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

Autor:	Gyeongbo Kang, Jong Won Lee, Sang Han Park, Minseok Kim, Soonnam Kwon, Seonghyeok Yang, Byoung-ick Cho, Minju Kim
Rok vydání:	2020
Předmět:	Nuclear and High Energy Physics X-ray absorption spectroscopy Radiation Materials science Absorption spectroscopy Physics::Instrumentation and Detectors business.industry 02 engineering and technology Warm dense matter 021001 nanoscience & nanotechnology Laser 01 natural sciences Photocathode law.invention Optics law 0103 physical sciences Femtosecond State of matter 010306 general physics 0210 nano-technology Absorption (electromagnetic radiation) business Instrumentation
Zdroj:	Journal of Synchrotron Radiation. 27:953-958
ISSN:	1600-5775
DOI:	10.1107/s160057752000524x
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a049e415061880eef497150fd9a2437 https://doi.org/10.1107/s160057752000524x Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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