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| '''{{Portal|Physics}}
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| The '''resistive ballooning mode (RBM)''' is an instability occurring in magnetized [[Plasma (physics)|plasma]]s, particularly in [[magnetic confinement]] devices such as tokamaks, when the pressure gradient is opposite to the effective gravity created by a [[magnetic field]].
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| ==Linear growth rate==
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| The linear growth rate <math>\gamma</math> of the RBM instability is given as
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| :<math>\gamma^2 = -\vec{g_{eff}}\cdot\frac{\nabla p}{p}</math>
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| where <math>|\nabla p|\sim \frac{p}{L_p}</math> is the pressure gradient <math>g_{eff}=c_s|\frac{\nabla B}{B}|\sim 1/R_0</math> is the effective gravity produced by a non-homogeneous magnetic field, ''R''<sub>0</sub> is the major radius of the device, ''L''<sub>''p''</sub> is a characteristic length of the pressure gradient, and ''c''<sub>''s''</sub> is the plasma sound speed. | |
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| ==Similarity with the Rayleigh–Taylor instability==
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| The RBM instability is similar to the [[Rayleigh–Taylor instability]] (RT), with Earth gravity <math>\vec g</math> replaced by the effective gravity <math>\vec g_{eff}</math>, except that for the RT instability, <math>\vec g</math> acts on the mass density <math>\rho</math> of the fluid, whereas for the RBM instability, <math>\vec g_{eff}</math> acts on the pressure <math>p</math> of the plasma.
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| [[Category:Plasma physics]]
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| [[Category:Stability theory]]
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| [[Category:Tokamaks]]
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Latest revision as of 18:13, 20 July 2014
Hi there. Allow me begin by introducing the author, her name is Sophia. Mississippi is where his house is. My working day job is a travel agent. What I adore doing is soccer but I don't have the time recently.
My blog post - love psychic readings