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25 January 2001 Femtosecond x-ray dynamical diffraction by perfect crystals
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X-ray free-electron lasers (XFELs) designed to operate at approximately 1A wavelengths are currently being proposed by several laboratories as the basis for the next (4th) generation of synchrotron radiation sources. The unique radiation properties of these proposed sources, which include 200 fs pulse duration and peak beam brilliance in excess of 1033 photon (2 .1%-bw mrad2 mm2), offer the possibility of ultrafast time-resolved experiments, perhaps down to 10- fs resolution levels using pulse compression or slicing techniques. Motivated by such potential applications, this paper addresses the relevant instrumentation issue of perfect crystal dynamical diffraction of ultrashort x-ray pulses when the pulse lengths become comparable to the extinction length scales. The basic calculations reported here show the transient time-dependent diffraction from perfect crystals excited by plane-wave delta-function electromagentic impulses. Time responses have been calculated for 8 keV photon energy, for reflected and transmitted beams in both Bragg and Laue cases. Interesting diffraction effects arise, and their implications for XFEL optics are discussed.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sarvjit D. Shastri, Pedro Zambianchi, and Dennis M. Mills "Femtosecond x-ray dynamical diffraction by perfect crystals", Proc. SPIE 4143, X-Ray FEL Optics and Instrumentation, (25 January 2001);

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