All the CP dewar jackets need to be pumped down under 10 micron, in order to improve their insulation capacity, and so to reduce the Nitrogen consumption, which was found 10 % higher compared to last year's same period.
We've started with the CP1 dewar jacket, and will advance with the others as well. For this particular instance, we'll leave the pump there overnight, and throughout tomorrow (it can be changed in function of the results). On the 19th (last Friday) we've been pumping it for ~5 hours, and we managed to push down the pressure from 30 to 19 microns.