Transport Processes in a Cylinder Immersed in a Weakly Collisional, Magnetized Plasma

Plasma-immersed wall experiments were performed in a magnetized xe plasma in a cross-field penning configuration with density and electron temperature around 10\textasciicircum 12 cm-3 and 2ev [1]. A cylinder with an open end and diameter of 1.4mm was placed across field lines so that electrons were blocked from reaching a wire recessed behind the shield while Ions were unimpeded. This is the configuration of a magnetically insulated baffled probe, a diagnostic for passively measuring plasma potential [2,3]. The reduction of electron current to the wire causes it to float close to the plasma potential [3]. Electrons have been observed further behind the baffle than expected and possible mechanisms for this have been studied, including a hall effect at the entrance, exb drift inside the volume, and other collisional effects. \textsc{[1] raitses, et. Al., 34th iepc, kobe, japan (2015).} \textsc{[2] }\textsc{katsumata, contrib. Plasma phys. }\textsc{\textbf{s}}\textsc{, 73 (1996).} \textsc{[3] demidov et. Al., rev. Sci. Instrum. 81 10e129}(2010).