Resolution limits of a single crystal scintillator based X-ray micro-radiography camera

0541071 - ÚFP 2022 RIV GB eng J - Článek v odborném periodiku
Touš, J. - Pařízek, J. - Blažek, K. - Šulc, Miroslav - Melich, Radek - Dušek, Martin - Vaněk, Tomáš
Resolution limits of a single crystal scintillator based X-ray micro-radiography camera.
Journal of Instrumentation. Roč. 15, č. 2 (2020), č. článku C02014. ISSN 1748-0221. E-ISSN 1748-0221
Grant CEP: GA MŠMT(CZ) EF16_026/0008390
Institucionální podpora: RVO:61389021 ; RVO:68378271
Klíčová slova: Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators) * X-ray detectors * X-ray radiography and digital radiography (DR)
Obor OECD: Optics (including laser optics and quantum optics); Optics (including laser optics and quantum optics) (FZU-D)
Impakt faktor: 1.415, rok: 2020
Způsob publikování: Omezený přístup
https://iopscience.iop.org/article/10.1088/1748-0221/15/02/C02014

Recently, high resolution micro-radiography became of great interest. Very thin scintillator layers of about 5-20 micrometres are used to achieve spatial resolution below one micrometre in application for low energy X-ray micro-radiography [1]. Such thin screens are mainly used in micro-XCT and nano-XCT systems (X-ray Computed Tomography) with either micro-focus X-ray tubes or with synchrotron sources [2]. This work deals with a high-resolution CCD camera together with different optical systems and different single crystal scintillators in application for low energy X-ray micro-radiography. The light distribution on the screen is re-imaged by an optical system (usually represented by classical microscope objective together with a field lens) to a high-resolution CCD or CMOS chip. A theoretical modelling and practical comparison of a camera set-up has been done to investigate the system resolution limits. Thin screens were prepared from YAG:Ce scintillator. The resolution is presented on test patterns. As recent optical systems are limited to the classical microscopy objectives only, we further investigate a possibility to develop a custom-made objective fully dedicated to X-ray imaging application.
Trvalý link: http://hdl.handle.net/11104/0318651