Results 21 to 30 of about 5,429,621 (290)

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

Modification of Space Charge Pattern and Charge Mobility of Low Density Polyethylene (LDPE) in the presence of Crosslinking Byproducts [PDF]

open access: yes, 2009
The formation of space charge in Crosslinked Polyethylene (XLPE) cable has always been related to the byproducts such as acetophenone, ?-methylstyrene and cumyl alcohol. In this paper, the argument is to be justified.
Nuriziani Hussin   +3 more
core   +2 more sources

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 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

Space charge behavior in multi-layer oil-paper insulation under different DC voltages and temperatures [PDF]

open access: yes, 2010
Oil-paper as a reliable insulation system is widely used in power transformers and cables. The dielectric properties of oil-paper insulation play an important role in the reliable operation of power equipment. However, the formation and dynamics of space
Liao, Rujin   +7 more
core   +1 more source

The effect of gamma irradiation on space charge behaviour and dielectric spectroscopy of low-density polyethylene [PDF]

open access: yes, 2007
The influence of gamma irradiation on low-density polyethylene (LDPE) has been studied through space charge measurement and dielectric spectroscopy. Commercial LDPE film with a thickness of 100µm was irradiated with γ-rays at a dose rate of approximately
Chen Zou (1555771)   +15 more
core   +2 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

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

The Role of Space Charge on Corona Inception Threshold Conditions in Rod-Plane Air Gaps at DC/AC Combined Voltages

open access: yesIEEE Access, 2021
This work investigates the corona inception voltage and the motion of space charge near a rod-plane electrode under combined DC-AC voltages. For a high AC component, the corona inception voltage of the equivalent negative corona exceeds that of the ...
Xuyuan He   +6 more
doaj   +1 more source

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