Abstract
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.
Highlights
Modulation, where only one current spike is dominant, the alignment of the current spike with the seed radiation is easier compared to the case of many current-spikes
The current spike is well synchronized with the driving laser and produces an X-ray pulse which is synchronized with the driving few cycle pulse
The current profile contains a few current spikes, the number of which can be varied depending on a laser wavelength, a laser pulse duration and the energy spectrum of an electron beam[22]
Summary
Modulation, where only one current spike is dominant, the alignment of the current spike with the seed radiation is easier compared to the case of many current-spikes. Due to high-current at the main electron spike, stronger radiation amplification is achieved in a shorter length of an undulator.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
