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Coherence and wavefront characterization of Si-111 monochromators using double-grating interferometry

Diaz, Ana ; Mocuta, Cristian ; Stangl, Julian ; Keplinger, Mario ; Weitkamp, Timm ; Pfeiffer, Franz ; David, Christian ; Metzger, Till H. ; Bauer, Günther

Journal of synchrotron radiation, 2010-05, Vol.17 (3), p.299-307 [Periódico revisado por pares]

5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography

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  • Título:
    Coherence and wavefront characterization of Si-111 monochromators using double-grating interferometry
  • Autor: Diaz, Ana ; Mocuta, Cristian ; Stangl, Julian ; Keplinger, Mario ; Weitkamp, Timm ; Pfeiffer, Franz ; David, Christian ; Metzger, Till H. ; Bauer, Günther
  • Assuntos: Beams (radiation) ; Coherence ; Diffraction ; Distortion ; interferometry ; Monochromators ; Synchrotron radiation ; Synchrotrons ; wavefront characterization ; Wavefronts ; X-rays
  • É parte de: Journal of synchrotron radiation, 2010-05, Vol.17 (3), p.299-307
  • Notas: istex:A0DDB5D171C831AD9BE9F005ABFA940CF1F58D67
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  • Descrição: A study of the coherence and wavefront properties of a pseudo‐channel‐cut monochromator in comparison with a double‐crystal monochromator is presented. Using a double‐grating interferometer designed for the hard X‐ray regime, the complex coherence factor was measured and the wavefront distortions at the sample position were analyzed. A transverse coherence length was found in the vertical direction that was a factor of two larger for the channel‐cut monochromator owing to its higher mechanical stability. The wavefront distortions after different optical elements in the beam, such as monochromators and mirrors, were also quantified. This work is particularly relevant for coherent diffraction imaging experiments with synchrotron sources.
  • Editor: 5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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