Results 251 to 260 of about 1,564,578 (297)

Plasma density determination

IEEE Transactions on Antennas and Propagation, 1974
An approach to the indirect probing of inhomogeneous plane stratified plasmas is presented which, within numerical limitations, yields unique electron density profiles. It has been shown that the density profile and the reflected wave generated by a \delta - function incident electric field are uniquely related by a Fredholm integral equation.
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Bremsstrahlung in high-density plasmas

Physical Review A, 1985
Emission and absorption coefficients of bremsstrahlung by high-temperature partially degenerate electrons are calculated for high-density plasmas where Coulomb coupling between ions is not weak. It is shown that the ion correlation substantially reduces these coefficients.
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Electron density in low density capillary plasma channel

Applied Physics Letters, 2007
A low density plasma channel of 1017cm−3 is created in a capillary discharge. The plasma channel is characterized through the hydrogen plasma spectra in the Balmer Hα line. The measured plasma density profiles were found to be in qualitative agreement with the hydrodynamic simulations.
T. Palchan, D. Kaganovich, P. Sasorov, P. Sprangle, C. Ting, A. Zigler   +5 more
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Interferometric electron density measurements of high-density plasmas

Journal of Applied Physics, 1981
The effects of bending of the light beam due to density gradients on the interferometric density measurements of dense plasmas with various density profiles are estimated. It is indicated that in spite of the original smooth density profile the bending effects may result not only in quantitative errors but also in apparent density modifications such as
Y. Matsumoto, K. Koyama, M. Tanimoto, M. Sugiura   +3 more
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High density plasma source for plasma lens experiments

Proceedings of International Conference on Particle Accelerators, 2002
Experimental results of the study of a candidate source for high-energy particle beam underdense plasma lens experiments are presented. The high density plasma is based an the operation of the back-lighted thyratron. A 100% ionized hydrogen plasma with density of 1.7/spl times/10/sup 16/ cm/sup -3/ homogeneous in space and monotonically varying in time
K. Nakamura, R. Liou, M. Gundersen
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Plasma charge-density ratios in a dusty plasma

Journal of Applied Physics, 2000
It is shown that particle diffusion in the afterglow of a dusty plasma can be used to establish several properties of the active plasma. Specifically, the ratio of the average mass of light negative and positive ions, and a limit for the ratio of electron to ion charge densities can be determined. From the afterglow decay of visible particles, with and
M. A. Childs, Alan Gallagher
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Plasma wave propagation with a plasma density gradient

Physics of Plasmas, 2011
Plasma waves with the plasma diffusion velocity un due to a plasma density gradient are described in a positive column plasma. The ion wave is generated by the perturbation of the operating frequency 106 s−1 and it propagates with the group velocity ug∼cs2/un∼(105–106) m/s, where cs is the acoustic velocity in a fine tube fluorescent lamp, while the ...
Guangsup Cho, Eun-Ha Choi, Han Sup Uhm
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Microwave Plasma Density Measurements

Journal of Applied Physics, 1965
To make plasma density measurements on a cylindrical column with a microwave cavity requires a precise curve of cavity frequency versus density. In practice, one uses the measured cavity frequency (without a plasma) and the initial slope of this curve. An analysis is made for the TM010 mode to determine the effects of nonuniformity (a parabolic density)
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Immunoassay of Plasma Low-Density Lipoproteins

Science, 1970
An immunoassay was developed for determining the concentration of the protein moiety of the low-density lipoproteins of human plasma. The concentration of this protein in the plasma was variable; it was higher than normal on the average in patients with familial hyperbetalipoproteinemia (type II) and endogenous hyperlipemia (type IV) and lower than ...
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High current density plasma cathode

Applied Physics Letters, 1985
A grid-controlled plasma cathode has been operated at high current density (15 A/cm2) using vacuum insulator breakdown as the plasma source. The insulator spark generates a highly reproducible, 6-μs plasma pulse with density 1013 cm−3 at a distance of 6 cm. A number of sparks can be driven in parallel to supply large area plasma cathodes.
S. Humphries, M. Savage, D. M. Woodall
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