Can you rotate or control a pulsed plasma using a magnetic field? And what happens if the pulse is only about 100 nanoseconds long?

In this video, I respond to a viewer question about gliding arcs, pulsed plasmas, magnetic fields, and whether it is possible to control ignition, reignition, and arc motion on very short timescales.

I walk through the basic sequence of atmospheric-pressure discharge formation: electron avalanche, streamer, spark, and arc. Then I explain different ways to influence or steer plasma, including gas flow, magnetic fields, electrode geometry, pressure gradients, laser or electron-beam pre-ionization, and even acoustic pressure waves.

The key point: at 100 nanoseconds, you may not really have a fully developed arc yet. You are likely still in the avalanche, streamer, or early spark regime, depending on pressure, gas composition, electrode spacing, and power supply behavior.

This gets into the tricky but fascinating world of fast pulsed plasmas, where the discharge does not always behave like a visible thermal arc.

#plasma #arcplasma #glidingarc #pulsedplasma #physics #engineering #science