Magnetic curvature: Difference between revisions
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(Created page with 'The magnetic curvature is defined by :<math>\vec \kappa = \vec b \cdot \vec \nabla \vec b</math> where :<math>\vec b = \frac{\vec B}{|B|}</math> is a unit vector along the m…') |
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(good curvature) and unstable otherwise (bad curvature). Here, ''p'' is the pressure. | (good curvature) and unstable otherwise (bad curvature). Here, ''p'' is the pressure. | ||
<ref>[http://link.aps.org/doi/10.1103/RevModPhys.76.1071 A.H. Boozer, ''Physics of magnetized plasmas'', Rev. Mod. Phys. '''76'' (2004) 1071]</ref> | <ref>[http://link.aps.org/doi/10.1103/RevModPhys.76.1071 A.H. Boozer, ''Physics of magnetized plasmas'', Rev. Mod. Phys. '''76''' (2004) 1071]</ref> | ||
== References == | == References == | ||
<references /> | <references /> | ||
Revision as of 08:50, 10 August 2009
The magnetic curvature is defined by
where
is a unit vector along the magnetic field.
A plasma is stable against curvature-driven instabilities (e.g., ballooning modes) when
(good curvature) and unstable otherwise (bad curvature). Here, p is the pressure. [1]