Cold Chamber. 2.5-dimensional Particle Simulation Software Parallel Algorithms

We always do our best to reduce dimension at whole hog in respect that the calculate amount of particle-simulate change with dimension number by power.It's not necessary to calculate electriferous particles's movement repeatly if plasma move consistently on one direction on all fours,but considered plasms as a series of solid-pole at the direction.The calculate time was saved at a large degree for just considering the pole' movement on the other two directions,in this way,the 3-Dquestion become to 2D. Based on the purpose,this paper research on the designs of parallel algorithm of CHIPIC2.5.First of all,the paper research on electromagnetic particle in cell simulation in 2-D Cartesian.According to the characteristic of CHIPIC,it analyses how to decompound simulate area and to change for data.With the idea of "divide-and-conquer",I complete the parallel work,and got the correct result together with efficiency.And then,it research on parallel simulation in 2-D cylindrical and polar coordinate systems.Aim at the difference between Cylindrical/polar and Cartesian,I keep my eye on the boundary process technology in Cylindrical and polar.While computing the electric fields or magnetic fields of a grid,it just needs the nearest magnetic fields or electric fields of the grid.I still adopt the idea of "divide-and-conquer" to complete the parallel work,and got the correct result together with efficiency.Finally the parallel work is completed for time-biased FDTD module in 2-D Cartesian,cylindrical and polar coordinate systems.Time-biased module is one of the most important modules in CHIPIC which is a kind of FDTD designed for filtrating hign-frequency noise,it can reduce the influence that hign frequency effect on calculate result at a large degree.Time bias and relaxation iterations are two improvement about field-calculating time-biased module has.The calculate amount of Time-biased is far more than that of center-difference,Time-biased is time-consuming.This shows that it is meaningful for us to bring parallel into Time-biased module.In the module of FDTD,we use magnetic fields at the time(t+1/2△t) to compute the electric fields at the time(t+△t),but in the module of time-biased FDTD,we compute the electric fields at the time with the magnetic fields at the time (t+3/2△t),(t+1/2△t)and(t-1/2△t),we set up the valueα₁,α₂,α₃according to the affect the magnetic give,we analyse the stability condition.Lastly,test the work with a LAN composed with 6 PC.The result indicate that the parallel algorithm is fight and good speedup and efficiency are acquired.