Abstract
Parallel programming was applied to a simulation code, which will be used to examine the primary electron orbits in ion source plasmas. The motions of electrons are traced by a number of parallel processors. When high parallelized ratio can be achieved, highly effective acceleration of calculations will be obtained, if the data communication between parallel processors are well managed. Here we used 32 bit parallel microprocessors, that is, transputers of type T800 of 20 MHz, and Parallel FORTRAN. Transputers are connected with each other in high speed serial link lines. When we used 20 transputers, relative speed of 18.9 was achieved when a control program to manage the data communication was developed.