United energy theory for free-electron lasers with different magnetic field structures

1993 ◽  
Vol 32 (1) ◽  
pp. 46
Author(s):  
Runwen Wang
Keyword(s):  
Magnetic Field ◽  
Free Electron ◽  
Free Electron Lasers ◽  
Energy Theory

Self-field effects on electron dynamics in free-electron lasers with axial magnetic field

2004 ◽  
Vol 11 (10) ◽  
pp. 4777-4783 ◽  
Author(s):  
S. Mirzanejhad ◽  
B. Maraghechi ◽  
T. Mohsenpour
Keyword(s):  
Magnetic Field ◽  
Free Electron ◽  
Axial Magnetic Field ◽  
Free Electron Lasers ◽  
Electron Dynamics ◽  
Field Effects

Simulation of free-electron lasers in the presence of correlated magnetic field errors

1991 ◽  
Vol 27 (12) ◽  
pp. 2693-2696 ◽  
Author(s):  
W.P. Marable ◽  
C.-M. Tang ◽  
E. Esarey
Keyword(s):  
Magnetic Field ◽  
Free Electron ◽  
Free Electron Lasers ◽  
Field Errors

scholarly journals Theory of terahertz Smith-Purcell radiation from a cylindrical grating

2019 ◽  
Vol 11 ◽  
pp. 110007
Author(s):  
Z. Rezaei ◽  
B. Farokhi
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Electron Beam ◽  
Dispersion Relation ◽  
External Magnetic Field ◽  
Free Electron ◽  
Free Electron Lasers ◽  
Annular Electron Beam ◽  
High Efficient ◽  
Beam Thickness

An analysis of an annular electron beam propagating along a cylindrical grating with external magnetic field Bo is presented. The grating comprises a dielectric in its slots. The dispersion relation of the modes is derived. The results demonstrate that the dielectric shifts the frequencies of the system modes to smaller values. The growth rates of the modes which are in phase with the beam are also considered. It is found that the decline in the growth rate is brought about by the dielectric. In addition, increasing the thickness of the dielectric and decreasing the height of the slots cause it to rise. The effect of beam thickness on growth rate is considered too. This is shown to increase and then fall as beam thickness increases. These results show that utilizing cylindrical grating loaded with dielectric has a promising effect on developing new kinds of compact high-efficient THz free-electron lasers based on Smith–Purcell radiation. Edited by: A. B. Márquez

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