Microwave Tube Electronic Optical Simulator High Performance Computing Research

The huge data need to be calculated in three dimensional (3-D) simulation forelectron optics of microwave tubes. It cost much time. The optimized technique toElectron Optics Simulator (EOS) will help to promote computation velocity and savethe design time.In this dissertation, the Electron Optics Simulator (EOS), developed by Universityof Electron Science and Technology of China, is put forward in two aspects. First, themore accurate physical model and efficient simulation algorithm are proposed, and thereare implemented and tested in improved EOS. Second, the code optimized techniquesare used to improve the source code of EOS. The main content of dissertation include:1. The physical models for CAD software of Electron Optics Simulator ofmicrowave tubes are studied. The work flow of simulation is optimized. The symmetryof structure of electron optics is considered. The3-D and2-D symmetry algorithms areimplemented to reduce computation domain and the calculation precision is kept withthe less mesh. LU matrix decomposed method is used to solve stiffness matrix to savethe electric field computation time, and the OpenMP is used to trace trajectory.Performance analyzed tools of Microwave Visual Studio2005are used to analyzethe EOS code. The particle quickly localized algorithm in finite element mesh is causingbottlenecks in the EOS code. Two advanced search methods are put forward.Some computer code optimized methods are applied to optimize the EOS code.The function of compute electric field is optimized with calculation cycle expanded andthe usage of computer memory is optimized. The performance of pre-and post-optimized EOS are compared. The optimized EOS save the much time with the sameaccuracy in simulating many cased.