Frequency classification of plasmas
- Frequency classification of plasmas
Electrical discharges applied in a plasma source for the generation of plasmas can be classified by the frequency of the exciting field. A rough classification is:
*Direct current discharge (DC)
*Pulsed DC discharge (kHz)
*Radio-frequency discharge (MHz) - sustained by two electron heating mechanisms: ohmic heating and stochastic heating
*Microwave discharge (GHz)
*Laser plasma (PHz)
The quality of the coupling of an exciting field of given frequency to a
charged particle depends on the position and shape of the plasma resonance.It critically determines the character of the electrical discharge. If themore massive ions cannot follow the oscillating electromagnetic field, the exciting frequency is called "high" (HF). In this case, the main fraction of the power is transferred to the electrons.
ee also
* Plasma source
* Gas discharge
Wikimedia Foundation.
2010.
Look at other dictionaries:
Plasma source — Plasma sources generate plasmas. Excitation of a plasma requires partial ionization of neutral atoms and/or molecules of a medium. There are several ways to cause ionization:collisions of energetic particles, strong electric fields acting on bond … Wikipedia
Anisothermal plasma — An Anisothermal plasma is a plasma which thermal state can be approximated by more than one temperature for the different degrees of freedom of the plasma. The degrees of freedom refer to translation (kinetic energy), rotation, vibration of each… … Wikipedia
Coupling (physics) — Coupling in science Classical coupling Rotational–vibrational coupling Quantum coupling Quantum mechanical coupling Rovibrational coupling Vibronic coupling Rovibronic coupling Angular momentum coupling … Wikipedia
Gas-discharge lamp — See also: Gas filled tube Germicidal lamps are simple low pressure mercury vapor discharges in a fused quartz envelope. Gas discharge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an … Wikipedia
Double layer (plasma) — This article is about the structure in plasma physics. For other uses, see Double layer. Saturnian aurora whose reddish colour is characteristic of ionized hydrogen plasma.[1] Powered by the Saturnian equivalent of (filamentary) Birkeland… … Wikipedia
Madison Symmetric Torus — Infobox Magnetic Fusion Device name = Madison Symmetric Torus dev type=Reversed field pinch loc=Madison, Wisconsin, USA rad maj = 1.50 m rad min = 52 cm aspect = 2.88|The Madison Symmetric Torus (MST) is a reversed field pinch (RFP) physics… … Wikipedia
spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… … Universalium
Inductively coupled plasma mass spectrometry — ICP MS Instrument Acronym ICP MS Classification Mass spectrometry Analytes atomic and polyatomic species in plasma, with exceptions; usually inte … Wikipedia
Energetic neutral atom — ENAs redirects here. For other uses, see Enas (disambiguation). Neutral Atom Imaging redirects here. For other uses, see Atom (disambiguation). ENA images of the fluctuation of Earth s ring current during July 15–16, 2000 geomagnetic storm made… … Wikipedia
Magnetosphere — A magnetosphere is formed when a stream of charged particles, such as the solar wind, interacts with and is deflected by the intrinsic magnetic field of a planet or similar body. Earth is surrounded by a magnetosphere, as are the other planets… … Wikipedia
