Spectral-sensitive proton radiography of thin samples with the pixel detector Timepix3

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00559104" target="_blank" >RIV/61389005:_____/22:00559104 - isvavai.cz</a>

Alternative codes found

RIV/44555601:13440/22:43897485 RIV/68407700:21220/22:00360752

Result on the web

<a href="https://doi.org/10.1088/1748-0221/17/04/C04016" target="_blank" >https://doi.org/10.1088/1748-0221/17/04/C04016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/17/04/C04016" target="_blank" >10.1088/1748-0221/17/04/C04016</a>

Result language

angličtina

Original language name

Spectral-sensitive proton radiography of thin samples with the pixel detector Timepix3

Original language description

We evaluate a high-resolution contrast-enhanced method for energy-sensitive radiography of thin samples with low-energy protons at the light-ion Tandetron accelerator of the NPI-CAS in Rez near Prague. We make use of the high-sensitivity of the hybrid semiconductor pixel detectors Timepix enabled by integrated per-pixel signal processing electronics. For this work we use the Timepix3 ASIC chip equipped with a 500 mu m Si sensor operated with the fast data rate AdvaPix readout electronics interface. Measurements are performed in air with a 2.9MeV proton microbeam on thin samples (<100 mu m thick). As referential and testing sample we use a set of aluminum foils stacked into a closely packed assembly of varying layers of well-defined thickness. This and other samples were imaged and placed in front of the detector in transmission geometry. Radiographies were collected with focused beam (few mm size) and a microbeam (few mu m size). The imaging principle is based on high-resolution spectrometry of single transmitted particles. Contrast is obtained by registration of small differences in the deposited energy of the proton after passing through the sample. This can be measured in wide-range by detailed spectral-tracking analysis of the pixelated clusters in the pixel detector. We examine and evaluate various cluster-track parameters sensitive for imaging contrast such as deposited energy, cluster area (number of pixels) and cluster height (maximum energy value of the pixels in the cluster). The position of interaction in the detector is registered in sub-pixel resolution down to few mu m scale for the particles and geometry used. Radiographies are reconstructed based on these individual parameters imaged in image bins of adjustable size (few mu m up to few tens of mu m). The technique developedwith different cluster parameters is presented together with evaluation of image contrast sensitivity on various types of samples and beam energies.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

1748-0221

Volume of the periodical

17

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

C04016

UT code for WoS article

000819866900005

EID of the result in the Scopus database

2-s2.0-85128641142