Generation of 10(20) W cm(-2) hard X-ray laser pulses with two-stage reflective focusing system

Hidekazu Mimura; Hirokatsu Yumoto; Satoshi Matsuyama; Takahisa Koyama; Kensuke Tono; Yuichi Inubushi; Tadashi Togashi; Takahiro Sato; Jangwoo Kim; Ryosuke Fukui; Yasuhisa Sano; Makina Yabashi; Haruhiko Ohashi; Tetsuya Ishikawa; Kazuto Yamauchi

doi:10.1038/ncomms4539

Generation of 10(20) W cm(-2) hard X-ray laser pulses with two-stage reflective focusing system

Nat Commun. 2014 Apr 30:5:3539. doi: 10.1038/ncomms4539.

Authors

Affiliations

¹ 1] Department of Precision Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan [2].
² 1] Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan [2].
³ 1] Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan [2].
⁴ Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
⁵ RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
⁶ Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
⁷ 1] Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan [2] RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.

PMID: 24781443
DOI: 10.1038/ncomms4539

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.

Publication types

Research Support, Non-U.S. Gov't