The effect of linear induced phase fluctuations on the gain of a Cerenkov FEL

Peter van der Slot, Isabel de la Fuente, Klaus Boller

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Abstract

In a Cerenkov FEL (CFEL), the phase velocity of an EM wave is determined by geometry (i.e., waveguide radius and inner liner radius) and by material parameters (i.e., the dielectric constant of the liner). Changes or fluctuations in any of these parameters induce changes (or fluctuations) in the phase velocity of the EM wave and thus can degrade the gain of the CFEL. To investigate the effect of such fluctuations on the gain, a method is developed to describe the effect of a slowly varying inner liner radius on the EM wave propagation and consequently on the gain of the CFEL. As an example, results for a low gain, 800 mA Cerenkov FEL operating at a frequency of 50 GHz and a maximum beam voltage of 100 kV are presented.
Original languageEnglish
Title of host publicationFEL 2004
Subtitle of host publication26th International Free Electron Laser Conference & 11th FEL Users Workshop
EditorsRené Bakker, Luca Giannessi, Marino Marsi, Richard Walker
Place of PublicationTrieste
PublisherComitato Conferenze Elettra
Pages53-56
Number of pages4
ISBN (Print)88-87992-02-9
Publication statusPublished - 29 Aug 2005
Event26th International Free Electron Laser Conference, FEL 2004 - Trieste, Italy
Duration: 29 Aug 20043 Sep 2004
Conference number: 26

Conference

Conference26th International Free Electron Laser Conference, FEL 2004
Abbreviated titleFEL
CountryItaly
CityTrieste
Period29/08/043/09/04

Keywords

  • METIS-226258

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    van der Slot, P., de la Fuente, I., & Boller, K. (2005). The effect of linear induced phase fluctuations on the gain of a Cerenkov FEL. In R. Bakker, L. Giannessi, M. Marsi, & R. Walker (Eds.), FEL 2004: 26th International Free Electron Laser Conference & 11th FEL Users Workshop (pp. 53-56). Trieste: Comitato Conferenze Elettra.