Self-fields in free-electron lasers with planar wiggler and ion-channel guiding
| Autor: | F B Jafary, B. Farokhi, Behrouz Maraghechi |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Free electron model Acoustics and Ultrasonics Wiggler Numerical analysis Condensed Matter Physics Laser Stability (probability) Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Computational physics Planar law Relativistic electron beam Atomic physics Beam (structure) |
| Zdroj: | Journal of Physics D: Applied Physics. 39:3742-3748 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/39/17/005 |
| Popis: | A theory of self-electric and self-magnetic fields of a relativistic electron beam passing through a one-dimensional planar wiggler and an ion-channel is presented. The equilibrium orbits and their stability, under the influence of self-electric and self-magnetic fields, are analysed. New unstable orbits, in the first part of the group I orbits, are found. It is shown that for a low energy and high density beam the self-fields can produce very large effects. Stabilities of quasi-steady-state orbits are investigated by analytical and numerical methods and perfect agreement was found. The theory of small signal gain is used to derive a formula for the gain with the self-field effects included. A numerical analysis is conducted to study the self-field effects on the quasi-steady-state orbits and the gain. |
| Databáze: | OpenAIRE |
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