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Powerful terahertz emission from laser wakefields in plasmas for diagnostics

Published online by Cambridge University Press:  20 December 2006

Z.-M. SHENG
Affiliation:
Laboratory of Optical Physics, Institute of Physics, CAS, Beijing 100080, People's Republic of China (zmsheng@aphy.iphy.ac.cn)
J. ZHENG
Affiliation:
Laboratory of Optical Physics, Institute of Physics, CAS, Beijing 100080, People's Republic of China (zmsheng@aphy.iphy.ac.cn)
H.-C. WU
Affiliation:
Laboratory of Optical Physics, Institute of Physics, CAS, Beijing 100080, People's Republic of China (zmsheng@aphy.iphy.ac.cn)
J. ZHANG
Affiliation:
Laboratory of Optical Physics, Institute of Physics, CAS, Beijing 100080, People's Republic of China (zmsheng@aphy.iphy.ac.cn)
K. MIMA
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan

Abstract

Broadband coherent emission around the electron plasma frequency can be produced from a laser wakefield by linear mode conversion in inhomogeneous plasmas. In addition to its potential use as a powerful terahertz source, it can be used as diagnostics of the wakefield produced for particle acceleration. In this paper, some simulation results are presented on the wake emission when the wakefield is driven in the wavebreaking regime and driven inside a plasma channel.

Type
Papers
Copyright
2006 Cambridge University Press

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