sci.physics.electromag

> Engineers from electron beam area should know that.
> S*

In my view, there is no way that they would not know this.
But they rather use the term as involving some material
support, for applied applications. Don't you think?

But I still do not know if an electron beam in vaccum is like electrons in a
superconductor (no grad) or like in a wire (with grad q). Maybe after
Easter.
S*