Plasma in magnetic fields.
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Previously:
https://www.homemadetools.net/forum/...890#post206746
https://www.homemadetools.net/forum/...107#post187834
https://www.homemadetools.net/forum/...676#post212797
https://www.homemadetools.net/forum/...868#post213420
https://www.homemadetools.net/forum/...103#post207507
