A low-energy-spread rf accelerator for a far-infrared free electron laser

C.A.J. van der Geer, R.J. Bakker, A.F.G. van der Meer, P.W. van Amersfoort, W.A. Gillespie, G. Saxon, M.W. Poole

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A high electron current and a small energy spread are essential for the operation of a free electron laser (FEL). In this paper we discuss the design and performance of the accelerator for FELIX, the free electron laser for infrared experiments. The system consists of a thermionic gun, a prebuncher, a buncher and two standard commercial linac sections. The gun is operated with a pulse duration of 280 ps and a bunch charge of 200 pC. After compression to 35 ps by the prebuncher, the bunches are accelerated to 4 MeV in the buncher and simultaneously compressed to 6 ps. The principle of the method is that the order of the electrons is conserved in the buncher, so that the resulting more or less linear energy-phase relationship along each bunch can be compensated effectively against space charge forces and the accelerating field gradient in the linacs, via an appropriate choice of the phase of the rf wave. Behind the linacs an rms energy spread of 0.30% has been measured.
    Original languageEnglish
    Pages (from-to)607-616
    Number of pages10
    JournalNuclear Instruments and Methods in Physics Research, A
    Volume334
    Issue number2-3
    DOIs
    Publication statusPublished - 1993

    Fingerprint

    Infrared lasers
    Free electron lasers
    free electron lasers
    infrared lasers
    Particle accelerators
    accelerators
    Electrons
    Electric space charge
    thermionics
    Infrared radiation
    energy
    space charge
    pulse duration
    electrons
    gradients
    Experiments

    Cite this

    van der Geer, C. A. J., Bakker, R. J., van der Meer, A. F. G., van Amersfoort, P. W., Gillespie, W. A., Saxon, G., & Poole, M. W. (1993). A low-energy-spread rf accelerator for a far-infrared free electron laser. Nuclear Instruments and Methods in Physics Research, A, 334(2-3), 607-616. https://doi.org/10.1016/0168-9002(93)90828-6
    van der Geer, C.A.J. ; Bakker, R.J. ; van der Meer, A.F.G. ; van Amersfoort, P.W. ; Gillespie, W.A. ; Saxon, G. ; Poole, M.W. / A low-energy-spread rf accelerator for a far-infrared free electron laser. In: Nuclear Instruments and Methods in Physics Research, A. 1993 ; Vol. 334, No. 2-3. pp. 607-616.
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    van der Geer, CAJ, Bakker, RJ, van der Meer, AFG, van Amersfoort, PW, Gillespie, WA, Saxon, G & Poole, MW 1993, 'A low-energy-spread rf accelerator for a far-infrared free electron laser', Nuclear Instruments and Methods in Physics Research, A, vol. 334, no. 2-3, pp. 607-616. https://doi.org/10.1016/0168-9002(93)90828-6

    A low-energy-spread rf accelerator for a far-infrared free electron laser. / van der Geer, C.A.J.; Bakker, R.J.; van der Meer, A.F.G.; van Amersfoort, P.W.; Gillespie, W.A.; Saxon, G.; Poole, M.W.

    In: Nuclear Instruments and Methods in Physics Research, A, Vol. 334, No. 2-3, 1993, p. 607-616.

    Research output: Contribution to journalArticle

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    AU - van Amersfoort, P.W.

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    AU - Saxon, G.

    AU - Poole, M.W.

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    van der Geer CAJ, Bakker RJ, van der Meer AFG, van Amersfoort PW, Gillespie WA, Saxon G et al. A low-energy-spread rf accelerator for a far-infrared free electron laser. Nuclear Instruments and Methods in Physics Research, A. 1993;334(2-3):607-616. https://doi.org/10.1016/0168-9002(93)90828-6