Summary of today activities:

- He leak test of WE newly added ZnSe viewport: passed, LR<1E-8 mbar.l/s
- He leak test of WI newly added ZnSe viewports: passed for both viewports, LR<1E-8 mbar.l/s
- NE tower has been equipped with the viewport VP_ZnSe#5
- the evacuation of NE tower is in progress (but TCM1601 went KO, it is to be replaced)
- NI tower venting has been started