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The sensitivity of nonlinear harmonic generation to electron beam quality in free electron lasers

Biedron, Sandra G. LU ; Huang, ZR; Kim, KJ; Milton, S; Dattoli, G; Ottaviani, PL; Renieri, A; Fawley, WM; Freund, HP and Nuhn, HD (2002) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 483(1-2). p.101-106
Abstract
The generation of harmonics through a nonlinear mechanism driven by bunching at the fundamental has sparked interest as a path toward enhancing and extending the usefulness of an X-ray free-electron laser (FEL) facility. The sensitivity of the nonlinear harmonic generation to undulator imperfections, electron beam energy spread, peak current, and emittance is important in an evaluation of the process. Typically, linear instabilities in FELs are characterized by increased sensitivity to both electron beam and undulator quality with increasing harmonic number. However, since the nonlinear harmonic generation mechanism is driven by the growth of the fundamental, the sensitivity of the nonlinear harmonic mechanism is not expected to be... (More)
The generation of harmonics through a nonlinear mechanism driven by bunching at the fundamental has sparked interest as a path toward enhancing and extending the usefulness of an X-ray free-electron laser (FEL) facility. The sensitivity of the nonlinear harmonic generation to undulator imperfections, electron beam energy spread, peak current, and emittance is important in an evaluation of the process. Typically, linear instabilities in FELs are characterized by increased sensitivity to both electron beam and undulator quality with increasing harmonic number. However, since the nonlinear harmonic generation mechanism is driven by the growth of the fundamental, the sensitivity of the nonlinear harmonic mechanism is not expected to be significantly greater than that of the fundamental. In this paper, we study the effects of electron beam quality, more specifically, emittance, energy spread, and peak current, on the nonlinear harmonics in a 1.5-Angstrom FEL, and show that the decline in the harmonic emission roughly follows that of the fundamental. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
intense particle beams and radiation sources, frequency conversion, free-electron lasers, harmonic generation
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
483
issue
1-2
pages
101 - 106
publisher
Elsevier
external identifiers
  • wos:000176527000020
  • scopus:0036567627
ISSN
0167-5087
DOI
10.1016/S0168-9002(02)00292-9
language
English
LU publication?
yes
id
ec44d421-8ee1-4838-bae2-dda4fd20bd8c (old id 334355)
date added to LUP
2007-08-10 09:00:48
date last changed
2017-01-01 06:58:19
@article{ec44d421-8ee1-4838-bae2-dda4fd20bd8c,
  abstract     = {The generation of harmonics through a nonlinear mechanism driven by bunching at the fundamental has sparked interest as a path toward enhancing and extending the usefulness of an X-ray free-electron laser (FEL) facility. The sensitivity of the nonlinear harmonic generation to undulator imperfections, electron beam energy spread, peak current, and emittance is important in an evaluation of the process. Typically, linear instabilities in FELs are characterized by increased sensitivity to both electron beam and undulator quality with increasing harmonic number. However, since the nonlinear harmonic generation mechanism is driven by the growth of the fundamental, the sensitivity of the nonlinear harmonic mechanism is not expected to be significantly greater than that of the fundamental. In this paper, we study the effects of electron beam quality, more specifically, emittance, energy spread, and peak current, on the nonlinear harmonics in a 1.5-Angstrom FEL, and show that the decline in the harmonic emission roughly follows that of the fundamental. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Biedron, Sandra G. and Huang, ZR and Kim, KJ and Milton, S and Dattoli, G and Ottaviani, PL and Renieri, A and Fawley, WM and Freund, HP and Nuhn, HD},
  issn         = {0167-5087},
  keyword      = {intense particle beams and radiation sources,frequency conversion,free-electron lasers,harmonic generation},
  language     = {eng},
  number       = {1-2},
  pages        = {101--106},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {The sensitivity of nonlinear harmonic generation to electron beam quality in free electron lasers},
  url          = {http://dx.doi.org/10.1016/S0168-9002(02)00292-9},
  volume       = {483},
  year         = {2002},
}