Nonlinear analysis of the efficiency and saturation length of free electron laser with realistic helical wiggler and ion-channel guiding

被引：0
作者：
Golshad Kheiri
机构：
[1] Urmia University,Department of Physics, Faculty of Science
来源：
Optical and Quantum Electronics | 2022年 / 54卷
关键词：
Free electron laser; Nonlinear; Efficiency; Power; Saturation;
D O I：
暂无
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摘要：
A nonlinear study of the efficiency, power, and the saturation length of a free-electron laser with realistic helical wiggler and ion-channel guiding using numerical simulation is presented. A set of coupled nonlinear differential equations is derived using the Lorentz force equation for the ensemble of electrons and Maxwell’s equations for radiation waves. To calculate the efficiency, power, and the saturation length of the amplifier, these equations are solved simultaneously using a code developed in this study. By choosing different values of the plasma frequency of ion-channel guiding, the dominant mode for the group I and group II orbits is found. The effect of ion-channel guiding on efficiency and saturation length was studied, and the results show that ion-channel guiding increases efficiency and reduces saturation length. Moreover, the efficiency increases, and the saturation length decrease when the annular electron beam is substituted for a solid electron beam. Finally, the results show that the efficiency of a realistic wiggler free-electron laser is higher than that of an idealized one, while the saturation length is lower.
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共 94 条
[1]  
Chang SF(1988)Analysis and nonlinear simulation of a FEL at millimeter wavelengths IEEE J. Quantum Electron. 24 2308-2320
[2]  
Eldridge OC(1981)Electron orbits and stability in realizable and unrealizable wigglers of free-electron lasers Phys. Rev. A 23 2537-2552
[3]  
Scharer JE(2002)Gain equation for a free-electron laser with a helical wiggler and ion-channel guiding Phys. Rev. E 65 016501-16506
[4]  
Diament P(2003)Self-fields in a free-electron laser with helical wiggler and ion-channel guiding Phys. Plasmas 10 905-907
[5]  
Esmaeilzadeh M(2004)Electron trajectories in a free-electron laser with helical wiggler, ion-channel guiding, and parallel/reversed axial magnetic field J. Plasma Phys. 70 9-24
[6]  
Mehdian H(2005)Electron trajectories and gain in a free-electron laser with realizable helical wiggler and ion-channel guiding Phys. Plasmas 12 093103-93107
[7]  
Willett JE(2006)Self-fields in a free-electron laser with helical wiggler and axial magnetic field J. Plasma Phys. 72 59-69
[8]  
Esmaeilzadeh M(1985)Off-axis electron orbits in realistic helical wigglers for free-electron-laser applications Phys. Rev. A 32 3448-3453
[9]  
Mehdian H(2020)Nonlinear theory of a Cherenkov free-electron laser Nucl. Instrum. Methods Phys. 976 164256-164257
[10]  
Willett JE(1983)Nonlinear analysis of free-electron-laser amplifiers with axial guide fields Phys. Rev. A 27 1977-1988
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