Focusing XFEL SASE pulses by rotationally parabolic refractive x-ray lenses

Focusing XFEL SASE pulses by rotationally parabolic refractive x-ray lenses
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通过旋转抛物面折射 X 射线透镜聚焦 XFEL SASE 脉冲

DOI:
10.1088/1742-6596/499/1/012004
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发表时间:
2014
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
C. G. Schroer
C. G. Schroer
中科院分区:
--
文献类型:
--
作者:
F. Seiboth;A. Schropp;R. Hoppe;V. Meier;J. Patommel;H. J. Lee;B. Nagler;E. C. Galtier;B. Arnold;U. Zastrau;J. B. Hastings;D. Nilsson;F. Uhlén;U. Vogt;H. M. Hertz;C. G. Schroer

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Using rotationally parabolic refractive x-ray lenses made of beryllium, we focus hard x-ray free-electron laser pulses of the Linac Coherent Light Source (LCLS) down to a spot size in the 100 nm range. We demonstrated efficient nanofocusing and characterized the nanofocused wave field by ptychographic imaging [A. Schropp, et al., Sci. Rep. 3, 1633 (2013)] in the case of monochromatic LCLS pulses produced by a crystal monochromator that decreases the LCLS bandwidth down to ΔE/E= 1.4· 10− 4. The full spectrum of LCLS pulses generated by self-amplified spontaneous emission (SASE), however, fluctuates and has a typical bandwidth of a few per mille (ΔE/E≈ 2· 10− 3). Due to the dispersion in the lens material, a polychromatic nanobeam generated by refractive x-ray lenses is affected by chromatic aberration. After reviewing the chromaticity of refractive x-ray lenses, we discuss the influence of increased bandwidth on the quality of a nanofocused SASE pulse.
DOI: 10.1063/1.4729942
发表时间: 2012-06-18
影响因子: 4
作者:
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DOI: 10.1364/ol.37.005046
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DOI: 10.1117/12.2024784
发表时间: 2013
期刊: --
影响因子: --
作者:
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