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Journal Article

Temporally-coherent terawatt attosecond XFEL synchronized with a few cycle laser


Landsman,  Alexandra
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Kumar, S., Parc, Y. W., Landsman, A., & Kim, D. E. (2016). Temporally-coherent terawatt attosecond XFEL synchronized with a few cycle laser. Scientific Reports, 6: 37700. doi:10.1038/srep37700.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-598D-1
Attosecond metrology using laser-based high-order harmonics has been significantly advanced and applied to various studies of electron dynamics in atoms, molecules and solids. Laser-based high-order harmonics have a limitation of low power and photon energies. There is, however, a great demand for even higher power and photon energy. Here, we propose a scheme for a terawatt attosecond (TW-as) X-ray pulse in X-ray free-electron laser controlled by a few cycle IR pulse, where one dominant current spike in an electron bunch is used repeatedly to amplify a seeded radiation to a terawatt level. This scheme is relatively simple, compact, straightforward, and also produces a temporally and spectrally clean pulse. The viability of this scheme is demonstrated in simulations using Pohang accelerator laboratory (PAL)-XFEL beam parameters.