Differential phase contrast with a segmented detector in a scanning X-ray microprobe
| Autor: | Stefan Vogt, Michael Feser, Peter Holl, Chris Jacobsen, Christian Holzner, Pavel Rehak, M. D. de Jonge, Benjamin Hornberger, Daniel Legnini, Lothar Strüder, David Paterson |
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| Rok vydání: | 2008 |
| Předmět: |
Nuclear and High Energy Physics
Photon Materials science Physics::Instrumentation and Detectors Synchrotron radiation Advanced Photon Source Fluorescence spectroscopy law.invention Optics law Microscopy Phase-Contrast Myocytes Cardiac Absorption (electromagnetic radiation) Instrumentation Diatoms Radiation business.industry Detector Proteins Spectrometry X-Ray Emission Particle accelerator Research Papers Fluorescence Microspheres Computer Science::Computer Vision and Pattern Recognition Polystyrenes business |
| Zdroj: | Journal of Synchrotron Radiation. 15:355-362 |
| ISSN: | 0909-0495 |
| DOI: | 10.1107/s0909049508008509 |
| Popis: | Scanning X-ray microprobes are unique tools for the nanoscale investigation of specimens from the life, environmental, materials and other fields of sciences. Typically they utilize absorption and fluorescence as contrast mechanisms. Phase contrast is a complementary technique that can provide strong contrast with reduced radiation dose for weakly absorbing structures in the multi-keV range. In this paper the development of a segmented charge-integrating silicon detector which provides simultaneous absorption and differential phase contrast is reported. The detector can be used together with a fluorescence detector for the simultaneous acquisition of transmission and fluorescence data. It can be used over a wide range of photon energies, photon rates and exposure times at third-generation synchrotron radiation sources, and is currently operating at two beamlines at the Advanced Photon Source. Images obtained at around 2 keV and 10 keV demonstrate the superiority of phase contrast over absorption for specimens composed of light elements. |
| Databáze: | OpenAIRE |
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