Bissell, J. J. and Ridgers, C. P. and Kingham, R. J. (2010) 'Field compressing magnetothermal instability in laser plasmas.', Physical review letters., 105 (17). p. 175001.
The mechanism for a new instability in magnetized plasmas is presented and a dispersion relation derived. Unstable behavior is shown to result purely from transport processes—feedback between the Nernst effect and the Righi-Leduc heat-flow phenomena in particular—neither hydrodynamic motion nor density gradients are required. Calculations based on a recent nanosecond laser gas-jet experiment [ D. H. Froula et al. Phys. Rev. Lett. 98 135001 (2007)] predict growth of magnetic field and temperature perturbations with typical wavelengths of order 50 μm and characteristic growth times of ∼0.1 ns. The instability yields propagating magnetothermal waves whose direction depends on the magnitude of the Hall parameter.
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|Publisher Web site:||http://dx.doi.org/10.1103/PhysRevLett.105.175001|
|Record Created:||16 Apr 2012 16:20|
|Last Modified:||02 May 2012 14:59|
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