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Modelling elliptically polarised free electron lasers

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Modelling elliptically polarised free electron lasers. / Henderson, James Robert; Campbell, L. T.; Freund, H. P.; McNeil, B. W. J.

In: New Journal of Physics, Vol. 18, 062003, 20.06.2016.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Henderson, JR, Campbell, LT, Freund, HP & McNeil, BWJ 2016, 'Modelling elliptically polarised free electron lasers', New Journal of Physics, vol. 18, 062003. https://doi.org/10.1088/1367-2630/18/6/062003

APA

Henderson, J. R., Campbell, L. T., Freund, H. P., & McNeil, B. W. J. (2016). Modelling elliptically polarised free electron lasers. New Journal of Physics, 18, [062003]. https://doi.org/10.1088/1367-2630/18/6/062003

Vancouver

Henderson JR, Campbell LT, Freund HP, McNeil BWJ. Modelling elliptically polarised free electron lasers. New Journal of Physics. 2016 Jun 20;18. 062003. https://doi.org/10.1088/1367-2630/18/6/062003

Author

Henderson, James Robert ; Campbell, L. T. ; Freund, H. P. ; McNeil, B. W. J. / Modelling elliptically polarised free electron lasers. In: New Journal of Physics. 2016 ; Vol. 18.

Bibtex

@article{17b0a5e9965a4db68432ecc249e00ff3,
title = "Modelling elliptically polarised free electron lasers",
abstract = "A model of a free electron laser (FEL) operating with an elliptically polarised undulator is presented. The equations describing the FEL interaction, including resonant harmonic radiation fields, are averaged over an undulator period and generate a generalised Bessel function scaling factor, similar to that of planar undulator FEL theory. Comparison between simulations of the averaged model with those of an unaveraged model show very good agreement in the linear regime. Two unexpected results were found. Firstly, an increased coupling to harmonics for elliptical rather than planar polarisarised undulators. Secondly, and thought to be unrelated to the undulator polarisation, a significantly different evolution between the averaged and unaveraged simulations of the harmonic radiation evolution approaching FEL saturation.",
author = "Henderson, {James Robert} and Campbell, {L. T.} and Freund, {H. P.} and McNeil, {B. W. J.}",
year = "2016",
month = jun,
day = "20",
doi = "10.1088/1367-2630/18/6/062003",
language = "English",
volume = "18",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd",

}

RIS

TY - JOUR

T1 - Modelling elliptically polarised free electron lasers

AU - Henderson, James Robert

AU - Campbell, L. T.

AU - Freund, H. P.

AU - McNeil, B. W. J.

PY - 2016/6/20

Y1 - 2016/6/20

N2 - A model of a free electron laser (FEL) operating with an elliptically polarised undulator is presented. The equations describing the FEL interaction, including resonant harmonic radiation fields, are averaged over an undulator period and generate a generalised Bessel function scaling factor, similar to that of planar undulator FEL theory. Comparison between simulations of the averaged model with those of an unaveraged model show very good agreement in the linear regime. Two unexpected results were found. Firstly, an increased coupling to harmonics for elliptical rather than planar polarisarised undulators. Secondly, and thought to be unrelated to the undulator polarisation, a significantly different evolution between the averaged and unaveraged simulations of the harmonic radiation evolution approaching FEL saturation.

AB - A model of a free electron laser (FEL) operating with an elliptically polarised undulator is presented. The equations describing the FEL interaction, including resonant harmonic radiation fields, are averaged over an undulator period and generate a generalised Bessel function scaling factor, similar to that of planar undulator FEL theory. Comparison between simulations of the averaged model with those of an unaveraged model show very good agreement in the linear regime. Two unexpected results were found. Firstly, an increased coupling to harmonics for elliptical rather than planar polarisarised undulators. Secondly, and thought to be unrelated to the undulator polarisation, a significantly different evolution between the averaged and unaveraged simulations of the harmonic radiation evolution approaching FEL saturation.

U2 - 10.1088/1367-2630/18/6/062003

DO - 10.1088/1367-2630/18/6/062003

M3 - Journal article

VL - 18

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 062003

ER -