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Information × Registration Number 0222U003759, 0118U002317 , R & D reports Title Development of new dielectric UHF materials for resonators, which will increase the sensitivity of EPR devices, and the creation on their basis mini-EPR analyzer for rapid analysis in medicine and monitoring of the environment. Section 2. Development of a mini-EPR analyzer for express analysis in medicine and environmental monitoring on the basis of UHF resonators with optimized geometry popup.stage_title Head Yukhymchuk Volodymyr O., Доктор фізико-математичних наук Registration Date 26-05-2022 Organization VE Lashkarev Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine popup.description2 In order to establish the possibility of amplification of the magnetic component of the microwave field in the spatial region of the microwave resonator, suitable for the placement of film samples, simulation was performed dielectric resonator (DR), located in the middle of the metal. A rectangular parallelepiped, the dimensions of which are proportional to the dimensions of the metal resonator, was used as the DR. This DR creates its own oscillating mode, which corresponds to the own mode of the metal resonator. When using it, the maximum concentration of the magnetic field is observed inside the dielectric resonator. To be able to place the film sample inside the DR, it is divided into 2 equal parts, which are located at a short distance from each other (in the interval between the parts and the test sample is located). According to the simulation results, it was found that the optimal dimensions of the DR made of a material with a dielectric constant of 36 is: 5.65 mm x 5.5 mm x 5.9 mm (for one part). When using a DR made of two such parts, it is possible to obtain signal amplification at a distance between these parts of up to 0.5 mm. To confirm the effectiveness of dielectric inserts (DC) in the continuation of last year's work, samples of relevant materials were made for their study by EPR. For this purpose, powders of highly mineralized tissues of the human body - enamel, dentin and bone tissue were prepared. The powders were irradiated with ionizing radiation in order to form radiation paramagnetic defects. After that, the irradiated powders were mounted in capillaries with an outer diameter of 1.5 mm and their EPR spectra were recorded both with and without a dielectric insert. A cylinder with a through hole along the cylinder axis with an outer radius of 2.85 mm, an inner radius of 0.75 mm and a height of 1.85 mm, made of ceramics based on barium tetratitanate (BaTi4 O9 + 8.5 Zn) was used as a long-distance transmission.Obtained EPR signal gain up to 10. Product Description popup.authors Vorona Ihor P. Golovina Iryna S. Lemishko Sergiy V. popup.nrat_date 2022-05-26 Close