Search results for " currents"

showing 3 items of 73 documents

Dynamical analysis of electron transport in RF cavities and photomultipliers tubes

2021

El objetivo de este trabajo es el estudio de la dinámica de haces y corrientes de electrones en cavidades aceleradoras de radiofrecuencia (RF) y en tubos fotomultiplicadores. Por una parte, los haces de electrones presentan una gran importancia histórica tanto en aplicaciones directas (televisiones, hornos de microondas, tratamiento del cáncer), como en la generación de radiación sincrotrón. La última generación de fuentes de rayos X muy brillantes se basa en los láseres de electrones libres (XFEL). No obstante, para producir los haces de electrones que emitirán dichos rayos X como radiación sincrotrón, se necesitan campos eléctricos de gran intensidad lo que produce que, debido a la emisió…

secondary electron emissionphotomultiplier tubesBoris methodsimulationselectron transportdark currentsrf cavities
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First Evidence of Contourite Drifts in the North-Western Sicilian Active Continental Margin (Southern Tyrrhenian Sea)

2021

We present the results of an integrated geomorphological and seismo-stratigraphic study based on high resolution marine data acquired in the north-western Sicilian continental margin. We document for the first time five contourite drifts (marked as EM1a, EM2b, EM2, EM3a, and EM3b), located in the continental slope at depths between ca. 400 and 1500 m. EM1a,b have been interpreted as elongated mounded drifts. EM1a,b are ca. 3 km long, 1.3 km wide, and have a maximum thickness of 36 m in their center that thins northwards, while EM1b is smaller with a thickness up to 24 m. They are internally characterized by mounded seismic packages dominated by continuous and parallel reflectors. EM2 is loc…

seismic reflection dataSettore GEO/02 - Geologia Stratigrafica E SedimentologicaSettore GEO/03 - Geologia StrutturaleSettore GEO/04 - Geografia Fisica E GeomorfologiaNaval architecture. Shipbuilding. Marine engineeringVM1-989Ocean EngineeringGC1-1581OceanographyPaleontologyMediterranean seaContinental marginAggradationMediterranean Seacontinental slopemoatHoloceneWater Science and TechnologyCivil and Structural Engineeringgeographygeography.geographical_feature_categoryContinental shelfcontouritesContouriteSeafloor spreadinglanguage.human_languagelanguagebottom currentsSiciliancontourites; bottom currents; continental slope; moat; seismic reflection data; Mediterranean SeaGeology
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A Model for the Study of Sheath Currents in Medium Voltage Cables for Industrial Application

2020

In this paper, the implementation of a simulation model for studying the effect of cross-bonding of metallic sheaths and/or non-magnetic armor of single-core medium voltage cables in the same circuit is discussed. With the use of single-core cables, the resistive losses due to the induced circulating currents in cable sheaths or armors causes an increase of cable temperature that reduces its ampacity. In addition, the risk of electric shock due to induced voltages may be present if a person is exposed to the armor/sheath at the unbounded end. For this reason, special bonding techniques are used to significantly reduce these currents. The authors have implemented a model that could be used t…

sheath currentsResistive touchscreenCross-bondingMaterials scienceArmourElectric shock020209 energy020208 electrical & electronic engineeringMechanical engineering02 engineering and technologymedicine.diseaseLine (electrical engineering)MV cablesSettore ING-IND/33 - Sistemi Elettrici Per L'Energia0202 electrical engineering electronic engineering information engineeringmedicineAmpacityVoltage
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