Results 241 to 250 of about 5,429,621 (290)

Space charge effects in a kinestatic charge detector

Physics in Medicine and Biology, 1991
The effects of space charge in a kinestatic charge detector (KCD) were examined using computer solutions to Poisson's equation. The KCD is a strip-beam parallel-plate drift chamber used for digital radiography. It was assumed that there is negligible electron attachment, i.e. there are no negative ions formed.
D J, Wagenaar, F A, DiBianca, C R, Tenney, D, Fritsch   +3 more
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The charge‐tube method for space‐charge simulations

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1999
The charge‐tube method is an accurate way of assigning the space‐charge of a beam in computational simulations of charged particle systems. The method is described and is compared with the traditional charge‐cell method.
Read, F. H., Chalupka, A., Bowring, N. J.   +2 more
openaire   +1 more source

LOCALIZED SPACE-CHARGE WAVES IN SPACE-CHARGE DOMINATED BEAMS

International Journal of Modern Physics B, 1995
The physics of space-charge waves in space-charge dominated beams is presented. This includes the generation and propagation of such waves in coasting beams, and the end effect on space-charge waves in bunched beams. It is shown for the first time in experiments that a single space-charge wave can be generated, that the geometry factor g can be ...
J.G. WANG, M. REISER
openaire   +1 more source

Space-charge relaxation in perovskites

Physical Review B, 1994
We report a dielectric anomaly in several perovskites at intermediate frequencies 10\ensuremath{\le}f\ensuremath{\le}${10}^{7}$ Hz in the temperature range 400 \ifmmode^\circ\else\textdegree\fi{}C \ensuremath{\le}T\ensuremath{\le}800 \ifmmode^\circ\else\textdegree\fi{}C.
, Bidault, , Goux, , Kchikech, , Belkaoumi, , Maglione   +4 more
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Space Charge and Charge Transport in Polypropylene

2005 12th International Symposium on Electrets, 2006
Space charge distributions in various polypropylene (PP) films were measured with the PEA method. Specimens were 100 /spl mu/m-thick films of homo-PP and PP-copolymers including -3 wt% ethylene which were polymerized using metallocene or Ziegler catalysts.
T. Mizutani, E. Nakane, K. Kaneko, M. Ishioka, H. Takino   +4 more
openaire   +1 more source

Charge decay and space charge in corona-charged LDPE

Proceedings. 11th International Symposium on Electrets, 2003
The surface charge decay and space charge distribution in corona-charged low-density polyethylene (LDPE) were investigated. The space charge distribution was measured at 30/spl deg/C with the pulsed electro-acoustic (PEA) method, where a corona charged specimen was set between a semiconductive electrode and an Al electrode.
T. Mizutani, Y. Taniguchi, M. Ishioka
openaire   +1 more source

The space charge smoothing factor

Journal of the Institution of Electrical Engineers, 1951
The author has recently expressed the properties of a planar diode in terms of a set of differential coefficients, many of which can be experimentally determined. In the present paper these differential coefficients are used to derive a relation between the anode-current fluctuations and the fluctuation in the total emission.The fluctuation in the ...
openaire   +1 more source

Space Charge Compensation with DCI

1980
Extensive tests of space charge compensation, at the energy of.8 GeV, in similar conditions to those of the e+e− configuration are reported. Stability regions, smaller in size than those observed in that configuration, are found to decrease rapidly with current. Up to the limit, the beam cross-section stays constant.
Le Duff, J., Level, M.P., Marin, P.C., Sommer, E.M., Zyngier, H.   +4 more
openaire   +2 more sources

The space charge due to corona

Electrical Engineering, 1948
A new technique for measuring the field strength and deducing the ion density about a wire in corona is needed. One such new method is measurement of a-c corona directly with a crystal galvanometer connected between two probe screens. The net space charge density was derived from the field strength curves in a single mathematical step, using Poisson's ...
openaire   +1 more source

Studies of localized space-charge waves in space-charge dominated beams

Proceedings Particle Accelerator Conference, 2002
The results of the experiments on localized space-charge waves are presented. This includes the generation and propagation of space-charge waves in coasting beams, the end effect on space-charge waves in bunched beams, and the application of localized space-charge waves to beam diagnostics.
J.G. Wang, M. Reiser
openaire   +1 more source