Various mechanisms contributing to two-dimensional motion. 1: bulk motion, 2: ambipolar free diffusion, 3: Coulomb repulsion, 4: Child–Langmuir flux, and 5: bounded diffusion.
Schematic of signal detection setup for parallel-plate electrode system. All resistors are not shown.
Cut view of a Faraday cup assembled on a standard BNC connector.
Temporal evolution of the photoplasma as recorded by Faraday cups in the vertical direction. Initial density and applied potential is .
Distribution of photoions on Faraday cups in the vertical direction.
PIC simulated temporal dependence of uncompensated ions responsible for Coulomb repulsion. See text for labels.
Photoions collected on cathode and anode sides by Faraday cups.
Sheath thickness in front of the Faraday cup F2, when different potentials are applied on the anode.
Photoion signal on the top plate in the absence of any electric field. Density is .
Typical parameters of the photoplasma.
Percentage distribution of photoions on different locations as a function of plasma density when is applied. The values have an error of . The values in parentheses are that of 2D-PIC simulation.
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