On improving the particle-in-cell simulations accuracy for sources of charged particles
Creation of initial distribution of macroparticles in phase space in the case of electron or ion sources modeling is an important aspect. In this work we will discuss the two main approaches to particles creation random and quiet start. In the case of random distribution,
we need less number of macroparticles but it can reduce solution accuracy due to a growth of numerical noises. Numerical noises in solution obtained some particles method manifested primarily in fluctuation the space-charge density distribution. We introduce the criteria for measurement this fluctuation based on a comparison the density distribution with the some “etalon” solution with minimized fluctuations. An approach based on the application of different noise filters is used for suppress the fluctuation. The results of measurements the solution accuracy in the case of planar diode are presented.
CYBERNETICS AND PHYSICS, Vol. 5, No. 1, 2016, 16–20.