Utility of a baffled Langmuir probe for applications to edge plasma and turbulence characterization in stellarator plasma

Baffles are obstacles that shield plasma electrons from being collected by a floating probe by virtue of a small electron gyroradius compared to a large ion gyroradius. A baffled probe floats at space potential if the baffling results in equal electron and ion saturation currents. With such a probe, potential fluctuations can be monitored locally with minimal plasma perturbation. The performance is documented in the edge of a stellarator plasma.