Plasma instability - Revision history

Admin at 09:34, 17 September 2011

2011-09-17T09:34:17Z

← Older revision		Revision as of 11:34, 17 September 2011
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	Below is a list of some instabilities relevant to fusion plasmas (to be completed).		Below is a list of some instabilities relevant to fusion plasmas (to be completed).
	* [[Alfvén eigenmodes]]		* [[Alfvén eigenmodes]]
	* Ballooning instability		* [[Ballooning instability]]
	* Drift wave instability		* [[Drift wave instability]]
	* [[Edge Localized Modes]]		* [[Edge Localized Modes]]
	* Electron Temperature Gradient instability		* [[Electron Temperature Gradient instability]]
	* Flute instability		* Flute instability
	* Geodesic Acoustic Mode		* [[Geodesic Acoustic Mode]] (GAM)
	* Interchange instability		* [[Interchange instability]]
	* Ion Temperature Gradient instability		* [[Ion Temperature Gradient instability]]
	* Kink instability		* Kink instability
	* Sausage instability		* Sausage instability
	* Tearing mode instability, see also [[Magnetic island]]		* [[Tearing mode instability]], see also [[Magnetic island]]
	* Whistler mode		* Whistler mode

Admin at 07:51, 10 August 2011

2011-08-10T07:51:37Z

← Older revision		Revision as of 09:51, 10 August 2011
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	Below is a list of some instabilities relevant to fusion plasmas (to be completed).		Below is a list of some instabilities relevant to fusion plasmas (to be completed).
	* Alfvén ~~eigenmode~~		* [[Alfvén eigenmodes]]
	* Ballooning instability		* Ballooning instability
	* Drift wave instability		* Drift wave instability

Admin at 06:53, 10 August 2011

2011-08-10T06:53:47Z

← Older revision		Revision as of 08:53, 10 August 2011
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	Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:		Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:
	* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.		* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.
	* Mode: a (normal) mode is a (global) solution of a (linear) evolution equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be decomposed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with ~~care~~.		* Mode: a (normal) mode is a (global) solution of a (linear) evolution equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be decomposed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with caution.

	Plasma instabilities can be classified into a number of types according to their drive (or free energy source):		Plasma instabilities can be classified into a number of types according to their drive (or free energy source):

Admin at 06:53, 10 August 2011

2011-08-10T06:53:25Z

← Older revision		Revision as of 08:53, 10 August 2011
Line 1:		Line 1:
	Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:		Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:
	* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.		* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.
	* Mode: a (normal) mode is a (global) solution of a (linear) evolution equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be ~~composed~~ into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with care.		* Mode: a (normal) mode is a (global) solution of a (linear) evolution equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be decomposed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with care.

	Plasma instabilities can be classified into a number of types according to their drive (or free energy source):		Plasma instabilities can be classified into a number of types according to their drive (or free energy source):

Admin at 06:52, 10 August 2011

2011-08-10T06:52:33Z

← Older revision		Revision as of 08:52, 10 August 2011
Line 1:		Line 1:
	Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:		Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:
	* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.		* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.
	* Mode: a (normal) mode is a (global) solution of a (linear) equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be composed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with care.		* Mode: a (normal) mode is a (global) solution of a (linear) evolution equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be composed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with care.

	Plasma instabilities can be classified into a number of types according to their drive (or free energy source):		Plasma instabilities can be classified into a number of types according to their drive (or free energy source):

Admin at 06:45, 10 August 2011

2011-08-10T06:45:45Z

← Older revision		Revision as of 08:45, 10 August 2011
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	~~Below is a list of instabilities relevant to fusion~~ plasmas ~~(to be completed).~~		Instabilities in plasmas are often referred to as 'modes'. Strictly speaking, these terms correspond to different concepts:
	~~Instabilities~~ are often referred to as 'modes', ~~while noting that~~ these terms correspond to different concepts:		* Instability: the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation. If this growth rate is positive, the perturbation is unstable.
	the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation, ~~while~~ a mode is a (global) solution of a (linear) (wave) equation.		* Mode: a (normal) mode is a (global) solution of a (linear) equation. Typically, this solution is a (standing or propagating) wave. The linearity of the equation allows any solution to be composed into a sum of mutually orthogonal normal modes. If the equation is non-linear, the term 'mode' has to be used with care.

			Plasma instabilities can be classified into a number of types according to their drive (or free energy source):
			* Rayleigh-Taylor instabilities due to density gradients or boundaries, associated with non-electromagnetic forces (e.g., gravity)
			* Gradient driven instabilities, associated with thermodynamic forces due to gradients in an otherwise Maxwellian plasma
			* Kinetic instabilities, associated with deviations from Maxwellianity, i.e., the anisotropy of the velocity distribution function
			* Streaming instabilities, associated with energetic particles or electric currents interacting with the plasma, producing waves

			Below is a list of some instabilities relevant to fusion plasmas (to be completed).
	* Alfvén eigenmode		* Alfvén eigenmode
	* Ballooning instability		* Ballooning instability

Admin at 16:07, 9 August 2011

2011-08-09T16:07:36Z

← Older revision		Revision as of 18:07, 9 August 2011
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	Below is a list of instabilities relevant to fusion plasmas (to be completed).		Below is a list of instabilities relevant to fusion plasmas (to be completed).
	Instabilities are often referred to as 'modes'.		Instabilities are often referred to as 'modes', while noting that these terms correspond to different concepts:
	~~Each item should be elaborated on~~ a ~~corresponding page~~.		the existence of an instability is determined by calculating the growth rate of an infinitesimal perturbation, while a mode is a (global) solution of a (linear) (wave) equation.

	* Alfvén eigenmode		* Alfvén eigenmode
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	* Sausage instability		* Sausage instability
	* Tearing mode instability, see also [[Magnetic island]]		* Tearing mode instability, see also [[Magnetic island]]
	* Whistler ~~modes~~		* Whistler mode

	== See also ==		== See also ==

	* [[:Wikipedia:Plasma stability]]		* [[:Wikipedia:Plasma stability]]

Admin at 16:49, 8 August 2011

2011-08-08T16:49:55Z

← Older revision		Revision as of 18:49, 8 August 2011
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	Each item should be elaborated on a corresponding page.		Each item should be elaborated on a corresponding page.

	* Alfvén ~~eigenmodes~~		* Alfvén eigenmode
			* Ballooning instability
	* Drift wave instability		* Drift wave instability
	* [[Edge Localized Modes]]		* [[Edge Localized Modes]]

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2011-08-08T15:46:49Z

Created page with 'Below is a list of instabilities relevant to fusion plasmas (to be completed). Instabilities are often referred to as 'modes'. Each item should be elaborated on a corresponding p…'

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Below is a list of instabilities relevant to fusion plasmas (to be completed).
Instabilities are often referred to as 'modes'.
Each item should be elaborated on a corresponding page.

* Alfvén eigenmodes
* Drift wave instability
* [[Edge Localized Modes]]
* Electron Temperature Gradient instability
* Flute instability
* Geodesic Acoustic Mode
* Interchange instability
* Ion Temperature Gradient instability
* Kink instability
* Sausage instability
* Tearing mode instability, see also [[Magnetic island]]
* Whistler modes

== See also ==

* [[:Wikipedia:Plasma stability]]