Implementación de particle-in-cell sobre GPUs para la simulación de plasma producido por Láser

摘要

The Particle-in-Cell (PIC) method is used to study the phase space evolution on some systems made of charged particles. In this work, a bidimensional PIC model is presented to make the analysis of an electrostatic plasma that is result of an ablation laser process with an isotermic expansion. Some Cloud-In-Cell (CIC) techniques are used, the Fast Fourier Transform, Finite Difference Method and Euler-Cromer. In each iteration CIC is used to make interpolations between charge and fields; with FFT the electrostatic potential is calculated in nodes of the grid, the electric field was obtained using central finite differences, with Euler-Cromer Method the positions and velocities of superparticles are updated. Also, the high parallelism profile of this kind of algorithms (PIC) is advantageous for the implementation using Graphics Processing Units (GPUs). Some results of plasma expansion are showed until 7.5 emission time; the superparticles displacement is analyzed on electrons and ions. Some acceleration was achieved.