Dark field proton radiography

Freeman, Matthew S.; Allison, Jason Clark; Aulwes, Ethan Finn; Broder, B. A.; Davis, Matthew Garrett; Espy, Michelle A.; Magnelind, Per Erik; Mariam, Fesseha Gebre; Martinez, Lucas Isaac; Medina, Jaspm Jerry; Meijer, William Zachary; Merrill, Frank Edward; Morris, C.; Neukirch, Levi Patrick; Prestridge, K. P.; Saunders, A.; Schurman, Tamsen; Sidebottom, Rachel Brittany; Tainter, A. M.; Tang, Zhaowen; Trouw, Frans Raymond; Tupa, Dale; Tybo, Joshua L.; Wilde, C. H.

doi:10.1063/5.0021044

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Dark field proton radiography

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Abstract

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. Finally, 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.

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BibTeX RIS

Freeman, Matthew S., Allison, Jason Clark, Aulwes, Ethan Finn, Broder, B. A., Davis, Matthew Garrett, Espy, Michelle A., Magnelind, Per Erik, Mariam, Fesseha Gebre, Martinez, Lucas Isaac, Medina, Jaspm Jerry, Meijer, William Zachary, Merrill, Frank Edward, Morris, C., Neukirch, Levi Patrick, Prestridge, K. P., Saunders, A., Schurman, Tamsen, Sidebottom, Rachel Brittany, Tainter, A. M., Tang, Zhaowen, Trouw, Frans Raymond, Tupa, Dale, Tybo, Joshua L., Wilde, C. H.. 2020-10-09. Dark field proton radiography. https://doi.org/10.1063/5.0021044

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