Results 21 to 30 of about 5,188,114 (289)

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

open access: yesEnergies, 2020
Cross-linked polyethylene, commercially known as XLPE, is widely used as an insulating material in high voltage cables. However, space charge accumulation under the DC field is one of the most challenging problems in the further development of XLPE ...
Yunpeng Zhan   +6 more
doaj   +1 more source

Space-Charge Dynamics of Liquids [PDF]

open access: yesThe Physics of Fluids, 1972
The propagation and instability characteristics of small-signal electro-fluid-mechanical space-charge and polarization waves in nonhomogeneous fluids are developed. Stratified equilibrium configurations with fluid properties and space-charge density constant within planar, cylindrical, and spherical surfaces, are emphasized. Equilibrium electric fields
Zahn, Markus, Melcher, James R.
openaire   +1 more source

Fast head-tail instability with space charge

open access: yesPhysical Review Special Topics. Accelerators and Beams, 1998
The fast head-tail instability with space charge is studied using series expansion techniques, numerical simulations, and a new formulation which allows for precise estimates of growth rates and thresholds.
M. Blaskiewicz
doaj   +1 more source

Transverse stability with nonlinear space charge

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2001
Transverse stability with nonlinear space charge is studied within the context of coasting beams. For bare tune spreads originating from chromaticity or frequency slip, the space charge tune spread has a fairly small effect and the incoherent space ...
M. Blaskiewicz
doaj   +1 more source

Space charge behaviors in cable insulation under a direct current‐superimposed pulsed electric field

open access: yesHigh Voltage, 2021
When high‐voltage direct current (HVDC) cables are subjected to a direct current(DC)‐superimposed pulsed electric stress, the pulsed voltage applied facilitates electrical tree generation and breakdown; however, the mechanism involved remains unclear. To
Dongxin He   +6 more
doaj   +1 more source

Space Charge Effects

open access: yes, 2014
The space charge forces are those generated directly by the charge distribution, with the inclusion of the image charges and currents due to the interaction of the beam with a perfectly conducting smooth pipe. Space charge forces are responsible for several unwanted phenomena related to beam dynamics, such as energy loss, shift of the synchronous phase
FERRARIO, MASSIMO   +2 more
openaire   +3 more sources

Transverse mode-coupling instability and space charge

open access: yesPhysical Review Accelerators and Beams, 2018
Transverse mode-coupling instability (TMCI) is known to limit bunch intensity. Since space charge (SC) changes coherent spectra, it affects the TMCI threshold.
T. Zolkin, A. Burov, B. Pandey
doaj   +1 more source

Modeling of space charge dynamics in polyethylene under AC stress based on bipolar charge transport model

open access: yesMaterials Research Express, 2020
Space charge dynamics under AC stress is of importance as a majority of high voltage cables are under AC stress, and space charge is the driving mechanism of dielectric degradation under these conditions.
Xinjing Cai   +3 more
doaj   +1 more source

rf barrier compression with space charge

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2010
Because of the long synchrotron period between the two barriers, bunch compression in a barrier bucket is usually relatively slow. The conservation of the phase space area requires that the compression is performed adiabatically, that is much slower than
Oliver Boine-Frankenheim
doaj   +1 more source

Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements

open access: yesIET Nanodielectrics, 2020
In this study, the relationship between thermal ageing and charge trapping properties of epoxy-based nanocomposites has been investigated. With ageing, any dielectric material undergoes thorough degradation.
Subhajit Maur   +7 more
doaj   +1 more source

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