Indirect estimations of energy and energy spread for a compact free electron laser-terahertz pre-injector using RF measuring parameters

2021 ◽  
Vol 1016 ◽  
pp. 165775
Author(s):  
T.N. Hu ◽  
J.Y. Li ◽  
Y.J. Pei ◽  
G.Y. Feng ◽  
H.J. Xu ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Energy Spread

scholarly journals Two-frequency undulator usage in compact self-amplified spontaneous emission free electron laser in Roentgen range

2017 ◽  
Vol 35 (2) ◽  
pp. 326-336 ◽  
Author(s):  
K. Zhukovsky ◽  
I. Potapov
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Free Electron Laser ◽  
High Harmonic ◽  
Amplified Spontaneous Emission ◽  
Energy Spread ◽  
X Ray ◽  
Sase Fel ◽  
Generation Of Harmonics ◽  
Harmonic Power

AbstractThe generation of harmonics in two-frequency undulator in a self-amplified spontaneous emission free electron laser (SASE FEL) is studied in order to produce Roentgen radiation in a relatively compact sized installation. The dynamics of SASE FEL is analyzed with the help of the phenomenological model to obtain the maximum of the X-ray high-harmonic power. The model accounts for the properties of the undulator magnetic field and of the electron beam and includes the major sources of losses, such as the electron energy spread, etc. It is compared and calibrated with the existing data on a FEL experiment. The advantages of the two-frequency undulator for Roentgen SASE FEL are demonstrated and the possibility to generate powerful mild Roentgen radiation at already ~25 m length is shown. The evolution of the bunching coefficients for high harmonics is studied together with the evolution of the FEL-induced energy spread. The linear and non-linear regimes are explored for common and for two-frequency undulators The usage of the two-frequency undulator for cascade SASE FEL with high X-ray harmonic power and high-harmonic bunching coefficients with low-induced energy spread is proposed.

scholarly journals Compensation of thermal loss in free-electron laser with optimal tapering and pre-bunching

2020 ◽  
Vol 38 (2) ◽  
pp. 141-147
Author(s):  
F. Bazouband
Keyword(s):  
Electron Beam ◽  
Free Electron ◽  
Free Electron Laser ◽  
Nonlinear Differential Equations ◽  
Three Dimensional ◽  
Energy Spread ◽  
Thermal Electron ◽  
Simulation Code ◽  
Runge Kutta Method ◽  
Saturation Power

AbstractIncreasing the output power of a long-wavelength free-electron laser (FEL), despite the destroying effects of beam energy spread, is studied using the optimal pre-bunching of the thermal electron beam along with the optimal tapering of the planar wiggler magnetic field. A set of self-consistent coupled nonlinear differential equations in three dimensional that describe the evolution of radiation and electron beam in the interaction zone are solved numerically by the Runge–Kutta method. The axial energy spread is considered and it degrades the FEL performance by reducing the saturation power and increasing the saturation length. To compensate these destroying effects, the optimum function or degree of electron beam pre-bunching and optimum parameters of wiggler tapering are found by the successive runs of the simulation code.

A low-energy-spread rf accelerator for a far-infrared free electron laser

1993 ◽  
Vol 334 (2-3) ◽  
pp. 607-616 ◽  
Author(s):  
C.A.J. van der Geer ◽  
R.J. Bakker ◽  
A.F.G. van der Meer ◽  
P.W. van Amersfoort ◽  
W.A. Gillespie ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Far Infrared ◽  
Low Energy ◽  
Energy Spread

A free-electron laser with enhanced energy spread acceptance

1985 ◽  
Vol 21 (5) ◽  
pp. 470-476 ◽  
Author(s):  
L. Grover ◽  
J. Feinstein ◽  
R. Pantell
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Energy Spread
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