Nonlinear study of free-electron laser pumped by electromagnetic-wave wiggler with an axial guide magnetic field

1998 ◽  
pp. II-120-II-121
Author(s):  
Li Wang ◽  
Shi-Chang Zhang
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Free Electron ◽  
Free Electron Laser ◽  
Guide Magnetic Field

A comparison between electron orbits for both an axial magnetic field and an ion-channel guiding in a FEL with an electromagnetic wave wiggler

2008 ◽  
Vol 74 (2) ◽  
pp. 187-196 ◽  
Author(s):  
H. MEHDIAN ◽  
S. JAFARI
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Ion Channel ◽  
Free Electron ◽  
Free Electron Laser ◽  
Large Amplitude ◽  
Electromagnetic Waves ◽  
Axial Magnetic Field ◽  
Numerical Study ◽  
Guide Magnetic Field

AbstractThe operation of a free-electron laser (FEL) with electromagnetic wave wiggler in the presence of an ion-channel guiding as well as an axial guide magnetic field is considered and compared. Theoretical studies of electron trajectories and dispersion relations in a combined ion electrostatic field as well as large-amplitude backward-propagating electromagnetic waves are analyzed. The large-amplitude wave acts like a magnetostatic wiggler in a FEL. The results of a numerical study are presented and discussed. It is shown that in the wiggler pumped ion-channel free-electron laser (WPIC-FEL), electron orbits and dispersion relation are time-dependent, and over time, electron orbits while oscillating bear a periodic motion.

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