Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser
SCIE
SCOPUS
- Title
- Terawatt-Isolated Attosecond X-ray Pulse Using a Tapered X-ray Free Electron Laser
- Authors
- Kumar, Sandeep; Landsman, Alexandra S.; Kim, Dong Eon
- Date Issued
- 2017-06
- Publisher
- MDPI AG
- Abstract
- High power attosecond (as) X-ray pulses are in great demand for ultrafast dynamics and high resolution microscopy. We numerically demonstrate the generation of a similar to 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.
- Keywords
- FEL; GENERATION; RADIATION; SCHEME
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92084
- DOI
- 10.3390/app7060614
- ISSN
- 2076-3417
- Article Type
- Article
- Citation
- APPLIED SCIENCES-BASEL, vol. 7, no. 6, 2017-06
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