Optical klystron configuration for a high gain x-ray free-electron laser

1990 ◽  
Vol 77 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Juan C. Gallardo ◽  
Claudio Pellegrini
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
High Gain ◽  
X Ray

scholarly journals Increased gain of the lateral-injection free-electron laser and the use of clusters for amplication in the X-ray range

1986 ◽  
Vol 4 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Heinrich Hora ◽  
Jin-Cheng Wang ◽  
P. J. Clark ◽  
R. J. Stening
Keyword(s):  
Laser Pulse ◽  
Free Electron ◽  
Free Electron Laser ◽  
High Efficiency ◽  
High Gain ◽  
Difficult Problem ◽  
Solid Particles ◽  
Laser Amplifier ◽  
Plasma Properties ◽  
X Ray

Using radial plasma acceleration in a laser beam, an alternative type of free electron laser has been developed by radial injection of electrons. Its properties have been elaborated for a laser amplifier of 400 μtm wavelength. To overcome the difficulties of this FEL, a basically new laser amplifier concept has been developed where a laser pulse is amplified by nearly lateral injection of solid particles (clusters, pellets etc.) whose kinetic energy (at appropriate adjustment and synchronisation) is converted into 80% optical energy of the laser pulse. The mechanism of energy transfer is the radial slowing down by nonlinear ponderomotive forces of the plasma made from the cluster reaching the beam axis, and the switching-off process of the beam with regard to the transient nonlinear force processes. It is an inversion of the plasma ejection with ponderomotive self-focussing. Apart from the unusually high efficiency, a relatively high gain is expected even for such small laser wavelengths as 10 nm. Furthermore, the difficult problem of modification of phase fronts and convergence (focussing, directing of X-ray beams) should be solved by the optical plasma properties at injection.

scholarly journals A Review of High-Gain Free-Electron Laser Theory

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 28
Author(s):  
Nicola Piovella ◽  
Luca Volpe
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Free Electron Laser ◽  
Amplified Spontaneous Emission ◽  
High Gain ◽  
Free Electron Lasers ◽  
Undulator Radiation ◽  
Laser Theory ◽  
X Ray ◽  
Single Pass

High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright sources of coherent X-ray radiation available. In this article, we review the theory developed by R. Bonifacio and coworkers, who have been some of the first scientists envisaging its operation as a single-pass amplifier starting from incoherent undulator radiation, in the so called self-amplified spontaneous emission (SASE) regime. We review the FEL theory, discussing how the FEL parameters emerge from it, which are fundamental for describing, designing and understanding all FEL experiments in the high-gain, single-pass operation.

High-gain X-ray free electron laser by beat-wave terahertz undulator

2013 ◽  
Vol 20 (12) ◽  
pp. 123110 ◽  
Author(s):  
Chao Chang ◽  
DongWei Hei ◽  
Claudio Pellegrin ◽  
Sami Tantawi
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
High Gain ◽  
X Ray
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