2)Vacuum Systems(20 points) The Knudson number is defined as Nx=1/L, where n is the molecular mean free path and l is a characteristic dimension of the chamber(reaction vessel a) Write the numbers I to 7 corresponding to the terms below in the appropriate column, Nx>1, NK<1 1)Molecular flow 2)Viscous flow 3)P>10mT 4)P<0.1mT 5)Atoms strike surface with a velocity that traces linearly back to the source 6) Gas diffusion regime 7) Atoms strike surface with a variety of angles of incidene NK<IName: ___________________________ 2) Vacuum Systems (20 points) The Knudson number is defined as NK = λ / L , where λ is the molecular mean free path and L is a characteristic dimension of the chamber (reaction vessel). a) Write the numbers 1 to 7 corresponding to the terms below in the appropriate column, NK > 1, NK < 1. 1) Molecular flow 2) Viscous flow 3) P > 10 mT ~ 4) P < 0.1 mT ~ 5) Atoms strike surface with a velocity that traces linearly back to the source 6) Gas diffusion regime 7) Atoms strike surface with a variety of angles of incidence. NK > 1 NK < 1 3