0 a series of lines that represent the strength and direction of a field --
1 a series of lines that represent the strength and direction of a field --
This approach is formally equivalent to the determination of magnetic field lines, which satisfy the same mathematical equations.
Figure 9 shows the magnetic field lines at the six instants.
The other class comprises equilibria with straight magnetic axis and field lines lying in planes orthogonal to the axis.
The magnetic field lines, however, are no longer plane.
The poloidally closed grid lines again coincide with magnetic field lines.
In a magnetized plasma, we have a natural symmetry axis along the direction of the magnetic field lines.
Because the magnetic field lines resist "bending," such azimuthal asymmetries are not expected to grow and become unstable.
The plasma pressed by the magnetic field to the internal electrode is unstable because of an unfavorable curvature of the magnetic field lines.
