Long and compact x-ray pathway for experiments requiring high coherent x-ray beams

Hönnicke, Marcelo Gonçalves; Kakuno, Edson Massayuki; Kellerman, G.; Mazzaro, I.; Abler, Daniel; Cusatis, C.

doi:10.1364/oe.16.009284

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…XBD can also be employed for building ultra-high-energy-resolution X-ray mono-chromators and analyzers for inelastic X-ray scattering (IXS) involving different types of single crystals (Cai et al, 2004;Sutter et al, 2005Sutter et al, , 2006Hill et al, 2007;Sergueev et al, 2011;Hö nnicke, Huang et al, 2013) and/or exotic geometries (Shvyd'ko et al, 2006;Huang, 2011;Stetsko et al, 2011;Stoupin et al, 2013). Other applications range from Fabry-Perrot X-ray interferometers (Shvydko et al, 2003;Chang et al, 2005;Huang et al, 2012) to imaging applications (Hö nnicke et al, 2008;Honnicke & Cusatis, 2009;Huotari et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Exotic X-ray back-diffraction: a path toward a soft inelastic X-ray scattering spectrometer

et al. 2014

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In this work, soft X‐ray back‐diffraction (XBD; X‐ray diffraction at angles near and exactly equal to 90°) is explored. The experiment was conducted at the SXS beamline at Laboratorio Nacional de Luz Sincrotron, Brazil, at ∼3.2 keV. A high‐resolution Si(220) multi‐bounce back‐diffraction monochromator was designed and constructed for this experiment. An ultra‐thin Si(220) crystal (5 µm thick) was used as the sample. This ultra‐thin crystal was characterized by profilometry, rocking‐curve measurements and X‐ray topography prior to the XBD measurements. It is shown that the measured forward‐diffracted beam (o‐beam) profiles, taken at different temperatures, are in close agreement with profiles predicted by the extended dynamical theory of X‐ray diffraction, with the absence of multiple‐beam diffraction (MBD). This is an important result for future studies on the basic properties of back‐diffracted X‐ray beams at energies slightly above the exact XBD condition (extreme condition where XBD is almost extinguished). Also, the results presented here indicate that stressed crystals behave like ideal strain‐free crystals when used for low‐energy XBD. This is mainly due to the large widths of XBD profiles, which lead to a low strain sensitivity in the detection of defects. This result opens up new possibilities for mounting spherical analyzers without degrading the energy resolution, at least for low energies. This is a path that may be used to construct a soft inelastic X‐ray scattering spectrometer where different applications such as element‐specific magnetic imaging tools could be explored.

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Section: Introductionmentioning

confidence: 99%

Exotic X-ray back-diffraction: a path toward a soft inelastic X-ray scattering spectrometer

et al. 2014

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“…1). Other phase contrast X-ray imaging experiments [27,28], including diffraction enhanced imaging [29–32] and PBI [9,30] had been already carried out at LNLS, however, in a diffraction beamline which does not have well prepared optical elements specially for imaging, like IMX has. The IMX beamline is a 20 m long beamline.…”

Section: Methodsmentioning

confidence: 99%

“…The method, termed phase contrast x-ray imaging (PCI), explores the real part of the refraction index, besides the imaginary part (responsible for the photoelectric absorption), to enhance the contrast. The real part of the refraction index can be explored by the deformation of the x-ray wavefront when passing through the object (propagation-based x-ray phase contrast imaging) [6–9], or by the deviations of the beam when passing by the sample, which can be explored by phase (x-ray interferometer, Talbot-Lau interferometer, coded-aperture) [10–12] or by the angular deviations of the beam (diffraction enhanced imaging or analyzer-based imaging) [13–16]. PCI medical applications have received increasing interest over the past few years and efforts to implement the technique as a clinical equipment [17–21], including breast cancer investigation and joint imaging [22].…”

Section: Introductionmentioning

confidence: 99%

Are Human Peripheral Nerves Sensitive to X-Ray Imaging?

et al. 2015

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Diagnostic imaging techniques play an important role in assessing the exact location, cause, and extent of a nerve lesion, thus allowing clinicians to diagnose and manage more effectively a variety of pathological conditions, such as entrapment syndromes, traumatic injuries, and space-occupying lesions. Ultrasound and nuclear magnetic resonance imaging are becoming useful methods for this purpose, but they still lack spatial resolution. In this regard, recent phase contrast x-ray imaging experiments of peripheral nerve allowed the visualization of each nerve fiber surrounded by its myelin sheath as clearly as optical microscopy. In the present study, we attempted to produce high-resolution x-ray phase contrast images of a human sciatic nerve by using synchrotron radiation propagation-based imaging. The images showed high contrast and high spatial resolution, allowing clear identification of each fascicle structure and surrounding connective tissue. The outstanding result is the detection of such structures by phase contrast x-ray tomography of a thick human sciatic nerve section. This may further enable the identification of diverse pathological patterns, such as Wallerian degeneration, hypertrophic neuropathy, inflammatory infiltration, leprosy neuropathy and amyloid deposits. To the best of our knowledge, this is the first successful phase contrast x-ray imaging experiment of a human peripheral nerve sample. Our long-term goal is to develop peripheral nerve imaging methods that could supersede biopsy procedures.

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“…Currently, the major application of XBD instrumentation is for inelastic X-ray scattering experiments (Cai, 2004;Tirao et al, 2004;Fister et al, 2006;Hill et al, 2007;Verbeni et al, 2009;Sergueev et al, 2011;Mortensen et al, 2013;Sokaras et al, 2013;Ishikawa et al, 2015;Bolmatov et al, 2017). X-ray imaging techniques using XBD have also been proposed (Hö nnicke et al, 2008;Honnicke & Cusatis, 2009), and special attention has been given to the chemical bond contrast imaging techniques (Huotari et al, 2011;Sahle et al, 2017), since these may find use in a variety of applications.…”

Section: Introductionmentioning

confidence: 99%

X-ray back-diffraction: can we further increase the energy resolution by tuning the energy slightly below that of exact backscattering?

et al. 2019

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X‐ray beams at energies tuned slightly below that of exact backscattering (extreme conditions, where X‐ray back‐diffraction is almost extinguished – called residual XBD) are better focused if the experiment is carried out at lower energies in order to avoid multiple‐beam diffraction effects. Following previous work by the authors [Hönnicke, Conley, Cusatis, Kakuno, Zhou, Bouet, Marques & Vicentin (2014). J. Appl. Cryst.47, 1658–1665], herein efforts are directed towards characterizing the residual XBD beam of an ultra‐thin Si 220 crystal (UTSiXTAL) at ∼3.2 keV. To achieve the residual XBD condition the UTSiXTAL was cooled from 310 to 273 K. The results indicate that under this extreme condition the energy resolution can be further improved. Issues with the energy resolution measurements due to incoming beam divergence and the ultra‐thin crystal flatness are discussed.

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Long and compact x-ray pathway for experiments requiring high coherent x-ray beams

Cited by 10 publications

References 23 publications

Exotic X-ray back-diffraction: a path toward a soft inelastic X-ray scattering spectrometer

Exotic X-ray back-diffraction: a path toward a soft inelastic X-ray scattering spectrometer

Are Human Peripheral Nerves Sensitive to X-Ray Imaging?

X-ray back-diffraction: can we further increase the energy resolution by tuning the energy slightly below that of exact backscattering?

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