Fig. 2
Ratio of the sheath extent to the ion-neutral mean free path δni = dsh/λmfp,n as a function of atmospheric gas pressure pgas for the same model atmosphere as in Fig. 1. δni is plotted for degrees of ionization fe = 10-7, 10-4 and 10-1 and electron temperatures Te = Tgas (
K)) and Te = 100 eV (≈ 106 K), indicating the extremities of δni in parameter space.
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