A beam dynamics calculation based on PIC method

We had accomplished a code for beam tracking based on Particle In Cell(PIC) method with rectangular meshes. This type of code by PIC method can calculate the self-consistent interaction between charged particles and electromagnetic field in cavities. Therefore, this kind of code should be used widely for designing a linac, particularly for a low energy section such as buncher or heavy beam loading structures. The code that we made first used the rectangular meshes to discrete the field in domain. Although it is easy to make the program that use rectangular meshes, there are larger error on the boundary than triangular meshes. Therefore we make a program which use triangular meshes to reduce an error on the boundary. In this paper we present a current status and a few problem on programming. (author)