Speaker
Description
Terawatt x-ray free-electron lasers (XFELs) represent the frontier in further development of x-ray sources and require high current densities with strong transverse focusing. In this paper, we investigate the implications/potentialities of TW XFELs on the generation of variable polarization states. The simulations indicate that significant power levels are possible with polarizations ranging from planar to circular and at high harmonics of the XFEL resonance across this range of polarizations. These XFELs can be an important coherent source of hard x-rays through the gamma ray spectrum. For this purpose, we use the MINERVA simulation code. Simulations indicate that, for the parameters under consideration, peak powers of the order 1 TW at the fundamental are possible over the entire range of polarizations.
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