title: Simulations of vacuum laser acceleration: hidden errors from particle's initial positions.
abstract: Simulation of vacuum laser acceleration, because of its scheme's simplicity, attracts many people involved in. However, how to put the particle in the initial positions in the field has not been considered seriously in some such schemes. An inattentive choice of electron's initial conditions may lead to misleading results. Here we show that arbitrarily placing the particle within the laser field leads to an overestimation of its energy gain, and offer suggestions for selecting appropriate initial conditions.
authors.affiliation: Center for Optical Research and Education, Department of Advanced Interdisciplinary Science, Graduate School of Engineering, Utsunomiya University, Utsunomiya, Japan. wpx@fudan.edu.cn
authors.forename: P X
authors.initials: PX
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Kawata
authors.forename: Y K
authors.initials: YK
authors.lastname: Ho
mesh_terms: D003198:Computer Simulation; D004583:Electrons; D007834:Lasers; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000379:methods*; D014618:Vacuum