Dynamical stability of electron trajectories in a free-electron laser with quadrupole wiggler

The dynamical stability of electron trajectories of a free-electron laser with a quadrupole wiggler is studied. For this purpose, the numerical computation of Kolmogorov entropy is used. Self-electric and self-magnetic fields are taken into account, and the focusing of the beam is enhanced by an axi...

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Bibliographic Details
Published inIndian journal of physics Vol. 93; no. 10; pp. 1259 - 1264
Main Authors Hosseini, M., Salehi, E., Maraghechi, B.
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 01.10.2019
Springer Nature B.V
Subjects
Astrophysics and Astroparticles
Dynamic stability
Electron trajectories
Electrons
Free electron lasers
Magnetic fields
Magnetism
Numerical analysis
OriginalPaper
Physics
Physics and Astronomy
Quadrupoles
Free-electron laser
Quadrupole wiggler
52.20.Dq
02.60.Cb
Dynamical stability
52.59.Sa
Kolmogorov entropy
41.60.Cr
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Summary:The dynamical stability of electron trajectories of a free-electron laser with a quadrupole wiggler is studied. For this purpose, the numerical computation of Kolmogorov entropy is used. Self-electric and self-magnetic fields are taken into account, and the focusing of the beam is enhanced by an axial magnetic field. A considerable decrease in the dynamical stability of electron trajectories was found when self-fields are considered. Also, it was found that an axial magnetic field can significantly alter the regular trajectories of the electrons.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-019-01406-w