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dc.contributor.authorFreund, Henry P.pt_BR
dc.contributor.authorSprangle, P.pt_BR
dc.contributor.authorDillenburg, Darcypt_BR
dc.contributor.authorJornada, Eda Homrich dapt_BR
dc.contributor.authorSchneider, Ruth de Souzapt_BR
dc.contributor.authorLiberman, Bernardopt_BR
dc.date.accessioned2011-01-22T05:59:03Zpt_BR
dc.date.issued1982pt_BR
dc.identifier.issn0556-2791pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/27467pt_BR
dc.description.abstractThe collective interaction in a free-electroii laser with combined helical wiggler and uniform axial guide fields is presented in the linearized regime. The analysis involves a perturbation of the Vlasov-Maxwell equations about the constant-velocity helical trajectories, and the general driving currents are derived for this configuration. The complete dispersion equation is then obtained for a monoenergetic beam. Analytic solutions are obtained in tlie strong pump and space-charge dominated regimes, and an extensive numerical analysis is presented for a wide range of operating parameters. The results indicate that substantial enhancements in the gain are possible when the relativistic axial gyrofrequency is comparable to the free-electron laser doppler upshift. In addition, there is a range of parameters for which the ponderomotive potential acts to destabilize the electron beam. In this regime, we find both unstable electrostatic beam modes and largely electromagnetic modes with broad bandwidths.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. A, General physics. New York. Vol. 26, n. 4 (oct. 1982), p. 2004-2015pt_BR
dc.rightsOpen Accessen
dc.subjectFisica dos fluidos, fisica dos plasmas e descargas eletricaspt_BR
dc.subjectLaserspt_BR
dc.subjectPlasmaspt_BR
dc.subjectSimetriaspt_BR
dc.titleCollective effects on the operation of free-eletron lasers with an axial guide fieldpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000036830pt_BR
dc.type.originEstrangeiropt_BR


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