So I've been all over the internet trying to find an answer and I just can't find it. I'm making an experiment, I want to send microwaves from a magnetron through a loop (like a torus but hollow inside) and I want to know what material should this loop be so that the electrons don't hit the walls (I want a continuous flow of microwaves through the loop). I think I could use copper but I don't know if its efficient enough, or maybe I need to create a magnetic field so that the electrons don't hit the walls? I'm a bit lost. Any Ideas?, did I explain myself?
