumping: 3x 2000 l/s Turbo pumps, 1x 500 l/s turbopump (HAM6)

RGA filament has been on since 7/22 after RGA tree bakeout

Corner Pressure (8/7/26): 3.2E-7 Torr (PT120B)

Corner Pressure (7/27/26): 5.3E-7 Torr (PT120B)

Comparison plot showing partial pressure decrease after an additional ~10 days of pumping with turbo. Corner started high vacuum pumping on July 16th 2026 (22 days of pumping with turbopumps only)