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Magnetic curvature: Difference between revisions
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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> | ||
== Normal curvature == | |||
:<math>\kappa_N = \kappa \cdot \frac{\vec \nabla \psi}{|\vec \nabla \psi|}</math> | |||
Here, ψ is a [[Flux surface|flux surface]] label (such as the poloidal flux). | |||
== Geodesic curvature == | |||
:<math>\kappa_G = \kappa \cdot \left (\frac{\vec \nabla \psi}{|\vec \nabla \psi|} \times \frac{\vec B}{|\vec B|}\right )</math> | |||
== References == | == References == | ||
<references /> | <references /> | ||