Results 21 to 30 of about 34,611 (309)

An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]

, 2005
International audienceWhen the Earth's ionosphere is irradiated by a radiofrequency (RF) electromagnetic wave of sufficiently high power density and tuned to match a natural E- or F-region plasma frequency, ionospheric magnetoionic wave modes may be ...
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., Belyey, Tereshchenko, Tereshchenko, E., Khudukon, B., Rietveld, M., Hoz, C. La, Belyey, Vasyl, Tereshchenko, E.D., Hagfors, Yurik, R. Yu., Khudukon, Yu. Yurik, Heinselman, C., Grill, Brekke, Belyey, V., Isham, B., Rietveld, Hagfors, T., Heinselman, Brekke, Asgeir, Rietveld, M. T., La Hoz, C., Isham, null La Hoz, Grill, M., Yurik, Yu., null null, Yurik, R. Yu., Yurik, R., La Hoz, Cesar, Tereshchenko, E. D., La Hoz   +36 more
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Inactivation of Escherichia coli by atmospheric pressure plasma jet in water

Journal of Water and Health, 2022
The main aim of this work is inactivation of Escherichia coli in water using a laboratory-scale radio-frequency atmospheric pressure Argon plasma jet. This bacterium is widely present in the environment, especially in drinking water, and its pathogenic ...
Mehdi Bakhshzadmahmoudi, Nader Morshedian, Ahmad Mehramiz, Manijeh Kharaghani   +3 more
doaj   +1 more source

Modulation of radio frequency signals by ULF waves [PDF]

Annales Geophysicae, 2007
The ionospheric plasma is continually perturbed by ultra-low frequency (ULF; 1–100 mHz) plasma waves that are incident from the magnetosphere.
C. L. Waters, T. K. Yeoman, M. D. Sciffer, P. Ponomarenko, D. M. Wright   +4 more
doaj   +1 more source

Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic [PDF]

, 2005
International audienceHigh-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial optical emissions identical to ...
F. T. Djuth, T. Pedersen, A. Senior, Hughes, J., Gerken, E., E. Gerken, Marshall, R., Pedersen, T., Senior, A., McCarrick, M., R. Marshall, Djuth, F. T., Kosch, M. J., M. J. Kosch, D. Sentman, J. Hughes, M. McCarrick, Sentman, D.   +17 more
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Surface properties of stainless steel coated with plasma-modified gelatin films [PDF]

Polímeros
This study investigates the surface modification of gelatin films coated on stainless steel using radio-frequency plasma treatment, with a particular emphasis on O2-plasma.
Shih-Hang Chang, Chun-Yi Tseng
doaj   +2 more sources

Observations of Solar Type III radio bursts by Cassini/RPWS experiment [PDF]

Advances in Radio Science, 2020
In this study, we report on the occurrence of solar Type III radio bursts recorded by radio and plasma wave experiment (RPWS) experiment onboard Cassini spacecraft.
M. Y. Boudjada, A. Abou el-Fadl, P. H. M. Galopeau, E. Al-Haddad, H. Lammer   +4 more
doaj   +1 more source

Multi-instrument observations of nightside plasma patches under conditions of IMF Bz positive [PDF]

, 2008
Results are presented from two multi-instrument case studies showing patches of cold, long-lived plasma in the winter nightside ionosphere during times when the z-component of the Interplanetary Magnetic Field (IMF Bz) was positive.
H. R. Middleton, V. S. C. Howells, Wood, Alan, Pryse, SE, Howells, V. S. C., Howells, VSC, Middleton, Helen Rose, S. E. Pryse, Middleton, HR, Wood, AG, A. G. Wood   +10 more
core   +1 more source

Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]

, 2003
In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T., Kosch, M., Leyser, T., Kosch, Mike J., Rietveld, M., Leyser, T. B., Blagoveshchenskaya, N., Blagoveshchenskaya, N. F., Kornienko, V. A., Yeoman, T. K., Kornienko, V., Yeoman, T.   +11 more
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Science goals for a high-frequency radar and radio imaging array

Frontiers in Astronomy and Space Sciences, 2023
A medium and high-frequency antenna array for radar and radio imaging of the ionosphere is planned for installation in Aguadilla, Puerto Rico. Science goals include the study of space weather, radio propagation, meteors, lightning, and plasma physics ...
Brett Isham, Terence Bullett, Björn Gustavsson, Emil Polisensky, Christiano Brum, Christopher Fallen, Vasyl Belyey, Francisco Parra-Rojas, Leila Norouzi, Arturs Stramkals, Mehmet Baran Ökten   +10 more
doaj   +1 more source

Scattering of radio frequency waves by randomly modulated density interfaces in the edge of fusion plasmas

, 2021
Submitted for publication in Journal of Plasma PhysicsIn the scrape-off layer and the edge region of a tokamak, the plasma is strongly turbulent and scatters the radio frequency (RF) electromagnetic waves that propagate through this region.
Papadopoulos, A.D., Glytus, E.N., Ram, Abhay K., Hizanidi, K.   +3 more
core   +1 more source