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2D Particle‐In‐Cell simulations are used to predict the ion current density on the surface of a cylinder whose top is perpendicular to the magnetic field in a magnetized nonthermal plasma. This current density decreases with increasing distance to the probe top, and the rate of decrease is predicted to be a sensitive function of the ion temperature. We consider the possibility of a new kind of probe...
In this paper, we present results of Particle‐In‐Cell simulations of a simplified model of the Ball‐pen probe (BPP). The BPP is a probe designed for direct measurements of plasma potential in the scrape‐off layer (SOL) of tokamaks. The probe is based on a standard Langmuir theory, which states that when the ratio of ion and electron saturation currents flowing to the probe collector approaches zero,...
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