The Bohm criterion and sheath 1 formation

  title={The Bohm criterion and sheath 1 formation},
    In the limit of a small Debye length (,ID+ 0) the analysis of the plasma boundary layer leads to a two-scale problem of a collision free sheath and of a quasi-neutral presheath. Bohm's criterion expresses a necessary condition for the formation of a stationary sheath in front of a negative absorbing wall. The basic features of the plasma-sheath transition and their relation to the Bohm criterion are discussed and illustrated from a simple cold-ion fluid model. A rigorous kinetic analysis of the… CONTINUE READING
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    • N RabinowitzI
    • 1959

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