scholarly journals Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers

2015 ◽  
Vol 18 (6) ◽  
Author(s):  
Guanglei Wang ◽  
Weiqing Zhang ◽  
Guorong Wu ◽  
Dongxu Dai ◽  
Xueming Yang ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Free Electron ◽  
Beam Energy ◽  
Free Electron Lasers ◽  
Density Modulation

scholarly journals Switching of the harmonic order in free-electron lasers by controlling the density modulation of an electron bunch

2018 ◽  
Vol 25 (5) ◽  
pp. 1317-1322 ◽  
Author(s):  
Norihiro Sei ◽  
Hiroshi Ogawa ◽  
QiKa Jia
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Free Electron Lasers ◽  
Harmonic Order ◽  
Third Harmonic ◽  
X Ray ◽  
The Third ◽  
Density Modulation ◽  
Higher Harmonic

It was demonstrated that harmonic order in free-electron laser (FEL) oscillations could be switched by adjusting the dispersive gap of the optical klystron ETLOK-III in the storage ring NIJI-IV. The effective gains for the fundamental and third-harmonic FEL oscillations were evaluated and it was confirmed that the FEL oscillated at the order of the harmonic with the higher effective gain. The ratio between the effective gain for the fundamental and that for the third harmonic was controlled by the dispersive gap. It was also demonstrated that a spectral measurement of the FEL-based Compton scattering X-ray beam was effective for directly observing the switching of the harmonic order. These results contribute to the development of higher-harmonic FEL oscillations suppressing the fundamental FEL oscillation in the extreme ultraviolet and X-ray regions.

Linac-based free electron lasers and e-beam energy modulation

1999 ◽  
Vol 70 (2) ◽  
pp. 1355-1358 ◽  
Author(s):  
U. Bizzarri ◽  
G. Dattoli ◽  
P. L. Ottaviani
Keyword(s):  
Free Electron ◽  
Beam Energy ◽  
Free Electron Lasers ◽  
Energy Modulation

TAPERED WIGGLER FREE ELECTRON LASERS DRIVEN BY NON-MONOENERGETIC ELECTRON BEAMS

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-371-C1-371 ◽  
Author(s):  
J. C. Goldstein ◽  
W. B. Colson ◽  
R. W. Warren
Keyword(s):  
Free Electron ◽  
Electron Beams ◽  
Free Electron Lasers ◽  
Monoenergetic Electron

Radiation of Charge Moving Between Two Planar Periodic Wire Structures

2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz
Keyword(s):  
Angular Distribution ◽  
Charged Particle ◽  
Research And Development ◽  
High Power ◽  
Free Electron ◽  
Radiation Intensity ◽  
Free Electron Lasers ◽  
Radiation Sources ◽  
Power Radiation ◽  
High Power Radiation

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.

Summary Discussion: Theoretical Aspects of XUV Free Electron Lasers.

1983 ◽  
Author(s):  
W. B. Colson ◽  
W. Becker ◽  
S. Benson ◽  
A. Bhowmik ◽  
R. Cover
Keyword(s):  
Free Electron ◽  
Free Electron Lasers
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