Počet záznamů: 1
Overview of S(T)EM electron detectors with garnet scintillators: Some potentials and limits
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SYSNO ASEP 0544784 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Overview of S(T)EM electron detectors with garnet scintillators: Some potentials and limits Tvůrce(i) Schauer, Petr (UPT-D) RID, SAI, ORCID
Lalinský, Ondřej (UPT-D) RID, ORCID, SAI
Kučera, M. (CZ)Celkový počet autorů 3 Zdroj.dok. Microscopy Research and Technique - ISSN 1059-910X
Roč. 84, č. 4 (2021), s. 753-770Poč.str. 18 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova cathodoluminescence ; conductive coating ; garnet film scintillator ; light guide ; SEM electron detector Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika Obor OECD Electrical and electronic engineering CEP FV30271 GA MPO - Ministerstvo průmyslu a obchodu LO1212 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy ED0017/01/01 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UPT-D - RVO:68081731 UT WOS 000583346100001 EID SCOPUS 85096796587 DOI 10.1002/jemt.23634 Anotace The paper is focused on a complete configuration and design of a scintillation electron detector in scanning electron and/or scanning transmission electron microscopes (S(T)EM) with garnet scintillators. All processes related to the scintillator and light guide were analyzed. In more detail, excitation electron trajectories and absorbed energy distributions, efficiencies and kinetics of scintillators, as well as the influence of their anti-charging coatings and their substrates, assigned optical properties, and light guide efficiencies of different configurations were presented and discussed. The results indicate problems with low-energy detection below 1 keV when the scandium conductive coating with a thickness of only 3 nm must be used to allow electron penetration without significant losses. It was shown that the short rise and decay time and low afterglow of LuGdGaAG:Ce liquid-phase epitaxy garnet film scintillators guarantee a strong modulation transfer function of the entire imaging system resulting in a contrast transfer ability up to 0.6 lp/pixel. Small film scintillator thicknesses were found to be an advantage due to the low signal self-absorption. The optical absorption coefficients, refractive indices, and the mirror optical reflectance of materials involved in the light transport to the photomultiplier tube photocathode were investigated. The computer-optimized design SCIUNI application was used to configure the optimized light guide system. It was shown that nonoptimized edge-guided systems possess very poor light guiding efficiency as low as 1%, while even very complex optimized ones can achieve more than 20%. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2022 Elektronická adresa https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/jemt.23634
Počet záznamů: 1