Dark field proton radiography
| Autor: | Frans Trouw, Rachel B. Sidebottom, B. A. Broder, Christopher Morris, Levi P. Neukirch, J. Medina, Tamsen Schurman, W. Z. Meijer, Amy Tainter, L. I. Martinez, Frank E. Merrill, Dale Tupa, Michelle A. Espy, Per E. Magnelind, Carl Wilde, M. G. Davis, Kathy Prestridge, Zhaowen Tang, Alexander Saunders, Jason Allison, Fesseha Mariam, Matthew S. Freeman, Ethan F. Aulwes, J. L. Tybo |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science genetic structures Physics and Astronomy (miscellaneous) Plane (geometry) business.industry Radiography 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Dark field microscopy Optics Transmission (telecommunications) 0103 physical sciences Chromatic aberration Physics::Accelerator Physics Area density 0210 nano-technology business Noise (radio) Beam (structure) |
| Zdroj: | Applied Physics Letters. 117:144103 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | A pre- and post-collimation scheme has been applied to high energy proton radiography to establish a dark field condition, which defaults to a state of no transmission until a scatterer is placed at the object plane. This technique, dark field proton radiography, provides two additional capabilities to a standard proton radiography setup. First, protons with a high degree of angular dispersion are removed from the beam, reducing the effects of chromatic aberrations and decreasing noise. Second, protons below the same threshold are removed from the beam downstream of the objects, effectively making the transmission highly sensitive to small amounts of scatter at the object plane. Initial results indicate that the system is highly sensitive to the presence of thinner materials and improves sensitivity to subtle areal density variations in thick objects. |
| Databáze: | OpenAIRE |
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