Magnetic diffusivity
The magnetic diffusivity is a parameter in plasma physics which appears in the magnetic Reynolds number. It has SI units of m²/s and is defined as:[1]
- ,
where is the permeability of free space and is the electrical conductivity of the material in question. In case of a plasma, this is the conductivity due to Coulomb or neutral collisions: , where
- is the electron density.
- is the electron charge.
- is the electron mass.
- is the collision frequency.
See also
References
- ↑ W. Baumjohann and R. A. Treumann, Basic Space Plasma Physics, Imperial College Press, 1997.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.