Objective: Coating the inner surface of a tantalum tube to make a destructive test and use a reference for the tantalum boats coatings

Results: The tube was coated

Sunday, March 28, 2021, 11:23

No water leak

IGP1 = 2.3e-7 torr

Sunday, March 28, 2021, 16:10

The wire was heated in the same manner as the last three runs

From 0A to 7A the autoramp was set to 0.5A/min

At 8A the wire started the glow dimmly 

Above 8A, the wire was heated manually at 0.5A until 16A where the step was changed to 1A, 

the temperature was measured with the filament pyrometer every 2 A starting at 10A

At 42 A the step was changed to 0.6A until 42.6A, 4.38V (2020 °C), the wire was kept at that temperature for 90 min

After that time, the current was ramped down at 0.5A/min until ~20A when the current rampping was changed too 1A/min