Electromagnetic Emission from Laser Wakefields in Magnetized Underdense Plasmas

A wakefield driven by a short intense laser pulse in a perpendicularly magnetized underdense plasma is studied analytically and numerically for both weakly relativistic and highly relativistic situations. Owing to the DC magnetic field, a transverse component of the electric fields associated with t...

Full description

Saved in:
Bibliographic Details
Published inPlasma science & technology Vol. 14; no. 10; pp. 874 - 879
Main Author 胡志丹 盛政明 丁文君 王伟民 董全力 张杰
Format Journal Article
LanguageEnglish
Published 01.10.2012
Subjects
垂直磁化
太赫兹辐射
强激光脉冲
极端相对论
横向电场
电磁辐射
稀薄等离子体
等离子体激光
Online AccessGet full text
ISSN1009-0630
DOI10.1088/1009-0630/14/10/04

Cover

More Information
Summary:A wakefield driven by a short intense laser pulse in a perpendicularly magnetized underdense plasma is studied analytically and numerically for both weakly relativistic and highly relativistic situations. Owing to the DC magnetic field, a transverse component of the electric fields associated with the wakefield appears, while the longitudinal wave is not greatly affected by the magnetic field up to 22 Tesla. Moreover, the scaling law of the transverse field versus the longitudinal field is derived. One-dimensional particle-in-cell simulation results confirm the analytical results. Wakefield transmission through the plasma-vacuum boundary, where electromagnetic emission into vacuum occurs, is also investigated numerically. These results are useful for the generation of terahertz radiation and the diagnosis of laser wakefields.
Bibliography:HU Zhidan, SHENG Zhengming , DING Wenjun , WANG Weimin , DONG Quanli, ZHANG Jie（1.Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China;2.Key Laboratory for Laser Plasmas （Ministry of Education） and Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China）
laser wakefield; magnetized plasma; terahertz radiation; particle-in-cell simulation
A wakefield driven by a short intense laser pulse in a perpendicularly magnetized underdense plasma is studied analytically and numerically for both weakly relativistic and highly relativistic situations. Owing to the DC magnetic field, a transverse component of the electric fields associated with the wakefield appears, while the longitudinal wave is not greatly affected by the magnetic field up to 22 Tesla. Moreover, the scaling law of the transverse field versus the longitudinal field is derived. One-dimensional particle-in-cell simulation results confirm the analytical results. Wakefield transmission through the plasma-vacuum boundary, where electromagnetic emission into vacuum occurs, is also investigated numerically. These results are useful for the generation of terahertz radiation and the diagnosis of laser wakefields.
34-1187/TL
ISSN:1009-0630
DOI:10.1088/1009-0630/14/10/04