High-contrast low-dose proton radiography of thin samples at the Tandetron accelerator

0565832 - ÚJF 2023 RIV FR eng C - Conference Paper (international conference)
Olšanský, Václav - Granja, C. - Oancea, C. - Krist, Pavel - Macková, Anna - Havránek, Vladimír - Bíla, J.
High-contrast low-dose proton radiography of thin samples at the Tandetron accelerator.
EPJ Web of Conferences. Vol. 261. Les ulis: EDP sciences, 2022, č. článku 01005. E-ISSN 2100-014X.
[Applied Nuclear Physics Conference (ANPC 2021). Prague (CZ), 12.09.2021-17.09.2021]
Research Infrastructure: CANAM II - 90056
Institutional support: RVO:61389005
Keywords : pixel detectors * micro beam
OECD category: Nuclear related engineering
https://doi.org/10.1051/epjconf/202226101005

We investigate the ability of using high-resolution position-sensitive pixel detector and standard non-scanning beams of low-energy protons in air as a flexible tool and simplified technique for density-sensitivity imaging of thin samples. Proton radiography can provide high contrast and low radiation dose delivered to the inspected sample. Density-sensitive contrast response can be provided by a single proton per imaging pixel. For this purpose, we use the silicon semiconductor high-resolution pixel detector Timepix3 to evaluate particle radiography of thin samples with monoenergetic low-energy proton beams from the Tandetron light-ion accelerator. Measurements were performed with various well-defined thin samples. A proton micro beam was used to test and evaluate the technique. Spatial information of the samples is provided by the imaging detector. Density-sensitive contrast is obtained from the measurement of small differences in the deposited energy of transmitted protons across the sample. The transmitted protons are detected with high spatial resolution in the pixel detector. The single particle tracks registered in the detector are analysed by detailed pattern recognition algorithms. Various of these track parameters of spectral response are used for imaging contrast. Resulting proton radiographies for various well-defined thin samples are presented.
Permanent Link: https://hdl.handle.net/11104/0337323