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Title: Interplay of the Chirps and Chirped Pulse Compression in a High-Gain Seeded Free-Electron Laser

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930494
Report Number(s):
BNL-80421-2008-JA
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Optical Society of America B: Optical Physics; Journal Volume: 24
Country of Publication:
United States
Language:
English
Subject:
national synchrotron light source

Citation Formats

Wu,J., Murphy, J., Emma, P., Wang, X., Watanabe, T., and Zhong, X.. Interplay of the Chirps and Chirped Pulse Compression in a High-Gain Seeded Free-Electron Laser. United States: N. p., 2007. Web. doi:10.1364/JOSAB.24.000484.
Wu,J., Murphy, J., Emma, P., Wang, X., Watanabe, T., & Zhong, X.. Interplay of the Chirps and Chirped Pulse Compression in a High-Gain Seeded Free-Electron Laser. United States. doi:10.1364/JOSAB.24.000484.
Wu,J., Murphy, J., Emma, P., Wang, X., Watanabe, T., and Zhong, X.. Mon . "Interplay of the Chirps and Chirped Pulse Compression in a High-Gain Seeded Free-Electron Laser". United States. doi:10.1364/JOSAB.24.000484.
@article{osti_930494,
title = {Interplay of the Chirps and Chirped Pulse Compression in a High-Gain Seeded Free-Electron Laser},
author = {Wu,J. and Murphy, J. and Emma, P. and Wang, X. and Watanabe, T. and Zhong, X.},
abstractNote = {},
doi = {10.1364/JOSAB.24.000484},
journal = {Journal of the Optical Society of America B: Optical Physics},
number = ,
volume = 24,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • In a seeded high-gain Free-electron Laser (FEL), where a coherent laser pulse interacts with an ultra-relativistic electron beam, the seed laser pulse can be frequency chirped, and the electron beam can be energy chirped. Besides these two chirps, the FEL interaction introduces an intrinsic frequency chirp in the FEL even if the above mentioned two chirps are absent. In this paper we examine the interplay of these three chirps. The problem is formulated as an initial value problem, and solved via a Green function approach. Besides the chirp evolution, we also give analytical expressions for the pulse duration and bandwidthmore » of the FEL, which remains fully longitudinally coherent in the high gain exponential growth regime. Because the chirps are normally introduced for a final compression of the FEL pulse, some conceptual issues are discussed. We show that in order to get a short pulse duration, an energy chirp in the electron beam is necessary.« less
  • No abstract prepared.
  • In a seeded high-gain free-electron laser (FEL), where a coherent laser pulse interacts with an ultrarelativistic electron beam, the seed laser pulse can be frequency chirped, and the electron beam can be energy chirped. Besides these two chirps, the FEL interaction introduces an intrinsic frequency chirp in the FEL even if the above-mentioned two chirps are absent. We examine the interplay of these three chirps. The problem is formulated as an initial value problem and solved via a Green function approach. Besides the chirp evolution, we also give analytical expressions for the pulse duration and bandwidth of the FEL, whichmore » remains fully longitudinally coherent in the high-gain exponential growth regime. Because the chirps are normally introduced for a final compression of the FEL pulse, some conceptual issues are discussed. We show that to get a short pulse duration, an energy chirp in the electron beam is important.« less
  • When a short electron bunch traverses an undulator to radiate a wavelength longer than the bunch length, intense superradiance from the electron bunch can quickly deplete the electron’s kinetic energy and lead to generation of an isolated chirped radiation pulse. Here, we develop a theory to describe this novel chirped pulse radiation in a superradiant free-electron laser and show the opportunity to generate isolated few-cycle high-power radiation through chirped-pulse compression after the undulator. The theory is completely characterized by how fast the electron energy is depleted for a given length of an undulator. We further present two design examples atmore » the THz and extreme-ultraviolet wavelengths and numerically generate isolated three- and nine-cycle radiation pulses, respectively.« less
  • When a short electron bunch traverses an undulator to radiate a wavelength longer than the bunch length, intense superradiance from the electron bunch can quickly deplete the electron’s kinetic energy and lead to generation of an isolated chirped radiation pulse. Here, we develop a theory to describe this novel chirped pulse radiation in a superradiant free-electron laser and show the opportunity to generate isolated few-cycle high-power radiation through chirped-pulse compression after the undulator. The theory is completely characterized by how fast the electron energy is depleted for a given length of an undulator. We further present two design examples atmore » the THz and extreme-ultraviolet wavelengths and numerically generate isolated three- and nine-cycle radiation pulses, respectively.« less