Coherent dynamics of a free-electron laser with arbitrary magnet geometry. II. Conservation laws, small-signal theory, and gain-spread relations

1980 ◽  
Vol 21 (6) ◽  
pp. 2009-2019 ◽  
Author(s):  
Rodolfo Bonifacio ◽  
Pierre Meystre ◽  
Gerald T. Moore ◽  
Marlan O. Scully
Keyword(s):  
Conservation Laws ◽  
Free Electron ◽  
Free Electron Laser ◽  
Signal Theory ◽  
Small Signal ◽  
Coherent Dynamics

Comparison of self-fields effects in two-stream electromagnetically pumped FEL with ion-channel guiding and axial magnetic field

2011 ◽  
Vol 77 (6) ◽  
pp. 765-776 ◽  
Author(s):  
S. SAVIZ ◽  
H. MEHDIAN ◽  
FARZIN M. AGHAMIR ◽  
M. GHORANNEVIS ◽  
A. A. ASHKARRAN
Keyword(s):  
Magnetic Field ◽  
Ion Channel ◽  
Free Electron ◽  
Free Electron Laser ◽  
Axial Magnetic Field ◽  
Small Region ◽  
Numerical Calculations ◽  
Small Signal Gain ◽  
Small Signal ◽  
Electron Trajectories

AbstractA theory of two-stream free-electron laser in a combined electromagnetic wiggler and an ion-channel guiding is developed. In the analysis, the electron trajectories and the small signal gain are derived by considering the effects of self-fields. Numerical calculations show that there are seven group's trajectories rather than nine groups reported in Mehdian and Saviz (2010 Chin. Phys. B 19(1), 014214). The comparison of the normalized gains and their corresponding normalized frequencies by employing the axial magnetic field and ion-channel guiding, with and without self-fields, in FEL has been studied numerically. The results show that the normalized maximum gain in FEL with axial magnetic is larger than that for using ion-channel guiding except in small region, but the results for their corresponding normalized frequencies are opposite.

Strong-Signal Theory of a Free-Electron Laser.

1977 ◽  
Vol 39 (23) ◽  
pp. 1496-1496 ◽  
Author(s):  
F. A. Hopf ◽  
P. Meystre ◽  
M. O. Scully ◽  
W. H. Louisell
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Signal Theory ◽  
Strong Signal
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