Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.
Abstract
In a high-gain free-electron laser, strong bunching at the fundamental wavelength can drive substantial harmonic bunching and sizable power levels at the harmonic frequencies. In this paper, we investigate the three-dimensional evolution of the harmonic fields based on the coupled Maxwell-Vlasov equations that take into account the nonlinear harmonic interaction. Each harmonic field is the sum of a self-amplified term and a term driven by the nonlinear harmonic interaction. In the exponential gain regime, the growth rate of the dominant nonlinear term is much faster than that of the self-amplified harmonic field. As a result, the gain length and the transverse profile of the first few harmonics are completely determined by those of the fundamental. A percentage of the fundamental power level is found at the third harmonic frequency right before saturation for the current self-amplified spontaneous emission projects.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab., IL (US)
- Sponsoring Org.:
- US Department of Energy (US)
- OSTI Identifier:
- 11814
- Report Number(s):
- ANL/ASD/CP-99050
TRN: US0102139
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Conference
- Resource Relation:
- Conference: 21st International Free Electron Laser Conference, Hamburg (DE), 08/23/1999--08/28/1999; Other Information: PBD: 1 Sep 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; FREE ELECTRON LASERS; HARMONIC GENERATION; SATURATION; THREE-DIMENSIONAL CALCULATIONS; BEAM BUNCHING; BOLTZMANN-VLASOV EQUATION
Citation Formats
Huang, Z, and Kim, K -J. Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.. United States: N. p., 1999.
Web.
Huang, Z, & Kim, K -J. Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.. United States.
Huang, Z, and Kim, K -J. 1999.
"Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.". United States. https://www.osti.gov/servlets/purl/11814.
@article{osti_11814,
title = {Three-dimensional analysis of harmonic generation in self-amplified spontaneous emission.},
author = {Huang, Z and Kim, K -J},
abstractNote = {In a high-gain free-electron laser, strong bunching at the fundamental wavelength can drive substantial harmonic bunching and sizable power levels at the harmonic frequencies. In this paper, we investigate the three-dimensional evolution of the harmonic fields based on the coupled Maxwell-Vlasov equations that take into account the nonlinear harmonic interaction. Each harmonic field is the sum of a self-amplified term and a term driven by the nonlinear harmonic interaction. In the exponential gain regime, the growth rate of the dominant nonlinear term is much faster than that of the self-amplified harmonic field. As a result, the gain length and the transverse profile of the first few harmonics are completely determined by those of the fundamental. A percentage of the fundamental power level is found at the third harmonic frequency right before saturation for the current self-amplified spontaneous emission projects.},
doi = {},
url = {https://www.osti.gov/biblio/11814},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1999},
month = {Wed Sep 01 00:00:00 EDT 1999}
}