THE BOUNDARY-FITTED COORDINATE METHOD TO IMPROVE THE NUMERICAL-ANALYSIS OF ELECTRON-OPTICAL SYSTEMS

This paper illustrates some of the advantages of using the boundary fi tted coordinate technique in the numerical simulation of electron-opti cal systems. The boundary fitted coordinate technique cm be used as an automatic mesh generator for the finite-element solution of field dis tributions, while at the same time allowing for die possibility of hig h order interpolation on the mesh, typically required for the accurate plotting of electron trajectory paths. For die finite difference meth od of solving field distributions, the boundary fitted coordinate meth od can generate regular meshes, which fit curved shaped boundaries.