Demonstration of beam optics analysis, a 3D finite element charged particle code with adaptive meshing

A modern 3D finite element charged particle code has been developed with adaptive meshing. The new code includes both electrostatic and magnetostatic field solvers and particle pusher. The magnetic field solver uses tangential vector finite elements to solve for the vector potential. Results of some simple examples are given to demonstrate the code correctness and show the graphical user interface (GUI) that requires minimal user input and simplifies code operation.