Infrared LED Enhanced Spectroscopic CdZnTe DetectorWorking under High Fluxes of X-rays

Kód výsledku v IS VaVaI

RIV/00216208:11320/16:10328932 - isvavai.cz

Nalezeny alternativní kódy

RIV/86652052:_____/16:N0000011

Výsledek na webu

http://dx.doi.org/10.3390/s16101591

DOI - Digital Object Identifier

10.3390/s16101591

Jazyk výsledku

angličtina

Název v původním jazyce

Infrared LED Enhanced Spectroscopic CdZnTe DetectorWorking under High Fluxes of X-rays

Popis výsledku v původním jazyce

This paper describes an application of infrared light-induced de-polarization applied on a polarized CdZnTe detector working under high radiation fluxes. We newly demonstrate the influence of a high flux of X-rays and simultaneous 1200-nm LED illumination on the spectroscopic properties of a CdZnTe detector. CdZnTe detectors operating under high radiation fluxes usually suffer from the polarization effect, which occurs due to a screening of the internal electric field by a positive space charge caused by photogenerated holes trapped at a deep level. Polarization results in the degradation of detector charge collection efficiency. We studied the spectroscopic behavior of CdZnTe under various X-ray fluxes ranging between 5 x 10(5) and 8 x 10(6) photons per mm(2) per second. It was observed that polarization occurs at an X-ray flux higher than 3 x 10(6) mm(-2) . s(-1). Using simultaneous illumination of the detector by a de-polarizing LED at 1200 nm, it was possible to recover X-ray spectra originally deformed by the polarization effect.

Název v anglickém jazyce

Infrared LED Enhanced Spectroscopic CdZnTe DetectorWorking under High Fluxes of X-rays

Popis výsledku anglicky

This paper describes an application of infrared light-induced de-polarization applied on a polarized CdZnTe detector working under high radiation fluxes. We newly demonstrate the influence of a high flux of X-rays and simultaneous 1200-nm LED illumination on the spectroscopic properties of a CdZnTe detector. CdZnTe detectors operating under high radiation fluxes usually suffer from the polarization effect, which occurs due to a screening of the internal electric field by a positive space charge caused by photogenerated holes trapped at a deep level. Polarization results in the degradation of detector charge collection efficiency. We studied the spectroscopic behavior of CdZnTe under various X-ray fluxes ranging between 5 x 10(5) and 8 x 10(6) photons per mm(2) per second. It was observed that polarization occurs at an X-ray flux higher than 3 x 10(6) mm(-2) . s(-1). Using simultaneous illumination of the detector by a de-polarizing LED at 1200 nm, it was possible to recover X-ray spectra originally deformed by the polarization effect.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Sensors

ISSN

1424-8220

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000386131600044

EID výsledku v databázi Scopus

2-s2.0-84989338255