Black body radiation vs electric discharge in a gas

[vanhees71]

As I said, that's the Hall effect (in the limit where the conductivity of the plasma is very large, i.e., $\sigma \rightarrow \infty$, you have $v=E/B$, because $\vec{E}+\vec{v} \times \vec{B} \stackrel{!}{=}0$ in this limit.