We have investigated behaviors of positively-charged fine particles in a cross-sheath between magnetized double plasmas with different potentials separated vertically by the horizontal magnetic field. In the sheath the charges on the particles become positive, because ion current flowing from a lower high-potential plasma surpasses electron current coming across the magnetic filed from an upper...

Related Articles Influence of excited state spatial distributions on plasma diagnostics: Atmospheric pressure laser-induced He-H2 plasma J. Appl. Phys. 112, 083302 (2012) Characterizing the energy distribution of laser-generated relativistic electrons in cone-wire targets Phys. Plasmas 19, 103108 (2012) Verification of the physical mechanism of THz generation by dual-color ultrashort laser puls...

A common approach to the study of rf sheaths is to separate the description of the sheaths from that of the bulk plasma. In order to solve the resulting set of equations, an appropriate boundary condition for the sheath model has to be specified at the sheath-plasma boundary. In the existing sheath models, this boundary condition is assumed to be stationary. In present paper, we investigate the...

Antibodies to rabbit spermatozoa isolated from immunized virgin female rabbits were conjugated to hemocyanin and have been used to determine the pattern of antigenic sites over the surface of rabbit spermatozoa under a variety of conditions. When the spermatozoa are incubated with antibody at 0 degrees C, labeling is almost entirely restricted to the postacrosomal sheath. Incubation at room tem...

A plasma-loaded sheath helix supports lower hybrid modes that extend to the outside vacuum region. The phase velocity of the mode is significantly retarded by the presence of the sheath helix, making it liable to excitation by a low-energy electron beam. The extent of the mode outside the plasma is also reduced by the helix. An analysis of lower hybrid mode excitation by a beam propagating in t...

This study investigates the axisymmetric plasma flow field near a fixed-potential surface, representing the conditions near a Faraday cup. A hybrid computational code simulates electrons with a fluid model using the Boltzmann relation, and heavy particles with a Particle In Cell method. The planar Bohm sheath solution is recovered accurately for plasma conditions ni = 1.1×10 m, Ti = 300 K, Te =...

A new simple method to measure the spatial distribution of the electric field in the plasma sheath is proposed. The method is based on the experimental investigation of vertical oscillations of a single particle in the sheath of a low-pressure radio-frequency discharge. It is shown that the oscillations become strongly nonlinear as the amplitude increases. The theory of anharmonic oscillations ...

The plasma force on grains of specified charge and height in a collisional DC plasma sheath are calculated using the multidimensional particle in cell code COPTIC. The background ion velocity distribution functions for the unperturbed sheath vary substantially with collisionality. The grain force is found to agree quite well with a combination of background electric field force plus ion drag fo...