A compact X-ray free-electron laser emitting in the sub-angstrom region
A compact X-ray free-electron laser emitting in the sub-angstrom region
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DOI：
10.1038/nphoton.2012.141
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发表时间：
2012-08-01
期刊：
影响因子：
35
通讯作者：
Kumagai, Noritaka
中科院分区：
文献类型：
--
作者：
Ishikawa, Tetsuya;Aoyagi, Hideki;Kumagai, Noritaka
由Madey(1)于1971年首次提出的自由电子激光器，将激光波长大大缩短到真空紫外（2,3）和软x射线区域(4)。最近，一个x射线自由电子激光器（XFEL）在直线相干光源（LCLS）的1.2埃工作(5)。在这里，我们报告了使用紧凑的XFEL光源，结合短周期波动器和8 geve电子束成功产生亚埃激光。获得的最短波长为0.634埃（63.4 pm），比梅曼的第一个激光器产生的694 nm小4个数量级(6)。最大功率超过10gw，脉冲持续时间为10(-14)s。这一成就将有助于XFEL源的广泛使用，并为探索新的科学领域提供广泛的机会。
The free-electron laser, first proposed by Madey(1) in 1971, has significantly reduced laser wavelengths to the vacuum ultraviolet(2,3) and soft X-ray regions(4). Recently, an X-ray free-electron laser (XFEL) was operated at 1.2 angstrom at the Linac Coherent Light Source (LCLS)(5). Here, we report the successful generation of sub-angstrom laser light using a compact XFEL source, combining a short-period undulator with an 8 GeVelectron beam. The shortest wavelength attained-0.634 angstrom (63.4 pm)-is four orders of magnitude smaller than the 694 nm generated by Maiman's first laser(6). The maximum power exceeded 10 GW with a pulse duration of 10(-14) s. This achievement will contribute to the widespread use of XFEL sources and provide broad opportunities for exploring new fields in science.