Brian H wrote:
Current causes heat; the only link in a circuit between the cathodes and anode is the plasma. It is still not clear to me that that circuit “closes”, resulting in current through the anode.
That’s how a DPF works! The current starts to flow when the plasma arcs across the base between the cathodes & anode. This radially inward current sheath of plasma creates a magnetic field around the cylindrical axis. The cross product of the current and field causes a force along the axis, sweeping the sheath of plasma down to the end where it filaments & and goes kink-unstable forming the focus.
Its all about the current and how we get that up to the 3MA or so needed to put enough energy into the magnetic field at the focus.
