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#REDIRECT [[Plasma (physics)]]
Generation of a [[plasma]] requires [[ionisation]] of neutral [[atom]]s and/or [[molecule]]s
of a medium. There are several ways to cause [[ionisation]]:
collisions of energetic particles, strong electric fields acting on bond
[[electron]]s, or ionising radiation. The [[kinetic energy]] for ionising collisions
may come from the heat of chemical or nuclear reactions of the medium, as in
[[flame]]s, for instance. Alternatively, already released charged particles may be
accelerated by [[electric field]]s, generated electromagnetically or by radiation fields.
If at least as many [[charge carrier]]s are created per time unit as
recombine, the [[plasma]] can be sustained.
Plasma excitation by [[electromagnetic field]]s can be classified according to
*[[Frequency classification of plasmas]]
*Excitation modes
**[[Inductively coupled plasma]]
***[[Solenoid coil]]
***[[Planar coil]]
***[[Helical resonator]]
**[[Capacitively coupled plasma]]
***[[Parallel plate recator]]
**[[Wave-heated plasma]]
***[[Electron cyclotron resonance]]
***[[Helicon discharge]]
***[[Surface-wave-sustained mode]]
***[[Resonator mode]]
*Pressure range classification
**[[Low pressure discharge]]
**[[Atmospheric pressure discharge]]
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