Halverson–Ptasznik Drift in Cold Boundary Plasmas
The Gist
The authors report a slow sideways motion they call the Halverson–Ptasznik drift, seen only in cold boundary plasmas held below the Oduya threshold.
The simple version
Imagine a very cold, very thin gas of charged particles sitting at the edge of a container. Normally it just sits there. These researchers found that when the gas gets cold enough, it starts sliding sideways all by itself, a little like a sleeping person drifting to one side of the bed. They named this sliding the Halverson–Ptasznik drift, and they found it only ever starts once the gas drops below what they call the Oduya threshold. Nobody had noticed it before because you need to watch for several hours to see it at all.
Technical Summary
We characterise an anomalous transverse transport mode, the Halverson–Ptasznik drift, in magnetised cold boundary plasmas below the Oduya threshold. Drift velocity scales sub-linearly with the ratio of ion gyroradius to sheath width, and vanishes above the threshold. Dataset reference: GSC-EN-7F3A91D4.