Magnetoinductive Lens for Experimental Mid-field MR Tomograph

BartuÅ¡ek, Karel; Drexler, P.; Fiala, Pavel; Kadlec, R.; Kubasek, Radek

doi:10.2529/piers091219125036

Cited by 9 publications

(5 citation statements)

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“…f The complete relativistic model (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18), including the properties of plasma (21), will be evaluated at the follow-up stage of this research according to [39][40][41]. After the measurements and comparisons, we plan to embed a more detailed relativistic model in the analysis because the previous experiments [34] revealed the diverse impacts affecting the model (14)(15)(16)(17)(18).…”

Section: [A] P [Dbm]mentioning

confidence: 99%

“…One of the diagnostic approaches is embodied in the analysis of radio frequency (RF) electromagnetic signals, a procedure often utilized in tasks such as the diagnostics of microplasma [5][6][7][8], which generates high-frequency (HF) signals characterized by specific spectra. The actual discharge creates a compound signal [5][6][7][8] capable of being theoretically described and modeled [11][12][13][14][15][16][17][18][19][20]. To verify the functionality of the method, we employed an atmospheric-pressure plasma source, namely, a plasma pencil (Figure 1) similar to that modeled in report [11].…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Experimental Verification of Plasma Jet Electromagnetic Signals

et al. 2022

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Herein, we discuss the modeling and verification of RF sensed signals in a simple plasma channel (plasma jet) at the generator frequency of f = 13.56 MHz, assuming plasma discharge at atmospheric pressure. The actual experiment was preceded by a basic numerical analysis and evaluation of several variants of the geometric/numerical model of a simple plasma channel formed in a glass capillary chamber; this step was performed with different electrode configurations. The analyses also included the impact of the location of the sensing element (i.e., the antenna) on the resulting evaluated electromagnetic signal. Furthermore, a numerical model with concentrated parameters facilitated a comparative analysis centered on the impact of plasma concentration and composition in the monitored electromagnetic RF spectrum of the channel. The theoretical outputs were verified via experiments and compared. This methodology finds use in the radio-frequency evaluation of plasma parameters in both simple capillary nozzles and more complex, slit-designed plasma chambers.

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Section: [A] P [Dbm]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Verification of Plasma Jet Electromagnetic Signals

et al. 2022

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“…The modelingbased results may then be compared with those of the experiments to determine the overall match. This classic approach to numerical model creation has been widely employed [2,6,11,14,15,18,21,25,29,33,35,36,42,47,51,52], as also shown through the relevant criterion (1) ad A). To perform the associated qualitative analysis, it is convenient to use the classification embodied in the above precondition (1), ad B), which covers the behavior of the dynamic system inside the modeled structure; for cases of strong coupling between the internal and the external electromagnetic fields, some basic aspects of the modeled object are comprised, too.…”

Section: Relativity Limit Parameters Of the Electromagnetic Model Of A Carbon-based Periodic Structurementioning

confidence: 99%

“…Within the macroscopic model, both the maximum signal transmitted by the designed graphene-based polymer structure and the tangential electric strength are estimable by utilizing formula (30); the electric field intensity as the limit parameter E max is set according to Eq. (2) and can be, in the vicinity of an atom of the structure, considered identical for both the radial and the tangential components (2).…”

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confidence: 99%

Modeling Electromagnetic Nanostructures and Experimenting With Nanoelectric Elements to Form Periodic Structures

Steinbauer

Pernica

Zukal

et al. 2020

IAPGOS

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We discuss the numerical modeling of electromagnetic, carbon-based periodic structures, including graphene, graphane, graphite, and graphyne. The materials are suitable for sub-micron sensors, electric lines, and other applications, such as those within biomedicine, photonics, nano- and optoelectronics; in addition to these domains and branches, the applicability extends into, for example, microscopic solutions for modern SMART elements. The proposed classic and hybrid numerical models are based on analyzing a periodic structure with a high repeatability, and they exploit the concept of a carbon structure having its fundamental dimension in nanometers. The models can simulate harmonic and transient processes; are capable of evaluating the actual random motion of an electric charge as a source of spurious signals; and consider the parameters of harmonic signal propagation along the structure. The results obtained from the analysis are utilizable for the design of sensing devices based on carbon periodic structures and were employed in experiments with a plasma generator. The aim is to provide a broader overview of specialized nanostructural modeling, or, more concretely, to outline a model utilizable in evaluating the propagation of a signal along a structure’s surface.

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“…In nonclassical tomography like Electrical Impedance Tomography (EIT) [3,7,15], Capacitance Tomography (CT) [18,19], Sonic and Ultrasonic or Radio Tomography [8,13,14], as well as Magnetic Tomography and classical tomography [1,2,11,12] always there is a lack of information. In this paper, the problem of imaging has been brought to the solution of under or over-determined system of equation.…”

Section: Introductionmentioning

confidence: 99%

The Chances of Precision Enhance for Ultrasonic Imaging

Rymarczyk

Sikora²,

Adamkiewicz³

et al. 2018

IAPGOŚ

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The results of ultrasonic imaging with the aid of an algorithm with the virtual rays is presented in this paper. The signal associated with the virtual rays is calculated as an arithmetical mean value of the signals of the rays surrounding the virtual one. Developed algorithm was tested on synthetic free noise data then polluted synthetic data in order to move for the real measurements. Conclusions about the imaging with new algorithm are not obvious. In same cases the significant improvement was achieved but in some not.

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Magnetoinductive Lens for Experimental Mid-field MR Tomograph

Cited by 9 publications

References 0 publications

Modeling and Experimental Verification of Plasma Jet Electromagnetic Signals

Modeling and Experimental Verification of Plasma Jet Electromagnetic Signals

Modeling Electromagnetic Nanostructures and Experimenting With Nanoelectric Elements to Form Periodic Structures

The Chances of Precision Enhance for Ultrasonic Imaging

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