6 documents found, page 1 of 1
A new field solver for modeling of relativistic particle-laser interactions usi...
Li, F.; Miller, K. G.; Xu, X.; Tsung, F. S.; Decyk, V. K.; An, W.; Fonseca, R. A.; Mori, W. B.A customized finite-difference field solver for the particle-in-cell (PIC) algorithm that provides higher fidelity for wave-particle interactions in intense electromagnetic waves is presented. In many problems of interest, particles with relativistic energies interact with intense electromagnetic fields that have phase velocities near the speed of light. Numerical errors can arise due to (1) dispersion errors i...
Controlling the numerical Cerenkov instability in PIC simulations using a custo...
Li, F.; Yu, P. C.; Xu, X.; Fiuza, F.; Decyk, V. K.; Dalichaouch, T.; Davidson, A.; Tableman, A.; An, W.; Tsung, F. S.; Fonseca, R. A.; Lu, W.In this paper we present a customized finite-difference-time-domain (FDTD) Maxwell solver for the particle-in-cell (PIC) algorithm. The solver is customized to effectively eliminate the numerical Cerenkov instability (NCI) which arises when a plasma (neutral or non-neutral) relativistically drifts on a grid when using the PIC algorithm. We control the EM dispersion curve in the direction of the plasma drift of ...
Enabling Lorentz boosted frame particle-in-cell simulations of laser wakefield ...
Yu, P.; Xu, X.; Davidson, A.; Tableman, A.; Dalichaouch, T.; Li, F.; Meyers, M. D.; An, W.; Tsung, F. S.; Decyk, V. K.; Fiuza, F.; Vieira, J.When modeling laser wakefield acceleration (LWFA) using the particle-in-cell (PIC) algorithm in a Lorentz boosted frame, the plasma is drifting relativistically at beta(b)c towards the laser, which can lead to a computational speedup of similar to gamma(2)(b)=(1-beta(2)(b))-1. Meanwhile, when LWFA is modeled in the quasi-3D geometry in which the electromagnetic fields and current are decomposed into a limited n...
Implementation of a hybrid particle code with a PIC description in r-z and a gr...
Davidson, A. W.; Tableman, A.; An, W.; Tsung, F. S.; Lu, W.; Vieira, J.; Fonseca, R. A.; Silva, L. O.; Mori, W. B.For many plasma physics problems, three-dimensional and kinetic effects are very important. However, such simulations are very computationally intensive. Fortunately, there is a class of problems for which there is nearly azimuthal symmetry and the dominant three-dimensional physics is captured by the inclusion of only a few azimuthal harmonics. Recently, it was proposed [1] to model one such problem, laser wak...
Modeling of laser wakefield acceleration in Lorentz boosted frame using EM-PIC ...
Yu, P.; Xu, X.; Decyk, V. K.; An, W.; Vieira, J.; Tsung, F. S.; Fonseca, R. A.; Lu, W.; Silva, L. O.; Mori, W. B.Simulating laser wakefield acceleration (LWFA) in a Lorentz boosted frame in which the plasma drifts towards the laser with nu(b) can speed up the simulation by factors of gamma(2)(b) = (1 nu(2)(b)/c(2))(-1). In these simulations the relativistic drifting plasma inevitably induces a high frequency numerical instability that contaminates the interesting physics. Various approaches have been proposed to mitigate ...
A proposed experimental test of proton-driven plasma wakefield acceleration bas...
Xia, G.; Caldwell, A.; Lotov, K.; Pukhov, A.; Assmann, R.; Zimmermann, F.; Huang, C.; Vieira, J.; Lopes, N.; Fonseca, R. A.; Silva, L. O.; An, W.Proton-bunch driven plasma wakefield acceleration (PDPWA) has been proposed as an approach to accelerate electron beam to TeV energy regime in a single plasma section. An experimental test has recently proposed to demonstrate the capability of PDPWA by using proton beams from the CERN SPS. The layout of the experiment is introduced. Particle-in-cell simulation results based on the realistic beam parameters are ...