Xwake 1.0: A new tool for wakefield and impedance calculations

摘要

Xwake, a user friendly Finite Difference Time Domain (FDTD) code for wakefield and impedance calculations of rotationally symmetric structures is described. Contrary to the traditional stepped edge or half cell approach used in other codes, Xwake 1.0 incorporates the contour modeling approach allowing it to accurately represent curved boundaries. Other features include a mesh generator that allows for the handling of lossy materials, dielectrics, and ferrites, modeling of regions that are simply or multiply connected and automatic dynamic memory management. Xwake 1.0 is a fully integrated interactive code and is distributed free of charge. Xwake is written in ANSI-C for portability and has been demonstrated to run on several Unix platforms. A graphical user interface (GUI) allows easy access to all the processing modules in the code. The GUI uses the OSF/Motifl.1 widget set and the X11R4 window system. Simulation results emphasizing its capabilities, in particular for a very slowly tapered beam pipe, are presented.