Electron trajectories in a free-electron laser with planar wiggler and ion-channel guiding

2001 ◽  
Vol 8 (8) ◽  
pp. 3776-3780 ◽  
Author(s):  
Hassan Mehdian ◽  
Mehdi Esmelzadeh ◽  
Joseph E. Willett
Keyword(s):  
Ion Channel ◽  
Free Electron ◽  
Free Electron Laser ◽  
Electron Trajectories

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.

Electron trajectories and gain in a free-electron laser with realizable helical wiggler and ion-channel guiding

2005 ◽  
Vol 12 (9) ◽  
pp. 093103 ◽  
Author(s):  
Madhi Esmaeilzadeh ◽  
Sadollah Ebrahimi ◽  
Alaeddin Saiahian ◽  
Joseph E. Willett ◽  
Lori Jo Willett
Keyword(s):  
Ion Channel ◽  
Free Electron ◽  
Free Electron Laser ◽  
Electron Trajectories

Chaotic electron trajectories in a free-electron laser with helical wiggler and ion-channel guiding

2005 ◽  
Vol 72 (03) ◽  
pp. 341 ◽  
Author(s):  
MOHAMMAD S. FALLAH ◽  
MAHDI ESMAEILZADEH ◽  
JOSEPH E. WILLETT ◽  
LORI J. WILLETT
Keyword(s):  
Ion Channel ◽  
Free Electron ◽  
Free Electron Laser ◽  
Electron Trajectories
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