scholarly journals ELECTRON TRAJECTORIES AND STABILITY IN FEL WITH AN AXIAL GUIDE MAGNETIC FIELD

1991 ◽  
Vol 40 (10) ◽  
pp. 1624
Author(s):  
SHU XIAO-JIAN
Keyword(s):  
Magnetic Field ◽  
Electron Trajectories ◽  
Guide Magnetic Field

Dispersion relation and growth rate of a relativistic electron beam propagating through a Langmuir wave wiggler

2015 ◽  
Vol 81 (3) ◽  
Author(s):  
H. Zirak ◽  
S. Jafari
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Dispersion Relation ◽  
Wave Equations ◽  
Axial Magnetic Field ◽  
Equations Of Motion ◽  
Langmuir Wave ◽  
Electron Trajectories ◽  
Runge Kutta Method ◽  
Guide Magnetic Field

In this study, a theory of free-electron laser (FEL) with a Langmuir wave wiggler in the presence of an axial magnetic field has been presented. The small wavelength of the plasma wave (in the sub-mm range) allows obtaining higher frequency than conventional wiggler FELs. Electron trajectories have been obtained by solving the equations of motion for a single electron. In addition, a fourth-order Runge–Kutta method has been used to simulate the electron trajectories. Employing a perturbation analysis, the dispersion relation for an electromagnetic and space-charge waves has been derived by solving the momentum transfer, continuity, and wave equations. Numerical calculations show that the growth rate increases with increasing the e-beam energy and e-beam density, while it decreases with increasing the strength of the axial guide magnetic field.

scholarly journals New possibilities of collectors with azimuthal magnetic field for multistage energy recovery in gyrotrons

2021 ◽  
Vol 2103 (1) ◽  
pp. 012058
Author(s):  
I Louksha ◽  
P A Trofimov ◽  
B D Usherenko
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Energy Recovery ◽  
Trajectory Analysis ◽  
Spatial Separation ◽  
Total Efficiency ◽  
Optimal Parameters ◽  
Azimuthal Magnetic Field ◽  
Electron Trajectories ◽  
Collector Region

Abstract The results of modeling a collector with 4-stage recovery of residual electron energy for the SPbPU gyrotron with a frequency of 74.2 GHz and an output power of 100 kW are presented. For spatial separation of electrons with different energies, an azimuthal magnetic field created by a toroidal solenoid is used. An increase of the recovery efficiency and a decrease of the current of electrons reflected from the collector is achieved by reducing the spread of the radial position of the leading centers of electron trajectories at optimal parameters of the toroidal solenoid, as well as by using a sectioned electron beam. The trajectory analysis of the spent electron beam in the collector region showed the possibility of achieving the total efficiency of the gyrotron, close to 80%.

The Research of Relationship between Storage Lifetime of Two Orthogonal Polarization and Guide Magnetic Field

2015 ◽  
Vol 21 (3) ◽  
pp. 210-215
Author(s):  
李萍 LI Ping ◽  
徐忠孝 XU Zhong-xiao ◽  
陈力荣 CHEN Li-rong ◽  
温亚飞 WEN Ya-fei ◽  
曾炜卿 ZENG Wei-qing ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Orthogonal Polarization ◽  
Guide Magnetic Field
Sign in / Sign up

Export Citation Format

Share Document