X-ray sources of nanosecond pulses based on semiconductor opening switch for CT

Komarskiy, A. A.; Korzhenevskiy, S. R.; Komarov, N. A.

doi:10.1063/5.0013238

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…Our laboratory is developing pulsed X-ray sources with a high pulse repetition rate based entirely on solid-state electronic components [19][20][21]. Instead of a gas-filled spark gap, the last circuit of our high-voltage pulse generator has a semiconductor opening switch (SOS) [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Dual-Energy Processing of X-ray Images of Beryl in Muscovite Obtained Using Pulsed X-ray Sources

Komarskiy

Korzhenevskiy

Пономарев

et al. 2023

Sensors

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This paper presents the development of a method for dual-energy processing of X-ray images using pulsed X-ray sources for the contrast detection of beryl in muscovite mica in 2D X-ray and CT images. These substances have similar chemical properties and are difficult to differentiate when one is against the background of the other using methods based on X-ray absorption. In the experiments, we used three pulsed X-ray sources with different maximum voltages. We performed modeling of the emission spectra and selection of the necessary energy bands due to X-ray absorbing filters: a positive effect was shown for dual-energy image processing when the function of converting X-ray radiation into a signal using the VIVIX-V 2323D detector was taken into account. As a result, a pulsed X-ray source with the pulse voltage of 330 kV was chosen for the contrast detection of beryl, with the content of 5–7% against the background of muscovite and the thickness up to 70 mm. Using this source and the developed mathematical algorithms, it is possible to obtain a band of low-energy radiation at the level of 70–80 keV, as well as high-energy radiation in the range of 180 keV. Methods based on the X-ray absorption can become both additional and independent methods for studying and monitoring membranes; these objects range from tens of nanometers to several micrometers in size.

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Section: Introductionmentioning

confidence: 99%

Dual-Energy Processing of X-ray Images of Beryl in Muscovite Obtained Using Pulsed X-ray Sources

Komarskiy

Korzhenevskiy

Пономарев

et al. 2023

Sensors

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“…Автор для переписки: Вдовин Владимир Александрович, vdv@cplire.ru Введение В настоящее время генераторы наносекундных видеоимпульсов напряжения становятся все более востребованными [1][2] как для фундаментальных физических исследований (ускорители заряженных частиц [3][4][5]; изучение стримерных разрядов [6]), так и для прикладных физических задач (рентгеноимпульсные аппараты [7][8]; источники [9] и излучатели [10][11][12] высокоинтенсивных сверхширокополосных микроволновых импульсов, используемые, например, для радаров [13]; генераторы накачки для полупроводниковых [14][15] и газовых [16][17] лазеров; технология электроэрозионного фрезерования [18][19]; альтернативный способ дезинтеграции минеральных руд [20]). Кроме того, значительный интерес представляет изучение воздействия нано-и субнаносекундных видеоимпульсов напряжения на биологические объекты (микроорганизмы в воде [21] и жидких пищевых продуктах [22]; мембраны клеток [23][24]; раковые опухоли [25]).…”

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“…Здесь С 1 представляет собой составляющую теплоемкости, которая возникает из-за температурной зависимости χ(T). Из (7)…”

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Discriminative suppression of interference in the superwideband radio channel

Trofimenko,

Kostin

2023

JRE

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Scientific and practical results and technical recommendations in the field of adaptive application of methods and means of radio-vision recognition of ultra-short pulse signals for radio monitoring and identification of channels of digital ultra-wideband radio communication are presented. As methods of research in the work are used the fundamental provisions of statistical radio engineering, as well as algorithms for the optimal detection of signals with a priori known parameters under the influence of additive white noise. As a fight against interference in the propagation of ultrashort pulses, a convolutional discriminatory method of compensation of resonant radio clicks is proposed. It was found that when using the discriminative parameters at a signal to noise ratio of 12 dB, the recognition probability is not less than 0.9.

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