scholarly journals Comment on “Application of Kolmogorov entropy to the self-amplified spontaneous emission free-electron lasers” [Phys. Plasmas 11, 1663 (2004)]

2010 ◽  
Vol 17 (8) ◽  
pp. 084701 ◽  
Author(s):  
B. Maraghechi ◽  
Elham Salehi
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Amplified Spontaneous Emission ◽  
The Self ◽  
Kolmogorov Entropy ◽  
Free Electron Lasers

scholarly journals A simple and compact scheme to enhance the brightness of self-amplified spontaneous emission free-electron-lasers

2019 ◽  
Vol 26 (4) ◽  
pp. 1085-1091 ◽  
Author(s):  
Eduard Prat ◽  
Sven Reiche
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Amplified Spontaneous Emission ◽  
Temporal Coherence ◽  
Compact Scheme ◽  
Free Electron Lasers ◽  
High Brightness

A simple and compact scheme that enhances the brightness of self-amplified spontaneous-emission (SASE) free-electron lasers is presented. The method combines the high-brightness SASE scheme and the optical klystron concept to increase the temporal coherence of the produced radiation and to reduce the required length of the undulator beamline at the same time. The scheme is very simple and only requires compact chicanes between the modules of the undulator beamline. Simulations show that, in comparison with SASE, the brightness can be improved by up to a factor of ten and the required length to achieve saturation can be reduced by 20% or more.

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