期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep37700
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资金
- Global Research Laboratory Program [2009-00439]
- Max Planck POSTECH/KOREA Research Initiative Program through National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2016K1A4A4A01922028]
- Nuclear Research Foundation of Korea (NRF) grant - Korea government (MEST) [2012027506]
- Max Planck Center for Attosecond Science (MPC-AS)
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.
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