Negative ion-containing plasmas often appear in plasma processing such as deposition and etching, etc., and also in the upper atmosphere (D-layer) as a natural state. In these cases, an almost electron-free state is realized. Compared to the usual plasmas with electrons and positive ions where their mass ratio is far from unity, plasmas with electronegative gases have different properties and applications, as summarized below.
KeywordsProbe Characteristic Target Section Magnetic Filter Iodine Pressure Optogalvanic Effect
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