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Spontaneous reduction of the heat conductivity by a temperature gradient-driven instability in electron-ion plasmas
Earth, Planets and Space volume 53, pages689–693(2001)
We have shown that there exist low-frequency growing modes driven by a global temperature gradient in electron and ion plasmas, by linear perturbation analysis within the frame work of plasma kinetic theory. The driving force of the instability is the local deviation of the distribution function from the Maxwell-Boltzmann due to a global temperature gradient. Our results suggest that the realization of the global thermal equilibrium is postponed by the local instability which is induced for quicker realization of local thermal equilibrium state in plasmas. The instability provides a new possibility to create and amplify cosmic magnetic fields without the seed for a magnetic field.
Chapman, S. and T. G. Cowling, The Mathematical theory of non-uniform gases, Cambridge University Press, Cambridge, 1960.
Chen, F. F., Introduction to Plasma Physics, 1974.
Fried, B. D., Mechanism for instability of transverse plasma waves, Phys. Fuild., 2, 337, 1959.
Hattori, M. and K. Umetsu, A possible route to spontaneous reduction of the heat conductivity by a temperature gradient-driven instability in electronion plasmas, ApJ, 533, 84, 2000.
Ikebe, Y., K. Makishima, Y. Fukazawa, T. Tamura, H. Xu, T. Ohashi, and K. Matsushita, Two-phase intracluster medium in the Centaurus cluster of galaxies, ApJ, 525, 581, 1999.
Melrose, D. B., Instabilities in space and laboratory plasmas, Cambridge Univ. Press, Cambridge, 1986.
Ramani, A. and G. Laval, Heat flux reduction by electromagnetic instabilities, Phys. Fluid., 21(6), 980, 1978.
Tanaka, M. and K. Nishikawa, Physics of high temperature plasmas, Maruzen, Tokyo, 1996.
Weibel, E. S., Spontaneously growing transverse wave in a plasma due to an anisotropic velocity distribution, Phys. Rev. Lett., 2, 83, 1959.
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Hattori, M., Umetsu, K. Spontaneous reduction of the heat conductivity by a temperature gradient-driven instability in electron-ion plasmas. Earth Planet Sp 53, 689–693 (2001). https://doi.org/10.1186/BF03353290
- Boltzmann Equation
- Secular Variation
- Velocity Distribution Function
- Acoustic Oscillation
- Collision Term