Results 211 to 220 of about 111,624 (264)
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AIP Conference Proceedings, 2001
The next generation of linac-based free electron lasers will use very short bunches with a large peak current. For such beams, the impedance caused by submicron imperfections in the vacuum beam tube may generate an additional energy spread within the bunch.
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The next generation of linac-based free electron lasers will use very short bunches with a large peak current. For such beams, the impedance caused by submicron imperfections in the vacuum beam tube may generate an additional energy spread within the bunch.
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Surface impedance of real superconducting surfaces
Cryogenics, 1985Abstract The surface impedance of London superconductors with two-dimensional rectangular grooves of infinite length imitating surface roughness is calculated. Dependences of the effective surface impedance and penetration depth on roughness size are obtained for an arbitrary magnetic field direction.
F.F. Mende +3 more
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Surface Impedance of Superconductors
Physical Review, 1960A detailed calculation of the surface impedance of superconductors is given based on the general theory of the anomalous skin effect in normal and superconducting metals given by Mattis and Bardeen. It is found that there are large corrections to the extreme anomalous limit value of the superconducting to normal surface resistance ratio; corrections to
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Zeitschrift f�r Physik B Condensed Matter and Quanta, 1978
The concept of surface impedanceZ E of an electric ac-fieldE ⊥ perpendicular to metal surfaces is developed and then applied to clean and oxide coated metals. Whereas clean metals show values forZ E which are not detectable, yet; oxide coated metals show very much enhancedZ
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The concept of surface impedanceZ E of an electric ac-fieldE ⊥ perpendicular to metal surfaces is developed and then applied to clean and oxide coated metals. Whereas clean metals show values forZ E which are not detectable, yet; oxide coated metals show very much enhancedZ
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Surface mapping of thoracic impedance cardiograms
Medical & Biological Engineering & Computing, 1982A method is desbribed for mapping the electrical impedance cardiac signal on the anterior thoracic surface in man. A sinusoidal current was injected through electrodes placed around the neck and lower abdomen and voltage differences were measured with a single exploratory electrode at 30 well defined position on the thorax and upper abdomen.
R B, Panerai, A G, Neto
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Surface Impedance of Superconductors
Reviews of Modern Physics, 1964Surface impedance theory and measurements at a few kMc or less on superconductors near the weak coupling limit (e.g., Sn) are reviewed. Discrepancies between theory and experiment are noted, and it is found that all these discrepancies can be explained in terms of anisotropy of the Fermi surface, anisotropy of the energy gap, and inexactness of the ...
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Evaluation of surface impedance of hysteretic materials
IEEE Transactions on Magnetics, 2003In this paper, a numerical procedure capable to analyze the nonlinear diffusion of the electromagnetic field into a hysteretic magnetic conductor half-space is presented. The result of such calculation allows for the evaluation of the surface impedance of the material and the formulation of nonlinear impedance boundary conditions.
Bertoncini R. +3 more
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Characterization of surface roughness by EHD impedance
Journal of Applied Electrochemistry, 1997The EHD impedance response of a smooth electrode with a periodically distributed reactivity has beenpredicted [1, 2]. A quantitative analysis of the diagram can be performed which allows the averagedimensions of the active sites to be measured from consideration of the two time constants appearingin the response.
Deslouis, Claude +2 more
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Impedance of surface footings on layered ground
Computers & Structures, 2008Traditionally only the static bearing capacity and stiffness of the ground is considered in the design of wind turbine foundations. However, modern wind turbines are flexible structures with resonance frequencies as low as 0.2 Hz. Unfortunately, environmental loads and the passage of blades past the tower may lead to excitation with frequencies of the ...
Andersen, Lars, Clausen, Johan Christian
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International Journal of RF and Microwave Computer-Aided Engineering, 2020
AbstractIn this paper, the multiple refraction phenomenon is investigated on theboundary of a scalar impedance surface (SIS) and a tensor impedance surface(TIS).
Mojtaba Mighani, Gholamreza Dadashzadeh
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AbstractIn this paper, the multiple refraction phenomenon is investigated on theboundary of a scalar impedance surface (SIS) and a tensor impedance surface(TIS).
Mojtaba Mighani, Gholamreza Dadashzadeh
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