A portable Digital Multipulse NQR Spectrometer for the Study of the Sensory Properties, Structure and Defects in Layered Semiconductors

Samila, Andriy; Politansky, Leonid; Hotra, O.

doi:10.1109/tcset49122.2020.235400

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…As a hardware base for the implementation of the proposed configuration structure, we used the motherboard of a pulsed NQR sensor ( Figure 7 a), the operating principle of which is described in detail in [ 21 , 31 ]. The core of the motherboard is an FPGA EP4CE15E22C8, the internal structure of which contains more than 15,000 logic gates.…”

Section: Hardware Implementation and Experimentsmentioning

confidence: 99%

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Samila

Hotra

Majewski

2021

Sensors

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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 comprises the following modules: a three-channel direct digital synthesizer (DDS), a pulse sequence shaper and a software-defined radio. Experimental studies carried out using the in-circuit analyzer SignalTap Logic Analyzer have confirmed the reliability of the correct and stable operation of the functional modules of the configuration structure at all stages of signal transformations, starting from the formation of the envelope of the excitation pulses and ending with the obtainment of low-frequency quadrature signals at the outlet of the compensating filters. The time and frequency dependences of the amplitude of the output signals generated using the DDS based on a 48 bit phase accumulator are investigated. This development can be used when creating pulsed coherent NQR sensors in the frequency range of 1 MHz–50 MHz.

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Section: Hardware Implementation and Experimentsmentioning

confidence: 99%

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Samila

Hotra

Majewski

2021

Sensors

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“…A block diagram of the developed device is simple, since all main modules of digital processing and synthesis on the field-programmable gate array (FPGA) are implemented ( Figure 1). In more detail, this block diagram and the principle of operation are described in paper [1]. Some parts and units of the proposed device are described in detail in papers [14][15][16][17][18][19].…”

Section: Measuring Setup For the Study Of Nqrmentioning

confidence: 99%

“…This paper is an extension of work originally presented in TCSET-2020 [1]. Gallium and indium monoselenides (GaSe, InSe) are semiconductor compounds of the A III B VI group.…”

Section: Introductionmentioning

confidence: 96%

“…The levels of quadrupole energy in a solid substance arise when quadrupole moments interact with a non-uniform electric field at the location of the resonating nucleus, therefore the NQR spectrum reflects the distribution of electron density near a certain atom. Therein lies the uniqueness of the NQR method in the study of the fine features of the structure of chemical compounds [1].…”

Section: Introductionmentioning

confidence: 99%

“…Gallium and indium monoselenides (GaSe, InSe) are semiconductor compounds of the A III B VI group. They possess a number of interesting physical properties and a specific chemical structure which has sparked interest in them over the past half century [1][2][3][4][5][6][7]. The increased interest in these materials is caused by the possibilities of their application: in nonlinear optics, in solar energy converters, in high-sensitivity infrared optical sensors, in solid-state current sources and high-sensitivity pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals

Hotra

Samila

2020

Electronics

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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 input sensitivity of the device is of the order of 3 μV to 5 μV which allows conducting NQR studies in samples of relatively small dimensions. The application of the developed methods of NQR pulsed radio spectroscopy made it possible to increase spectral resolution, improve spectral shape and significantly reduce the time of research. In the case of studying InSe and GaSe crystals, spectra with signal-to-noise ratio (SNR) values of 41.9 dB were observed in samples with a volume of 0.1 cm3. As the results of the research have shown, the characteristics of the proposed spectrometer make it effective when used to observe free induction decay (FID) signals of a significant number of isotopes of elements with quadrupolar nuclei.

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Design and investigation of a low-noise preamplifier SPICE-model for pulsed nuclear quadrupole resonance spectroscopy

Moisiuk,

Tkach,

Samila

2024

Sixteenth International Conference on Correlation Optics

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A portable Digital Multipulse NQR Spectrometer for the Study of the Sensory Properties, Structure and Defects in Layered Semiconductors

Cited by 4 publications

References 5 publications

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals

Design and investigation of a low-noise preamplifier SPICE-model for pulsed nuclear quadrupole resonance spectroscopy

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