Hello everybody, I was looking for ways to amplify magnetic fields for some project, but I happened to stuble upon articles about plasma thrusters. And seeing how a magnetoplasmadynamic thruster works, I thought: either this is really easy to make or I'm missing something. Now bare with me, most of my scientific experience lies with magnetic fields and electrical engineering basically. So I may oversimplify something or say something stupid, but just know I still have some blank spots when it comes to this stuff. As far as I know, a plasma thruster works this way: 1. a gas is propelled in to a cylinder with great amounts of pressure. The cylinder is basically a conductive metal (ex. copper) that is the Anode, and there is an inner, smaller copper cylinder that acts as a Cathode. 2. The cathode and anode are connected to a high current power source. 3. when the gas enters the cylinder, it is ionized in some way. By ionizing it, we make it conductive. Lorentz' law then accelerates the ionized gas through the length of the cylinder, thus producing thrust. Is this is? Am I missing something? Because if this is all it takes, I would try and build this contraption. But there are a few questions I have. 1. What current are we looking at when powering the cathode/anode to produce any significant thrust? 10A, 100A, 10000A? 2. How can one ionize the gas that enters? For example, I know that sparks and the electricity jumping between wires is actually air being ionized, correct? So would it be possible to attach a few spark plugs around the outer cylinder where the gas enters? So we would force all the gas that comes in to go through these sparks, thus ionizing it? (this would probably mean that the gas would catch fire, correct?) I know that this is a shot in the dark, but I thought I'd ask here, since I am unable to find any real world scenarios of this, because well... most people probably don't spend their free time building plasma thrusters and other such greatness. Also, if you'd like a sketch of what I had in mind, do let me know. Thanks!