Yesterday evening, we closed Cavity Box and placed it under the primary pump for ~2 hours. then for lack of time we switched it off (did not want to leave it overnight as it could heat up).

After closing the valve connecting the pump with the cavity and switching the pump off, a slight increase in pressure happened and then a very small increase over time (can be seen in plot attached )

today we turned it on again until we reached a stable value , took ~ 3 hours

min value reached with pump on = 6.4*10^-2 mbar

value after switching pump off = 6.5*10^-2 mbar

at the end of the day ~ 7 hours after stopping, the pump value = 1.8*10^-1 mbar