Publication details for Dr John BissellBissell, J. J., Ridgers, C. P. & Kingham, R. J. (2010). Field Compressing Magnetothermal Instability in Laser Plasmas. Physical Review Letters 105(17): 175001.
- Publication type: Journal papers: academic
- ISSN/ISBN: 0031-9007, 1079-7114
- DOI: 10.1103/PhysRevLett.105.175001
- View online: Online version
- Durham research online: DRO record
Author(s) from Durham
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.