Proposal for a race-track microtron with high peak current

G.J. Ernst, E.H. Haselhoff, W.J. Witteman, J.I.M. Botman, W. van Genderen, H.L. Hagedoorn, J.A. van der Heide, W.J.G.M. Kleeven

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Abstract

In order to obtain high gain in a free electron laser a high-quality electron beam with high peak current is required. It is well-known that a microtron is able to produce a high-quality beam having low emittance and small energy spread (1%). Because a circular microtron has a limited high-current capability a race-track design is adopted for providing flexibility, better beam quality and of course higher peak current in the microbunch. Space charge problems may be severe in a microtron. It can be shown that bunching on certain specific subharmonic frequencies will lead to a strong reduction of the space charge problems. The general layout of our microtron design will be presented. The characteristics are: energy 25 MeV, micropulse 10° of the rf frequency of 3 GHz. Our aim is to come beyond the present state of the art with the following characteristics: relative energy spread 0.001, emittance 3 mm mrad, current in the micropulse 100 A, macropulse length 50 μs and subharmonic bunching at 1:64.
Original languageUndefined
Pages (from-to)71-75
JournalNuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
Volume285
Issue number1-2
DOIs
Publication statusPublished - 1989

Keywords

  • IR-70457

Cite this

Ernst, G. J., Haselhoff, E. H., Witteman, W. J., Botman, J. I. M., van Genderen, W., Hagedoorn, H. L., ... Kleeven, W. J. G. M. (1989). Proposal for a race-track microtron with high peak current. Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, 285(1-2), 71-75. https://doi.org/10.1016/0168-9002(89)90428-2