Physics 364 Assignment 2
Due November 7
 Kivelson and Russell 2.5.
 Kivelson and Russell 2.6.
 Using the magnetic field line equations, write
the magnitude of the dipole magentic field in terms of the :
 L paramter and radial distance r,
 L parameter and the latitude λ.

Consider a B field that is purely in the xdirection with the form:
B(z) = B_{0} tanh(z/d)
Find the current density (magnitude and direction) and the
plasma pressure distribution for this equilibrium.