FN_J

FN_J = <Quantity 2.52325916e-07 A / m2>

Current density normalization for MAS, in SI (A m⁻²).

From Ampère’s law \(\mathbf{J} = \mu_0^{-1}\nabla\times\mathbf{B}\) (SI):

\[J_0 = \frac{B_0}{\mu_0\,L_0}.\]

SI unit are used here because current density in Gaussian CGS (statampere cm⁻²) is rarely used in practice. See FN_J_CGS for the Gaussian equivalent.