Pulsed and CW Double-Drift Silicon IMPATTs

Comment on "The social costs of producing electric power from coal: A first-order calculation"

“…Equating these two forces and solving for the migration velocity yields (2) in the region when Stokes Law applies. As the particle size (a) a p proaches the size of the mean free path of the molecules in the gas stream, the Cunningham correction factor to Stokes Law must be applied to yield…”