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Comparison of photon transport efficiency in simple scintillation electron detector configurations for scanning electron microscope
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SYSNO ASEP 0552072 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Comparison of photon transport efficiency in simple scintillation electron detector configurations for scanning electron microscope Author(s) Schauer, Petr (UPT-D) RID, SAI, ORCID Number of authors 1 Source Title Microscopy Research and Technique - ISSN 1059-910X
Roč. 85, č. 5 (2022), s. 1870-1883Number of pages 14 s. Publication form Print - P Language eng - English Country US - United States Keywords light guide ; MC simulation ; scintillator ; SEM electron detector Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Electrical and electronic engineering R&D Projects TN01000008 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Limited access Institutional support UPT-D - RVO:68081731 UT WOS 000738349000001 EID SCOPUS 85122267363 DOI 10.1002/jemt.24048 Annotation The purpose of this paper is to find some general rules for the design of robust scintillation electron detectors for a scanning electron microscope (SEM) that possesses an efficient light-guiding (LG) system. The paper offers some general instructions on how to avoid the improper design of highly inefficient LG configurations of the detectors. Attention was paid to the relevant optical properties of the scintillator, light guide, and other components used in the LG part of the scintillation detector. Utilizing the optical properties of the detector components, 3D Monte Carlo (MC) simulations of photon transport efficiency in the simple scintillation detector configurations were performed using the computer application called SCIUNI to assess shapes and dimensions of the LG part of the detector. The results of the simulation of both base-guided signal (BGS) configurations for SE detection and edge-guided signal (EGS) configurations for BSE detection are presented. It is demonstrated that the BGS configuration with a matted disc scintillator exit side connected to the cylindrical light guide without optical cement is almost always a sufficiently efficient system with a mean LG efficiency of about 20%. It is simulated that poorly designed EGS strip configurations have an extremely low mean LG efficiency of only 0.01%, which can significantly reduce detector performance. On the other hand, no simple nonoptimized EGS configuration with a light guide widening to a circular or square profile, with a polished cemented scintillator and with an indispensable hole in it has a mean LG efficiency lower than 6.5%. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2023 Electronic address https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/jemt.24048
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