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Femtosecond soft X-ray absorption spectroscopy of warm dense matter at the PAL-XFEL

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Title
Femtosecond soft X-ray absorption spectroscopy of warm dense matter at the PAL-XFEL
Author(s)
Jong-Won Lee; Gyeongbo Kang; Kim, Minju; Kim, Minseok; Park, Sang Han; Kwon, Soonnam; Seonghyeok Yang; Cho, Byoung-Ick
Publication Date
2020-07
Journal
Journal of Synchrotron Radiation, v.27, pp.953 - 958
Publisher
Blackwell Publishing Inc.
Abstract
Free-electron laser pulse-based X-ray absorption spectroscopy measurements on warm dense copper are presented. The incident X-ray pulse energies were measured with a detector assembly consisting of a photocathode membrane and microchannel plates, and the transmitted energies were measured simultaneously with a photodiode detector. The precision of the absorption measurements was evaluated. For a warm dense copper foil irradiated by an intense femtosecond laser pulse, the enhanced X-ray absorption below the L-3-edge, followed by the rapid evolution of highly excited Fermi liquid within a picosecond, were successfully measured. This result demonstrates a unique capability to study femtosecond non-equilibrium electron-hole dynamics in extreme states of matter.
URI
https://pr.ibs.re.kr/handle/8788114/9740
DOI
10.1107/S160057752000524X
ISSN
0909-0495
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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