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6CCVD Research

A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2018-05-07
JournalMDPI (MDPI AG)
AuthorsTomy dos Santos Rolo, Stefan Reich, Dmitry Karpov, Sergey Gasilov, N. Kunka
InstitutionsNew Mexico State University, Los Alamos National Laboratory
Citations25

Abstract

Section titled ā€œAbstractā€

An array of compound refractive X-ray lenses (CRL) with 20 × 20 lenslets, a focal distance of 20cm and a visibility of 0.93 is presented. It can be used as a Shack-Hartmann sensor for hard X-rays (SHARX) for wavefront sensing and permits for true single-shot multi-contrast imaging the dynamics of materials with a spatial resolution in the micrometer range, sensitivity on nanosized structures and temporal resolution on the microsecond scale. The object’s absorption and its induced wavefront shift can be assessed simultaneously together with information from diffraction channels. In contrast to the established Hartmann sensors the SHARX has an increased flux efficiency through focusing of the beam rather than blocking parts of it. We investigated the spatiotemporal behavior of a cavitation bubble induced by laser pulses. Furthermore, we validated the SHARX by measuring refraction angles of a single diamond CRL, where we obtained an angular resolution better than 4 μ rad.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 1996 - Phase-contrast imaging using polychromatic hard X-rays [Crossref]
  2. 2012 - Theoretical comparison of three X-ray phase-contrast imaging techniques: propagation-based imaging, analyzer-based imaging and grating interferometry [Crossref]
  3. 1996 - Phase objects in synchrotron radiation hard X-ray imaging [Crossref]
  4. 1965 - An X-ray Interferometer [Crossref]
  5. 2014 - Hard X-ray dark-field imaging with incoherent sample illumination [Crossref]
  6. 2003 - Demonstration of X-ray Talbot Interferometry [Crossref]
  7. 2005 - X-ray phase imaging with a grating interferometer [Crossref]
  8. 2006 - Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources [Crossref]
  9. 2009 - High-speed X-ray phase imaging and X-ray phase tomography with Talbot interferometer and white synchrotron radiation [Crossref]
  10. 2008 - Hard-X-ray dark-field imaging using a grating interferometer [Crossref]

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