Stochasticity caused by radiation misalignment in magnetized free-electron lasers with trapped particles

1991 ◽  
Vol 45 (3) ◽  
pp. 339-353 ◽  
Author(s):  
F. B. Rizzato
Keyword(s):  
Numerical Analysis ◽  
Transverse Momentum ◽  
Wave Vector ◽  
Free Electron ◽  
Global Symmetry ◽  
Free Electron Lasers ◽  
Trapped Particles ◽  
Laser Wave ◽  
Theoretical And Numerical Analysis ◽  
Weakly Dependent

A theoretical and numerical analysis is performed on the conditions under which electron stochastic detrapping due to small misalignments between the laser wave vector and the global symmetry of the system occurs in magnetically guided free-electron lasers. In particular, it is shown that the threshold for stochasticity is only weakly dependent on the transverse momentum of trapped particles, which allows some simple general conclusions to be drawn regarding the maximum values allowed for this misalignment.

Laser wave undulators and high gain X-ray free electron lasers

1999 ◽  
Vol 257 (1-2) ◽  
pp. 26-30 ◽  
Author(s):  
G Dattoli ◽  
C Retardi ◽  
R Vazquez
Keyword(s):  
Free Electron ◽  
High Gain ◽  
Free Electron Lasers ◽  
X Ray ◽  
Laser Wave

Main-signal filamentation in free-electron lasers with deeply trapped particles

1990 ◽  
Vol 44 (1) ◽  
pp. 33-45 ◽  
Author(s):  
F. B. Rizzato
Keyword(s):  
Electric Fields ◽  
Free Electron ◽  
Free Electron Laser ◽  
Electromagnetic Waves ◽  
Transverse Electric ◽  
Low Frequency ◽  
Fast Wave ◽  
Free Electron Lasers ◽  
Trapped Particles ◽  
Transverse Electric Fields

The filamentation of electromagnetic waves in a free-electron laser with deeply trapped electrons is analysed. This instability is the result of particle bunching along transverse directions (with respect to the fast wave vector), as opposed to the untrapped-electron case, where it is a result of longitudinal bunching. Two cases are considered: (i) the non-resonant or reactive one, with purely imaginary growth rates; and (ii) the resonant one, with large (small) values of the real (imaginary) part of the perturbing frequency. In particular, we find that the reactive instability occurs only when the wiggler amplitude is unusually large. On the other hand, we show that the resonant process (with frequencies close to the synchrotron frequency) may be relevant for conventional free-electron lasers and that the growth rate for quasi-trans verse perturbations may be larger than that corresponding to longitudinal perturbations. Owing to the inhomogeneity and anisotropy of our system, low-frequency magnetic fields are generated. These fields, as well as the transverse electric fields, are analysed, and their role in the low-frequency dynamics is clarified.

TAPERED WIGGLER FREE ELECTRON LASERS DRIVEN BY NON-MONOENERGETIC ELECTRON BEAMS

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-371-C1-371 ◽  
Author(s):  
J. C. Goldstein ◽  
W. B. Colson ◽  
R. W. Warren
Keyword(s):  
Free Electron ◽  
Electron Beams ◽  
Free Electron Lasers ◽  
Monoenergetic Electron

Radiation of Charge Moving Between Two Planar Periodic Wire Structures

2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz
Keyword(s):  
Angular Distribution ◽  
Charged Particle ◽  
Research And Development ◽  
High Power ◽  
Free Electron ◽  
Radiation Intensity ◽  
Free Electron Lasers ◽  
Radiation Sources ◽  
Power Radiation ◽  
High Power Radiation

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.

Summary Discussion: Theoretical Aspects of XUV Free Electron Lasers.

1983 ◽  
Author(s):  
W. B. Colson ◽  
W. Becker ◽  
S. Benson ◽  
A. Bhowmik ◽  
R. Cover
Keyword(s):  
Free Electron ◽  
Free Electron Lasers
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