Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser
AbstractHigh power attosecond (as) X-ray pulses are in great demand for ultrafast dynamics and high resolution microscopy. We numerically demonstrate the generation of a ~230 attosecond, 1.5 terawatt (TW) pulse at a photon energy of 1 keV, and a 115 attosecond, 1.2 TW pulse at a photon energy of 12.4 keV, using the realistic electron beam parameters such as those of Korean X-ray free electron laser (XFEL) in a tapered undulator configuration. To compensate the energy loss of the electron beam and maximize its radiation power, a tapering is introduced in the downstream section of the undulator. It is found that the tapering helps in not only amplifying a target radiation pulse but also suppressing the growth of satellite radiation pulses. Tapering allows one to achieve a terawatt-attosecond pulse only with a 60 m long undulator. Such an attosecond X-ray pulse is inherently synchronized to a driving optical laser pulse; hence, it is well suited for the pump-probe experiments for studying the electron dynamics in atoms, molecules, and solids on the attosecond time-scale. For the realization of these experiments, a high level of synchronization up to attosecond precision between optical laser and X-ray pulse is demanded, which can be possible by using an interferometric feedback loop. View Full-Text
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Kumar, S.; Landsman, A.S.; Kim, D.E. Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser. Appl. Sci. 2017, 7, 614.
Kumar S, Landsman AS, Kim DE. Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser. Applied Sciences. 2017; 7(6):614.Chicago/Turabian Style
Kumar, Sandeep; Landsman, Alexandra S.; Kim, Dong E. 2017. "Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser." Appl. Sci. 7, no. 6: 614.
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