The Debye sheath (also electrostatic sheath) is a layer in a plasma which has a greater density of positive ions, and hence an overall excess positive charge, that balances an opposite negative charge on the surface of a material with which it is in contact. The thickness of such a layer is several Debye lengths thick, a value whose size depends on various characteristics of plasma (e.g. temperature, density, etc.).
A Debye sheath arises in a plasma because the electrons usually have a temperature on the order of magnitude or greater than that of the ions and are much lighter. Consequently, they are faster than the ions by at least a factor of . At the interface to a material surface, therefore, the electrons will fly out of the plasma, charging the surface negative relative to the bulk plasma. Due to Debye shielding, the scale length of the transition region will be the Debye length . As the potential increases, more and more electrons are reflected by the sheath potential. An equilibrium is finally reached when the potential difference is a few times the electron temperature.
The Debye sheath is the transition from a plasma to a solid surface. Similar physics is involved between two plasma regions that have different characteristics; the transition between these regions is known as a double layer, and features one positive, and one negative layer.
The Debyesheath (also electrostatic sheath) is a layer in a plasma which has a greater density of positive ions, and hence an overall excess positive...
characteristic of the Debyesheath, that is, the current density flowing to a surface in a plasma as a function of the voltage drop across the sheath. The analysis...
such as rifles and shotguns. The outer covering of an electrical cable Debyesheath, a layer of a plasma in physics Heliosheath, the region of the heliosphere...
In plasmas and electrolytes, the Debye length λ D {\displaystyle \lambda _{\rm {D}}} (Debye radius or Debye–Hückel screening length), is a measure of a...
electric field. Debyesheath – The non-neutral layer, several Debye lengths thick, where a plasma contacts a material surface. Debye–Hückel equation –...
Debye model Debye length Debye model Debye relaxation DebyesheathDebye shielding Debye temperature, see also Debye model Lorenz–Mie–Debye theory Rayleigh–Gans–Debye...
Vacuum arc Townsend discharge St. Elmo's fire Lightning Electric organ Debyesheath Electrical breakdown Electric discharge in gases Lichtenberg figure Space...
lies considerably below the plasma potential, due to what is termed a Debyesheath. The good electrical conductivity of plasmas makes their electric fields...
properties of the Debyesheath, a near-surface layer in plasmas similar to the double layer in other fluids. For example, if the Debyesheath length on a slotted...
Aharonov–Bohm effect of electromagnetic potential on a particle Bohm sheath criterion for a Debyesheath plasma layer Bohm diffusion of plasma in a magnetic field...
draws no net current, including formation of a Debyesheath with a thickness of a few times the Debye length. If the electrons charging the dust grains...
Crookes tube Current sheet Cutoff frequency Cyclotron radiation Debye length Debyesheath Deep reactive-ion etching Degenerate matter Degree of ionization...
electron Debye length is equal to or larger than the size of the object and the plasma is not flowing. The OML regime occurs when the sheath becomes sufficiently...
Farley–Buneman instability Peter Debye Nobel Prize–winning physicist and chemist, after whom Debye shielding and Debye length are named Philo Farnsworth...
contribution because of the far reaching electrostatic forces (compare the Debye–Hückel theory of electrochemistry). Marcus' tool is the theory of dielectric...
Deborah (Bible, Judges 5:5) Debye model – Peter Joseph William DebyeDebye–Falkenhagen effect – Peter Joseph William Debye and Hans Falkenhagen Richard...
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