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For the generation of an intense isolated pulse in hard X-ray region using X-ray free electron laser

Published online by Cambridge University Press:  07 June 2012

Sandeep Kumar ,
Heung-Sik Kang  and
Dong-Eon Kim
Sandeep Kumar
Affiliation:
Department of Physics, Center for Attosecond Science and Technology, Pohang University of Science and Technology, Pohang, Kyungbuk, South Korea Pohang Accelerator Laboratory, Pohang, Kyungbuk, South Korea
Heung-Sik Kang
Affiliation:
Pohang Accelerator Laboratory, Pohang, Kyungbuk, South Korea
Dong-Eon Kim*
Affiliation:
Department of Physics, Center for Attosecond Science and Technology, Pohang University of Science and Technology, Pohang, Kyungbuk, South Korea Max Planck Center for Attosecond Science, Pohang, Kyungbuk, South Korea
*
Address correspondence and reprint requests to: Dong-Eon Kim, Department of Physics, Center for Attosecond Science and Technology, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang, Kyungbuk, 790-784, South Korea. E-mail: kimd@postech.ac.kr
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Abstract

For a real, meaningful pump-probe experiment with attosecond temporal resolution, an intense isolated attosecond pulse is in demand. For that purpose we report the generation of an intense isolated attosecond pulse, especially in X-ray region using a current-enhanced self-amplified spontaneous emission in a free electron laser (FEL). We use a few cycle laser pulse to manipulate the electron-bunch inside a two-period planar wiggler. In our study, we employ the electron beam parameters of Pohang Accelerator Laboratory (PAL)-XFEL. The RF phase effect of accelerator columns on the longitudinal energy distribution profile and current profile of electron-bunch is also studied, aiming that these results can be experimentally realized in PAL-XFEL. We show indeed that the manipulation of electron-energy bunch profile may lead to the generation of an isolated attosecond hard X-ray pulse: 150 attosecond radiation pulse at 0.1 nm wavelength can be generated.

Keywords

Beam energy modulationCurrent enhanced SASE free electron laserFemtosecond laserHard X-ray pulse generationUndulator radiation
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 3 , September 2012 , pp. 397 - 406
Copyright
Copyright © Cambridge University Press 2012

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