Chirped and modulated electron pulse free electron laser techniques

J. R. Henderson, L.T. Campbell, B.W.J. McNeil

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

A potential method to improve the free electron laser’s output when the electron pulse has a large energy spread is investigate and results presented. A simplified model is the first given, in which there are a number of linearly chirped beamlets equally separated in energy and time. By using chicanes, radiation from one chirped beamlet is passed to the next, helping to negate the effect of the beamlet chirps and maintaining resonant interactions. Hence the addition of chicane allow the electrons to interact with a smaller range of frequencies (Δω<2ργr), sustaining the FEL interaction. One method to generate such a beamlet structure is presented and is shown to increase FEL performance by two orders of magnitude.
LanguageEnglish
Title of host publicationProceedings of FEL2014
Subtitle of host publication36th International Free Electron Laser Conference
EditorsJan Chrin, Sven Reiche, Volker RW Schaa
Pages303-309
Number of pages7
Publication statusPublished - Jan 2015
Event36th International Free Electron Laser Conference - Basel, Switzerland
Duration: 25 Aug 201429 Aug 2014

Conference

Conference36th International Free Electron Laser Conference
Abbreviated titleFEL 2014
CountrySwitzerland
CityBasel
Period25/08/1429/08/14

Fingerprint

free electron lasers
sustaining
laser outputs
chirp
pulses
electrons
interactions
energy
radiation

Keywords

  • free electron laser
  • electron pulse
  • chirped beamlet

Cite this

Henderson, J. R., Campbell, L. T., & McNeil, B. W. J. (2015). Chirped and modulated electron pulse free electron laser techniques. In J. Chrin, S. Reiche, & V. RW. Schaa (Eds.), Proceedings of FEL2014: 36th International Free Electron Laser Conference (pp. 303-309). [MOC04]
Henderson, J. R. ; Campbell, L.T. ; McNeil, B.W.J. / Chirped and modulated electron pulse free electron laser techniques. Proceedings of FEL2014: 36th International Free Electron Laser Conference. editor / Jan Chrin ; Sven Reiche ; Volker RW Schaa. 2015. pp. 303-309
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Henderson, JR, Campbell, LT & McNeil, BWJ 2015, Chirped and modulated electron pulse free electron laser techniques. in J Chrin, S Reiche & VRW Schaa (eds), Proceedings of FEL2014: 36th International Free Electron Laser Conference., MOC04, pp. 303-309, 36th International Free Electron Laser Conference, Basel, Switzerland, 25/08/14.

Chirped and modulated electron pulse free electron laser techniques. / Henderson, J. R.; Campbell, L.T.; McNeil, B.W.J.

Proceedings of FEL2014: 36th International Free Electron Laser Conference. ed. / Jan Chrin; Sven Reiche; Volker RW Schaa. 2015. p. 303-309 MOC04.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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T1 - Chirped and modulated electron pulse free electron laser techniques

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N2 - A potential method to improve the free electron laser’s output when the electron pulse has a large energy spread is investigate and results presented. A simplified model is the first given, in which there are a number of linearly chirped beamlets equally separated in energy and time. By using chicanes, radiation from one chirped beamlet is passed to the next, helping to negate the effect of the beamlet chirps and maintaining resonant interactions. Hence the addition of chicane allow the electrons to interact with a smaller range of frequencies (Δω<2ργr), sustaining the FEL interaction. One method to generate such a beamlet structure is presented and is shown to increase FEL performance by two orders of magnitude.

AB - A potential method to improve the free electron laser’s output when the electron pulse has a large energy spread is investigate and results presented. A simplified model is the first given, in which there are a number of linearly chirped beamlets equally separated in energy and time. By using chicanes, radiation from one chirped beamlet is passed to the next, helping to negate the effect of the beamlet chirps and maintaining resonant interactions. Hence the addition of chicane allow the electrons to interact with a smaller range of frequencies (Δω<2ργr), sustaining the FEL interaction. One method to generate such a beamlet structure is presented and is shown to increase FEL performance by two orders of magnitude.

KW - free electron laser

KW - electron pulse

KW - chirped beamlet

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M3 - Conference contribution book

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Henderson JR, Campbell LT, McNeil BWJ. Chirped and modulated electron pulse free electron laser techniques. In Chrin J, Reiche S, Schaa VRW, editors, Proceedings of FEL2014: 36th International Free Electron Laser Conference. 2015. p. 303-309. MOC04