The magnetic diffusivity is a parameter in plasma physics. It appears in the Magnetic Reynolds number. The magnetic diffusivity is defined as:
- .
- is the permeability of free space.
- 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.
Famous quotes containing the word magnetic:
“We are in great haste to construct a magnetic telegraph from Maine to Texas; but Maine and Texas, it may be, have nothing important to communicate.”
—Henry David Thoreau (1817–1862)