Physics:Quantum Plasma instabilities and turbulence - Revision history

Maintenance script: Normalize quantum page header order

2026-05-22T11:34:13Z

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	{{Short description\|Stability of plasma under perturbations in magnetic confinement and astrophysical systems}}~~Book I~~		{{Short description\|Stability of plasma under perturbations in magnetic confinement and astrophysical systems}}

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Maintenance script: Improve Book I intro quality

2026-05-20T09:05:49Z

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	'''Plasma ~~stability~~''' describes the response of a ~~[[Physics:Quantum matter/plasma\|~~plasma]] in equilibrium to small perturbations. It determines whether disturbances grow, oscillate, or are damped out, and is a central concept in ~~[[Physics:Quantum Magnetic confinement fusion\|~~magnetic confinement fusion]] and astrophysical plasmas.<ref name="weiland">{{cite journal \|last=Weiland \|first=J. \|last2=Zagorodny \|first2=A. \|title=Drift wave theory for transport in tokamaks \|journal=Reviews of Modern Plasma Physics \|volume=3 \|issue=1 \|pages=8 \|year=2019 \|doi=10.1007/s41614-019-0029-x}}</ref>		'''Plasma instabilities and turbulence''' plasma stability describes the response of a plasma in equilibrium to small perturbations. It determines whether disturbances grow, oscillate, or are damped out, and is a central concept in magnetic confinement fusion and astrophysical plasmas. In many cases, plasmas can be modeled as conducting fluids using magnetohydrodynamics. Stability within this framework sets operational limits for fusion devices such as tokamaks, including the maximum achievable plasma beta. At smaller scales, kinetic effects become important. Instabilities such as drift-wave turbulence arise from wave–particle interactions and finite Larmor radius effects, leading to enhanced transport of energy and particles across magnetic field lines. The kink instability is a current-driven magnetohydrodynamic instability in which a plasma column bends and displaces due to magnetic forces.

	In many cases, plasmas can be modeled as conducting fluids using ~~[[Physics:Quantum Magnetohydrodynamics\|~~magnetohydrodynamics]]. Stability within this framework sets operational limits for fusion devices such as ~~[[Physics:Quantum Tokamak\|~~tokamaks]], including the maximum achievable plasma beta.~~<ref name="freidberg">{{cite book \|last=Freidberg \|first=J. P. \|title=Plasma Physics and Fusion Energy \|publisher=Cambridge University Press \|year=2007 \|isbn=978-0-521-73317-5}}</ref>~~

	At smaller scales, kinetic effects become important. Instabilities such as drift-wave turbulence arise from wave–particle interactions and finite Larmor radius effects, leading to enhanced ~~[[Physics:Quantum Transport theory\|~~transport]] of energy and particles across magnetic field lines.~~<ref name="freidberg"/>~~

	~~<div style="float:right; border:1px solid #ccc; padding:4px; background:#ffffe6; margin:0 0 1em 1em; width:450px;">~~
	~~<div style="font~~-~~size:90%;">Stable, neutral,~~ and ~~unstable equilibrium behavior~~.~~</div>~~
	~~</div>~~
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	==== Physical mechanism ====		==== Physical mechanism ====
	The ~~[[Physics:Quantum Drift physics\|~~drift-wave instability]] arises from density and temperature gradients in a magnetized plasma. It is driven by the drift motion of charged particles in crossed electric and magnetic fields.		The drift-wave instability arises from density and temperature gradients in a magnetized plasma. It is driven by the drift motion of charged particles in crossed electric and magnetic fields.

	==== Mathematical description ====		==== Mathematical description ====

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	{{Author\|Harold Foppele}}		{{Author\|Harold Foppele}}

	{{Sourceattribution\|Quantum Plasma instabilities and turbulence\|1}}		{{Sourceattribution\|Physics:Quantum Plasma instabilities and turbulence\|1}}

Harold: Clean Quantum header BOM and legacy backlink

2026-05-17T22:04:58Z

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Harold: Restore Quantum article header template

2026-05-17T21:51:28Z

Restore Quantum article header template

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	{{Short description\|Stability of plasma under perturbations in magnetic confinement and astrophysical systems}}		{{Short description\|Stability of plasma under perturbations in magnetic confinement and astrophysical systems}}

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	* '''Marginally stable''': neutral evolution		* '''Marginally stable''': neutral evolution

	= Plasma instabilities =		== Plasma instabilities ==

	=== Kink instability ===		=== Kink instability ===

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	{{Quantum article nav\|previous=Physics:Quantum Inertial confinement fusion\|previous label=Inertial confinement fusion\|next=Physics:Quantum Tokamak core plasma\|next label=Tokamak core plasma}}		{{Quantum article nav\|previous=Physics:Quantum Inertial confinement fusion\|previous label=Inertial confinement fusion\|next=Physics:Quantum Tokamak core plasma\|next label=Tokamak core plasma}}