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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000298320400012

EID výsledku v databázi Scopus

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