Equalization of Medipix2 imaging detector energy thresholds using measurement of polychromatic X-ray beam attenuation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F11%3A00191767" target="_blank" >RIV/68407700:21670/11:00191767 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1748-0221/6/11/C11012" target="_blank" >http://dx.doi.org/10.1088/1748-0221/6/11/C11012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/6/11/C11012" target="_blank" >10.1088/1748-0221/6/11/C11012</a>

Result language

angličtina

Original language name

Equalization of Medipix2 imaging detector energy thresholds using measurement of polychromatic X-ray beam attenuation

Original language description

The single photon counting pixel detector Medipix2 is a powerful tool for energy resolved X-ray imaging. It allows the energies of incoming X-rays to be discriminated by setting an energy threshold common to all pixels. As the parameters of individual pixels vary, each pixel further contains a 3-bit digital-to-analogue converter (DAC) adjustment. Values of these DACs are traditionally determined by finding the noise floor in each pixel. Our approach is based on a polychromatic X-ray beam attenuation measurement. An attenuation curve is measured using varying thickness of aluminium foil. The attenuation curve is fitted in each pixel with a function calculating the detected signal. Free parameters of the fit are the beam intensity and the energy threshold. The measurement is done twice, with the threshold adjustment set to minimum resp. maximum value in all pixels. The result is a calibration of the adjustment DACs, allowing the value of the adjustment DAC in each pixel to be found such

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

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

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Volume of the periodical

6

Issue of the periodical within the volume

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Country of publishing house

IT - ITALY

Number of pages

8

Pages from-to

1-8

UT code for WoS article

000298320400012

EID of the result in the Scopus database

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