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A device that generates a small ball of superheated, ionized gas—plasma—to initiate reactions that ordinary sparks can't handle. Plasma igniters are for when you need to light something that really doesn't want to be lit: ultra-lean fuel mixtures, exotic propellants, the souls of your enemies. The plasma ball delivers energy more efficiently than a spark, creating a larger ignition zone and more complete combustion. In aerospace, plasma igniters are used in rocket engines that need reliable reignition in space. In your garage, they're what you'd use if you were building a rocket in your garage, which you probably shouldn't be.
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