Virtual dielectric waveguide mode description of a high-gain free-electron laser. II. Modeling and numerical simulations

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Erik Hemsing,¹ Avraham Gover,² and James Rosenzweig¹
¹Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
²Faculty of Engineering, Department of Physical Electronics, Tel-Aviv University, Ramat-Aviv 69978, Tel-Aviv, Israel

Received 15 February 2008; published 20 June 2008

Ahigh-gain free-electron laser is modeled using an expansion of theradiation field in terms of guided Laguerre-Gaussian modes of avirtual dielectric waveguide [E. Hemsing, A. Gover, and J. Rosenzweig,preceding paper, Phys Rev. A 77, 063830 (2008)]. The radiationprofile evolution, power gain, and detuning efficiency characteristics are investigatedfor seeding with fundamental Gaussian and higher-order Laguerre-Gaussian input modeson a Gaussian e-beam in the collective regime. The fullwave evolution solution at different seed radiation injection conditions resultsin determination of the optimal waist size and waist positionof the seed radiation beam for maximum power coupling efficiency.Results for guided mode evolution and power gain are shownto be consistent with simulations performed with the code GENESIS1.3. The amplification and spontaneous generation of FEL radiation withorbital angular momentum is also considered.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.77.063831
DOI:	10.1103/PhysRevA.77.063831
PACS:	42.25.Dd; 41.60.Cr; 42.60.Jf; 42.50.Tx 42.25.Dd Wave propagation in random media (wave optics) 41.60.Cr Free-electron lasers 42.60.Jf Laser beam characteristics 42.50.Tx Optical angular momentum and its quantum aspects YEAR: 2008
KEYWORDS:	angular momentum, free electron lasers, Gaussian processes, laser tuning, waveguide lasers

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E. Hemsing, A. Gover, and J. Rosenzweig, preceding paper, Phys. Rev. A 77, 063830 (2008).
L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, and J. P. Woerdman, Phys. Rev. A 45, 8185 (1992).
G. Andonian et al., Phys. Rev. Lett. 95, 054801 (2005).
A. Tremaine et al., Phys. Rev. Lett. 88, 204801 (2002).
A. Murokh et al., Phys. Rev. E 67, 066501 (2003).
X. J. Wang, T. Watanabe, Y. Shen, R. K. Li, J. B. Murphy, T. Tsang, and H. P. Freund, Appl. Phys. Lett. 91, 181115 (2007).