Electron acceleration by a tightly focused cylindrical vector Gaussian beam. (22nd December 2016)

• Record Type: Journal Article
• Authors: Xu, Jian; Yang, Zhen-Jun; Li, Jian-Xing; Zang, Wei-Ping
• Is Part Of: Laser physics letters. Volume 14:Number 2(2017:Feb.)
• Publication Date: 2016-12-22
• Subjects: electron acceleration -- focusing property -- tightly focused beam; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa519f
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We have studied the electron acceleration by a tightly focused cylindrical vector Gaussian beam. Different from the Lax series field, cylindrical vector Gaussian beams are vector-beam solutions of Maxwell's equations and its focusing property can be numerically analyzed by the Richards–Wolf vectorial diffraction theory. Field differences exist between the cylindrical vector Gaussian beam and the Lax series field. The cylindrical vector Gaussian beam increases the asymmetry of the electromagnetic fields, which is more beneficial to the electron acceleration. When the beam waist falls down to the order of the wavelength, the high laser intensity zone is more proper to define the reflection, capture and transmission conditions of the electrons. The injection energy and the injected angle of the electron and the initial phase of the laser beam play important roles for the electron to enter and be trapped by the high laser intensity zone.