 
The MLD
package is a suite of programs for the computation of the potential
distribution in axially symmetric magnetic lenses that can saturate (the
potential used in the computation is the magnetic flux) and for
the computation of the electron optical properties of these fields.
Key Benefits
 Magnetic lens computation can be performed with very high accuracy
in a mesh with up to 200000 mesh points (the 200000 equations are
solved in about a minute on 1 GHz PC computer).
 Invaluable information for the designer provides the graphical
display of the results such as axial flux density distribution, the
distribution of flux lines and, in particular, the distribution of
magnetic flux density inside the magnetic circuit.
 Up to 6 different magnetic materials, each specified by its
magnetization curve, can be computed at once.
 Electron optical properties of the magnetic lens used as a
projective or an objective lens are computed. The program can
determine in the given magnetic field the beam voltage needed for given image and object positions or
image properties and aberrations for given set of initial conditions.
Geometry of a test
magnetic lens with computed axial flux density.
Flux density distribution on the
axis and in the part of the magnetic circuit.
