Results 251 to 260 of about 6,093,819 (293)

A note on the electron density profile at the surface of metals

Surface Science, 1981
Abstract A two step model of electron density profile at the surface of a metal is in use for the study of surface plasmas. The same model is used here to calculate surface energy and work function. The parameters in the model are determined by minimizing surface energy.
B.V. Paranjape, G.C. Aers
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Electron density spatial profiles of the DCP source

Spectrochimica Acta Part B: Atomic Spectroscopy, 1985
Abstract Electron densities are measured in the high current, analytical and intervening zones of a DCP whose operating parameters are systematically varied. Detailed N e distribution profiles are obtained for various sleeve flow, nebulizer flow, arc current and matrix concentration regimes.
Andrew T. Zander, Myron H. Miller
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Plasmaspheric extension of topside electron density profiles

Advances in Space Research, 2002
Abstract Topside electron density profiles measured onboard ISIS-1 and ISIS-2 (1969 to 1980) and IK—19 (1979 to 1982) are extended through the plasmasphere using Chasovitin's (1999) model describing the plasma density between the peak of the ionosphere and the plasmapause.
Tamara L. Gulyaeva, Xueqin Huang, Bodo W. Reinisch   +2 more
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Variational approximation of the electronic density profile at the surface of jellium

Physical Review B, 1988
A variational method not restricted to a given class of trial functions is proposed for obtaining the electron density minimizing the energy functional E[n] directly in the surface region of jellium. Remaining within the local-density approximation, the kinetic-energy contribution is considered as proposed by Kirzhnits.
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An infrared Schlieren interferometer for measuring electron density profiles

Plasma Physics, 1972
In rotationally symmetric plasmas one can determine the electron density profiles from refractive index effects, preferably by using infrared radiation. In this report the diagnostic value of schlieren techniques is compared to that of interferometry. As a very efficient diagnostic setup, a combined schlieren interferometer is introduced, which makes ...
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Ionospheric Electron Density Profile and Related Studies.

1981
Abstract : We have studied photo-ionization of the neutral gas by photons in the extreme ultraviolet (EUV) region of the solar spectrum along with the various particle-particle collisional processes that determine the energy dependence of the photo-electron flux.
Ed R. Smith, Tien S. Chang, Bamandas Basu   +2 more
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Electron density reference profile in the lower ionosphere

Advances in Space Research, 1985
Abstract The new IRI formula, as accepted at the 1983 Stara Zagora Workshop, prescribes the use of Epstein functions for reproducing logarithmic electron density profiles. In this paper we discuss solutions which might be applicable to the lower ionosphere. The experimental data base is briefly reviewed.
Y.V Ramanamurty, K Rawer
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Erratum: Evaluation of electron density profiles in plasmas from integrated measurements

Journal of Applied Physics, 1979
Obtaining electron density profiles from integrated measurements (e.g., those made with a multichannel interferometer) in the case of asymmetrical plasma distributions often entails serious difficulties. Here we describe a method applicable when the profiles are shifted along the equatorial plane and also when the relation between phase shift and ...
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A study on the cosmic electron density profile

2002
Abstract This paper shows a simulation process of retrieving ionospheric electron density from the Global Positioning System/Meteorology (GPS/MET) to examine the accuracy of the retrieval procedure for the COSMIC project 3 during solar minimum and maximum periods. Results show that the error of the maximum electron density ( NmF 2 ) is under 25%,
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Electron density profiles in the ionosphere during the I.G.Y.

Journal of Geophysical Research, 1958
In many parts of the world during the last 20 years, regular measurements have been made of the maximum electron density (Nm) and the approximate true height (hm) of the various layers in the ionosphere. Both these parameters can be obtained fairly easily from the h′(ƒ) curves (ionograms) which are produced by automatic pulse-sounding equipment and ...
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