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| PIRADUNEW – Perspektívne detektory ionizujúceho žiarenia pre nepokryté energetické okno neutrónov | |
| Perspective ionizing radiation detectors for the uncovered neutron energy window | |
| Program: | SRDA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Annotation: | The subject of the presented project is the optimization and preparation of semiconductor detection structuresbased on 4H-SiC and polycrystalline diamond suitable for neutron detection. As part of the project, single detectorswill be prepared and investigated, especially for neutron energies from 100 keV to several MeVs. There arecurrently few sensitive detectors in this area of neutron energy. The advantages of SiC and polycrystalline diamond are the high radiation and temperature resistance of structures. The high spectrometric capability of SiC detectors is also important, especially when detecting neutrons with energies below 1 MeV. Polycrystalline diamond is m ore affordable than SiC, and our first preliminary results show its promising detection properties, especially when detecting ionizing particles. Another advantage of both types of semiconductors is the low sensitivity to gamma radiation, which is almost always present in the event that neutrons are formed during a nuclear reaction. This gamma ray enhances the background and impairs the sensitivity of the detectors currently in use. Pixel sensors for the Timepix/Medipix reading chip will also be developed and investigated. Prototypes of the radiation camera will be tested and calibrated using a monoenergetic neutron source. |
| Duration: | 1.7.2023 – 30.6.2027 |
| GRaDe – Rastové a radiačné mechanizmy v diamantových hybridních detektoroch | |
| Growth and Radiation Mechanisms in Diamond Hybrid Detectorsd Radiation Mechanisms in Diamond Hybrid Detectors | |
| Program: | SRDA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.7.2022 – 30.6.2025 |
| Vysokoodolné polovodičové senzory ionizujúceho žiarenia pre využitie v radiačnom prostredí | |
| Radiation resistant semiconductor sensors for utilization in harsh environment | |
| Program: | VEGA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Annotation: | Recently, detectors of ionizing radiation are important part of many fields of science and research. The object of proposal is research of various semiconductor detector structures based on Si, GaAs, 4H-SiC and CdTe as a detector of ionizing radiation where 4H-SiC is wide bandgap semiconductor which is radiation resistant material suitable for long term work in harsh environment. This includes optimization of prepared sensor in term of utilization and also what type of radiation will be detected. Also passivation and encapsulation is important in long term word of prepared sensors. The contribution will be also in the simulation due to optimization of size and thickness of sensor contacts and passivation. The prepared structures will be characterized by electrical (curren-voltage and capacitance-voltage measurements) and spectrometric measurements using standartly used radioisotope sources. Also radiation hardness of samples will be tested (increased temperature, ionizing environment). |
| Duration: | 1.1.2020 – 31.12.2023 |
| Vysokovýkonná zakrivená röntgenová optika pripravená pokročilou technológiou nanoobrábania | |
| High-performance curved X-ray optics prepared by advanced nanomachining technology | |
| Program: | VEGA |
| Project leader: | Ing. Zápražný Zdenko, PhD. |
| Annotation: | The project is focused on the research and development of new types of X-ray optics with highly accurate curvedactive surfaces. The surfaces will be prepared by an innovative nanomachining technology. We will investigatethe application of nanomachining technology to a special case of X-ray optics with curved surfaces, which is aparabolic refractive lens operating in the transmission geometry. The second special case we will focus on will bethin crystal monochromators with different thicknesses in a range of 20-2000 micrometers. Such elements can beused for example as beam splitters in modern X-ray free-electron lasers (XFEL), bent crystals in Johanssonmonochromators for spectroscopic applications, or they can also be used in particle accelerators for beamsteering. The developed elements of curved X-ray optics will be tested in real X-ray metrology and X-ray imagingexperiments using laboratory or synchrotron X-ray sources and highly sensitive directly converting X-raydetectors Pilatus and Medipix. |
| Duration: | 1.1.2021 – 31.12.2023 |
| Radiačne odolnejší senzor pre RTG zobrazovanie vyššej kvality | |
| Radiation harder sensor for X-ray imaging of higher quality | |
| Program: | SRDA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.7.2019 – 30.6.2023 |
| Výskum radiačne odolných polovodičových detektorov pre jadrovú energetiku | |
| Research of radiation resistant semiconductor detector for nuclear energies | |
| Program: | SRDA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.7.2019 – 31.12.2022 |
| Detekcia ionizujúcich častíc s využitím senzorov na báze semiizolačného GaAs a 4H-SiC pre fyziku vysokých energií | |
| Detection of ionizing particles using sensors base on semi-insulating GaAs and 4H-SiC for high energy physics | |
| Program: | VEGA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Annotation: | The submitted project concern with research of semiconductor detectors based on semi-insulating GaAs and high quality 4H-SiC epitaxial layer as a detectos of ions and fast neutrons, which includes: – the technology study of preparation optimized detection structures of ionizing radiation; – simulation of detection performance of structures and their optimization in term of area and thickness of used metalization contacts as well as whole detection volume of structures; – study of physical and electrical properties of prepared structures, measurement of detection performances of detector structures using alpha particles, high energy ions (40 MeV Xe+), fast neutrons; – investigation of radiation hardness of prepare structures against high energy ions (Kr+, Xe+ 167 MeV) and electrons (5 MeV), study of electrical and detection parameters; – optimization and desing of connected spectrometry chain, which includes modifying and adaption of preamplifier with the aim of reaching best energy resolution. |
| Duration: | 1.1.2016 – 31.12.2019 |
| Výskumno-vývojové centrum pre pokročilé rtg technológie | |
| Research and development center for advanced X-ray technologies | |
| Program: | EU Structural Funds Research & Development |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.6.2012 – 31.3.2016 |
| Nové polovodičové detektory neutrónov | |
| New semiconductor detectors of neutrons | |
| Program: | SRDA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.7.2012 – 31.12.2015 |
| Pixelové senzory rtg. a gama žiarenia pre použitie najmä v digitálnej | |
| Pixel sensors of X- and gamma rays for using primarily in digital imaging | |
| Program: | VEGA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.1.2013 – 31.12.2015 |
| Polovodičové detektory pre diagnostiku horúcej plazmy | |
| Semiconductor radiation detectors for hot plasmas diagnostics | |
| Program: | VEGA |
| Project leader: | Mgr. Zaťko Bohumír, PhD |
| Duration: | 1.1.2010 – 31.12.2012 |