| Literature DB >> 24781443 |
Hidekazu Mimura1, Hirokatsu Yumoto2, Satoshi Matsuyama3, Takahisa Koyama4, Kensuke Tono4, Yuichi Inubushi5, Tadashi Togashi4, Takahiro Sato5, Jangwoo Kim6, Ryosuke Fukui6, Yasuhisa Sano6, Makina Yabashi5, Haruhiko Ohashi7, Tetsuya Ishikawa5, Kazuto Yamauchi6.
Abstract
Intense X-ray fields produced with hard X-ray free-electron laser (XFEL) have made possible the study of nonlinear X-ray phenomena. However, the observable phenomena are still limited by the power density. Here, we present a two-stage focusing system consisting of ultra-precise mirrors, which can generate an extremely intense X-ray field. The XFEL beam, enlarged with upstream optics, is focused with downstream optics that have high numerical aperture. A grating interferometer is used to monitor the wavefront to achieve optimum focusing. Finally, we generate an extremely small spot of 30 × 55 nm with an extraordinary power density of over 1 × 10(20) W cm(-2) using 9.9 keV XFEL light. The achieved power density provides novel opportunities to elucidate unexplored nonlinear phenomena in the X-ray region, which will advance development on quantum X-ray optics, astronomical physics and high-energy density science.Year: 2014 PMID： 24781443 DOI： 10.1038/ncomms4539
Source DB: PubMed Journal: Nat Commun ISSN： 2041-1723 Impact factor: 14.919