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How to Start a Magnetic Fusion Burn?
In practice, what is that candle? In magnetic fusion, actually you're right. If you use a different type of fusion concept, we would be using lasers. But for magnetic confinement fusion, the way you start it up is you start out with having a good vacuum. You need the density of your plasma needs to be many orders of magnitude below the density of air. And then you have to add energy to the system and the energy is added. The easiest one is actually adding microwaves.