Abstract
Characteristics of steady state ion sheath formed in front of a negatively biased metal plate under the influence of an ion beam have been investigated in collisionless argon plasma. The plasma is produced by hot-cathode discharge in a double plasma device. An emissive probe is used for continuous measurement of the axial plasma potential profile in front of the plate. A usual ion sheath is compressed up to certain limit by an ion beam directed toward the plate with certain energy. The numerical solution of the Poisson's equation, which includes the contribution of energetic ion beam, is compared with the experimental findings.
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