Results 11 to 20 of about 307,686 (264)

Effect of DC Pre-stress on Space Charge and Electrical Tree in XLPE with Needle-Plate Electrodes

open access: yesZhongguo dianli, 2021
Space charge is one of the main factors that affect the electrical tree characteristics of HVDC cable insulation. Based on the bipolar charge transport model, this paper simulates the space charge distribution characteristics of the two-dimensional ...
Xiaobin XU   +5 more
doaj   +1 more source

Dimensionality of charge space [PDF]

open access: yesIl Nuovo Cimento, 1956
There is no dearth of experimental evidence to indicate that real space-time is a four-dimensional manifold. At present there is much less certainty in attributing dimensions to the charge space of heavy particles, and it may be worth while to review various hypotheses and the meager experimental evidence in this regard. The Clebsch-Gordon coefficients
openaire   +2 more sources

Simulation of Influence of DC Pre-Stress on Space-Charge Characteristics of Cross-Linked Polyethylene in Inhomogeneous Field

open access: yesIEEE Access, 2020
Space charge is one of the main causes of electrical tree initiation in high-voltage cable insulation. To investigate the influence of DC pre-stress on the space-charge distribution of cross-linked polyethylene (XLPE), a two-dimensional needle-plate ...
Hechen Liu   +5 more
doaj   +1 more source

Modified Charge Transport Model Under High-Frequency Unipolar Square Wave Voltage

open access: yesFrontiers in Materials, 2022
As the main insulation material of the power electronic transformer (PET), polyimide (PI) is easy to accumulate space charge under the continuous high-frequency pulse voltage, which will threaten the operation of PET and cause electric field distortion ...
Jianxiang Xie   +4 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

Longitudinal phase space tomography with space charge

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2000
Tomography is now a very broad topic with a wealth of algorithms for the reconstruction of both qualitative and quantitative images. In an extension in the domain of particle accelerators, one of the simplest algorithms has been modified to take into ...
S. Hancock, M. Lindroos, S. Koscielniak
doaj   +1 more source

Impact of gamma‐irradiation on space charge and charge trap characteristics of Al/epoxy nanocomposites

open access: yesSPE Polymers, 2021
Epoxy nano Al composites were prepared using epoxyresin, hardener, and Al nanoparticles with required proportions and irradiated with gamma rays of required dosage.
Naresh Chillu   +2 more
doaj   +1 more source

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

Head-tail instability and Landau damping in bunches with space charge

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2010
Head-tail modes in bunches with space charge are studied using particle tracking simulations. The eigenfrequencies and eigenfunctions of transverse coherent oscillations in a Gaussian bunch are determined and compared with theories. A model for an airbag
V. Kornilov, O. Boine-Frankenheim
doaj   +1 more source

Impact of accelerated aging of epoxy‐Ni nanocomposites on space charge variation adopting pulsed electro acoustic technique

open access: yesSPE Polymers, 2020
Epoxy‐Ni nanocomposites of different weight percentages are subjected to accelerated aging by water aging, thermal aging and UV irradiation to understand the influence of aging conditions on their space charge behavior.
Myneni Sukesh Babu   +3 more
doaj   +1 more source

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