Geodesic Acoustic Mode - Revision history

Admin at 12:04, 15 July 2014

2014-07-15T12:04:12Z

← Older revision		Revision as of 14:04, 15 July 2014
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	The Geodesic Acoustic Mode (GAM) is a plasma oscillation occurring in toroidal confinement devices with the following properties:		The Geodesic Acoustic Mode (GAM) is a plasma oscillation occurring in toroidal confinement devices with the following properties:
	<ref>N. Winsor, J.L. Johnson and J.M. Dawson, ''Geodesic Acoustic Waves in Hydromagnetic Systems'', [[doi:10.1063/1.1691835\|Phys. Fluids '''11''' (1968) 2448]]</ref>		<ref>N. Winsor, J.L. Johnson and J.M. Dawson, ''Geodesic Acoustic Waves in Hydromagnetic Systems'', [[doi:10.1063/1.1691835\|Phys. Fluids '''11''' (1968) 2448]]</ref>
	<ref>K.J. Zhao et al., ''Toroidal Symmetry of the Geodesic Acoustic Mode Zonal Flow in a Tokamak Plasma'', [[doi:10.1103/PhysRevLett.96.255004\|Phys. Rev. Lett. '''96''' (2006) 255004]]</ref>		<ref name=Zhao>K.J. Zhao et al., ''Toroidal Symmetry of the Geodesic Acoustic Mode Zonal Flow in a Tokamak Plasma'', [[doi:10.1103/PhysRevLett.96.255004\|Phys. Rev. Lett. '''96''' (2006) 255004]]</ref>
			<ref>Z. Gao, ''Collisional damping of the geodesic acoustic mode'', [[doi:10.1063/1.4794339\|Phys. Plasmas '''20''' (2013) 032501]]</ref>

	* Radially localized		* Radially localized
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	* Poloidally symmetric potential (m=0) and asymmetric density (m=1) perturbations		* Poloidally symmetric potential (m=0) and asymmetric density (m=1) perturbations

	The GAM frequency is, approximately:		The GAM frequency is, approximately:<ref name=Zhao></ref>

	:<math>f_{GAM} \sim (1+1/2q^2)\frac{\sqrt{(T_e+T_i)/M_i}}{2\pi R}</math>		:<math>f_{GAM} \sim (1+1/2q^2)\frac{\sqrt{(T_e+T_i)/M_i}}{2\pi R}</math>

Admin at 10:08, 15 July 2014

2014-07-15T10:08:22Z

← Older revision		Revision as of 12:08, 15 July 2014
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	<ref>K.J. Zhao et al., ''Toroidal Symmetry of the Geodesic Acoustic Mode Zonal Flow in a Tokamak Plasma'', [[doi:10.1103/PhysRevLett.96.255004\|Phys. Rev. Lett. '''96''' (2006) 255004]]</ref>		<ref>K.J. Zhao et al., ''Toroidal Symmetry of the Geodesic Acoustic Mode Zonal Flow in a Tokamak Plasma'', [[doi:10.1103/PhysRevLett.96.255004\|Phys. Rev. Lett. '''96''' (2006) 255004]]</ref>

	* ~~Redially~~ localized		* Radially localized
	* Axisymmetric (n=0)		* Axisymmetric (n=0)
	* Poloidally symmetric potential (m=0) and asymmetric density (m=1) perturbations		* Poloidally symmetric potential (m=0) and asymmetric density (m=1) perturbations

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The Geodesic Acoustic Mode (GAM) is a plasma oscillation occurring in toroidal confinement devices with the following properties:
<ref>N. Winsor, J.L. Johnson and J.M. Dawson, ''Geodesic Acoustic Waves in Hydromagnetic Systems'', [[doi:10.1063/1.1691835|Phys. Fluids '''11''' (1968) 2448]]</ref>
<ref>K.J. Zhao et al., ''Toroidal Symmetry of the Geodesic Acoustic Mode Zonal Flow in a Tokamak Plasma'', [[doi:10.1103/PhysRevLett.96.255004|Phys. Rev. Lett. '''96''' (2006) 255004]]</ref>

* Redially localized
* Axisymmetric (n=0)
* Poloidally symmetric potential (m=0) and asymmetric density (m=1) perturbations

The GAM frequency is, approximately:

:<math>f_{GAM} \sim (1+1/2q^2)\frac{\sqrt{(T_e+T_i)/M_i}}{2\pi R}</math>

== References ==
<references />