Browsing Інститут фізико-технічних та комп’ютерних наук by Author "Samila, Andriy"
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A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals
Samila, Andriy; Hotra, Oleksandra (MDPI, 2020-11-25)A low-cost digital pulsed nuclear quadrupole resonance (NQR) radio-spectrometer is proposed, all main modules of digital processing and synthesis of which on the field-programmable gate array (FPGA) are implemented. The ... -
A portable digital multipulse NQR spectrometer for the study of the sensory properties, structure and defects in layered semiconductors
Samila, Andriy; Hotra, Oleksandra; Politansky, Leonid (IEEE, 2020-02-29)The structure of a digital pulse coherent NQR spectrometer with a minimum number of functional units for the investigation of GaSe and InSe layered semiconductor crystals is proposed. The feature of the proposed measuring ... -
Evaluation of the contribution of higher-order electron-nuclear interactions to the NQR frequencies using 115In spectra in InSe
Samila, Andriy; Khandozhko, Alexander; Lastivka, Galina; Khandozhko, Victor (SPIE, 2021)The 115In NQR spectra in layered InSe single crystals for four spin transitions, the average values of which only approximately satisfied the ratio v1:v2:v3:v4 =1:2:3:4 were studied. It was found that for higher transitions ... -
Implementation of the configuration structure of an integrated computational core of a pulsed NQR sensor based on FPGA
Samila, Andriy; Hotra, Oleksandra; Majewski, Jacek (MDPI, 2021)This paper presents a method for implementing the configuration structure of an integrated computational core of a pulsed nuclear quadrupole resonance (NQR) sensor based on a field-programmable gate array (FPGA), which ... -
Structural and functional synthesis of the continuous wave NQR temperature sensor with increased conversion linearity
Samila, Andriy; Hotra, Oleksandra; Safronov, Igor (Elsevier, 2020-11-12)The paper describes development of the detailed structure and circuit diagrams of the continuous wave NQR temperature sensor with increased conversion linearity. It is experimentally established that at amplitude modulation ... -
Structural and functional synthesis of the radioelectronic means of a pulsed NQR
Samila, Andriy; Haliuk, Serhii; Krulikovskyi, Oleh (Stefan cel Mare University of Suceava, 2020-05-23)The principles of structural and functional synthesis of the radioelectronic means of a pulsed NQR are presented. To simulate signal transformations in the radio frequency paths of the spectrometer, an imitation model of ... -
Synthesis of the configuration structure of digital receiver of NQR radiospectrometer
Samila, Andriy; Hotra, Oleksandra; Politansky, Leonid (Society of Polish Electrical and Electronics Engineers, 2018)Analysis of methods for demodulation of free induction decay signal that are suitable for use in pulsed nuclear quadruple resonance radiospectrometers was performed. The structure and MATLAB Simulink model of the receive ... -
The use of marginal oscillator detector with increased conversion linearity for recording broadband multiplet nuclear quadrupole resonance spectra
Samila, Andriy (Sumy State University, 2021)This paper describes the features of choosing the sweep method and mode in the study of broadband multiplet nuclear quadrupole resonance (NQR) spectra using marginal oscillator sensor with increased conversion linearity. ...