170 | | In cgs units, the real magnetic diffusivity can be written as:[[BR]] |
171 | | |
172 | | [[latex($\eta = c^2/4\pi \sigma$)]] |
173 | | |
174 | | where [[latex($\sigma$)]] is the material conductivity which depends on the electron-ion collision rate [[latex($\nu_{ei}$)]] which in term depends on the electron temperature [[latex($T^{-3/2}$)]]. [[BR]] |
| 170 | In cgs units, the real '''magnetic diffusivity''' can be written as:[[BR]] |
| 171 | |
| 172 | [[latex(${\displaystyle \eta = \frac{c^2}{4\pi \sigma} }$)]] |
| 173 | |
| 174 | where, [[latex($\sigma$)]] is the material conductivity which depends on the electron-ion collision rate [[latex($\nu_{ei}$)]] which in term depends on the electron temperature [[latex($T^{-3/2}$)]]. Note that magnetic diffusivity [[latex($ (\eta)$)]] is used interchangeably with resistivity [[latex($ (1 / \sigma)$)]] in some places of this wiki, but they are not the same. [[BR]] |