| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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The effects of self-fields on the electron trajectory in a two-stream free electron laser with a helical wiggler and an axial guiding magnetic field |
| S. Saviza, E. Lashania, Farzin M. Aghamirb |
a Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, P.O. Box 14665-678, Iran;
b Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399, Iran |
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Abstract A theory for the two-stream free-electron laser (TSFEL) with a helical wiggler and an axial guide magnetic field is developed. In the analysis, the effects of self-fields are taken into account. An analysis of the two-stream steady-state electron trajectories is given by solving the equation of motion. Numerical calculations show that there are seven groups of orbits in the presence of self-fields instead of two groups reported in the absence of self-fields. The stability of the trajectories is studied numerically.
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Received: 06 February 2012
Revised: 01 March 2012
Accepted manuscript online:
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PACS:
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41.60.Cr
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(Free-electron lasers)
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| Fund: Project supported by the Plasma Physics Research Center, Science and Research Branch, Islamic Azad University. |
Corresponding Authors:
S. Saviz
E-mail: shahrooz.saviz@srbiau.ac.ir
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Cite this article:
S. Saviz, E. Lashani, Farzin M. Aghamir The effects of self-fields on the electron trajectory in a two-stream free electron laser with a helical wiggler and an axial guiding magnetic field 2012 Chin. Phys. B 21 104104
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