First tests of Timepix detectors based on semi-insulating GaAs matrix of different pixel size

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F18%3A00319853" target="_blank" >RIV/68407700:21670/18:00319853 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/article/10.1088/1748-0221/13/02/C02013/" target="_blank" >http://iopscience.iop.org/article/10.1088/1748-0221/13/02/C02013/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/13/02/C02013" target="_blank" >10.1088/1748-0221/13/02/C02013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First tests of Timepix detectors based on semi-insulating GaAs matrix of different pixel size

Popis výsledku v původním jazyce

In this work, we have focused on Timepix detectors coupled with the semi-insulating GaAs material sensor. We used undoped bulk GaAs material with the thickness of 350 mu m. We prepared and tested four pixelated detectors with 165 mu m and 220 mu m pixel size with two versions of technology preparation, without and with wet chemically etched trenches around each pixel. We have carried out adjustment of GaAs Timepix detectors to optimize their performance. The energy calibration of one GaAs Timepix detector in Time-over-threshold mode was performed with the use of Am-241 and Ba-133 radioisotopes. We were able to detect gamma-photons with the energy up to 160 keV. The X-ray imaging quality of GaAs Timepix detector was tested with X-ray source using various samples. After flat field we obtained very promising imaging performance of tested GaAs Timepix detectors.

Název v anglickém jazyce

First tests of Timepix detectors based on semi-insulating GaAs matrix of different pixel size

Popis výsledku anglicky

In this work, we have focused on Timepix detectors coupled with the semi-insulating GaAs material sensor. We used undoped bulk GaAs material with the thickness of 350 mu m. We prepared and tested four pixelated detectors with 165 mu m and 220 mu m pixel size with two versions of technology preparation, without and with wet chemically etched trenches around each pixel. We have carried out adjustment of GaAs Timepix detectors to optimize their performance. The energy calibration of one GaAs Timepix detector in Time-over-threshold mode was performed with the use of Am-241 and Ba-133 radioisotopes. We were able to detect gamma-photons with the energy up to 160 keV. The X-ray imaging quality of GaAs Timepix detector was tested with X-ray source using various samples. After flat field we obtained very promising imaging performance of tested GaAs Timepix detectors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/EF16_013%2F0001785" target="_blank" >EF16_013/0001785: Urychlovač Van de Graaff - laditelný zdroj monoenergetických neutronů a lehkých iontů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

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

1748-0221

Svazek periodika

13

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000424627200003

EID výsledku v databázi Scopus

2-s2.0-85043477632