Design, Manufacturing, and Commissioning of BIRCAM (Bootes InfraRed CAMera)

Figure 9

Pressure graph of intermediate test of endurance. This graph refers to a different test respect to the previous. The first part is the pumping of the system with a turbomolecular (two stages) pump, the second part (after first 24 hours) is the cooling down phase. Intermediate bumps reflect the end of the nitrogen in the fuel tank (again night time).