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Sunday, August 9, 2020 | History

2 edition of experimental investigation of the interaction of plasmas with antennas found in the catalog.

experimental investigation of the interaction of plasmas with antennas

William Clifford Taylor

experimental investigation of the interaction of plasmas with antennas

by William Clifford Taylor

  • 319 Want to read
  • 9 Currently reading

Published by National Aeronautics and Space Administration; [for sale by the National Technical Information Service, Springfield, Va.] in Washington .
Written in English

    Subjects:
  • Antennas (Electronics),
  • Plasma diagnostics.,
  • Shock tubes.

  • Edition Notes

    Statementby W. C. Taylor.
    SeriesNASA contractor report, NASA CR-1727, NASA contractor report ;, NASA CR-1727.
    ContributionsStanford Research Institute., Langley Research Center.
    Classifications
    LC ClassificationsTL521.3.C6 A3 no. 1727
    The Physical Object
    Paginationviii, 57 p.
    Number of Pages57
    ID Numbers
    Open LibraryOL4855040M
    LC Control Number75610656

    The experimental values show good agreement with molecular dynamics simulations. Investigation of magnetized dusty plasmas in the laboratory and near-earth space environment. The field of dusty plasmas has become a vigorous and established area of research for a number of decades now.   Plasma column is excited by surface wave, which acts as a plasma antenna. Antenna parameters of plasma antenna and equivalent metallic copper antenna are studied. By changing the operating parameters a single plasma antenna (plasma column) can be transformed into multiple antenna elements (striations), which can be treated as a phased array.

    We propose a general concept of quantum antenna in the strong coupling regime. It is based on the theory of open quantum systems. Antenna emission into space is considered an interaction with a thermal photonic reservoir. For antenna dynamics modeling, we formulate master equations with a corresponding Lindblad super-operators for the radiation. Introduction The Beating Wave Experiment (BWX) investigates what is potentially a very efficient method of energizing (or heating) plasma with electrostatic (ES) area of application for such a heating mechanism is in plasma propulsion. However, before any specific application is found, it is essential to investigate and understand the fundamentals of the wave-particle interaction.

      Abstract: This paper describes experimental investigations focused on the glow discharge created by a plasma actuator and used to shock wave modification over a flat plate in a Mach 2 air flow. The model is equipped with a plasma actuator composed of two electrodes. A weakly ionized plasma is created above the plate by generating a glow discharge with a negative dc potential applied . Fundamental Plasma Antenna Theory. Plasma Antenna Windowing (Foundation of the Smart Plasma Antenna Design). Smart Plasma Antenna Prototype. Plasma Frequency Selective Surfaces. Experimental Work. Other Plasma Antenna Prototypes. Plasma Antenna Thermal Noise. Current Work Done to Make Plasma Antennas Rugged. Latest Developments on Plasma Antennas.


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Experimental investigation of the interaction of plasmas with antennas by William Clifford Taylor Download PDF EPUB FB2

Theoretical and experimental investigation of plasma antenna characteristics on the basis of gaseous collisionality and electron density Teruki Naito 1*, Shingo Yamaura2, Kazuo Yamamoto, Tai Tanaka 2, Hidetoshi Chiba, Hayato Ogino3, Kazuhiro Takahagi 4, Shinya Kitagawa4, and Daiki Taniguchi 1Advanced Technology R&D Center, Mitsubishi Electric Corporation, Amagasaki, HyogoCited by:   A plasma antenna is a RF antenna partially composed of plasma instead of metals or dielectrics.

There are several types of antenna structures such as pole, 1 – 3) loop, 4 – 7) reflection, 8) and plane. 9) In most cases, the plasma antenna is composed of a dielectric tube filled with low-pressure gases, and plasma is generated by electric power fed at the end of the by:   Explosion-produced plasma jets formed in free spece are experimentally investigated.

The feasibility of emitting pulsed electromagnetic signals by plasma jets is shown, and the emitting conditions are studied. Comparison is made between the results of experiments with short and long plasma jets.

When the jet passes through the field of a helix, a short-term increase in the emitted Cited by: 3. In a laboratory plasma experiment the radiation pattern of electric dipole and magnetic loop antennas is determined experimentally in the whistler frequency range for different plasma parameters.

The spatial distributions of electromagnetic energy density for plasma antenna are given in Fig. 3 with the incident frequency of GHz and the plasma frequency of GHz.

As shown in Fig. 3(a)–(c), the electromagnetic energy are almost reflected by the plasma material at ν c = GHz. On the surface of plasma antenna, the reflected energy density is about 28 times that of the incident Author: Wenxuan Shi, Bin Yuan, Junfa Mao, Chao Wang.

Rayner [2] and Kumar [3] further examined the current and conductivity distributions, power patterns, directivity and efficiency of such a plasma column antenna by experimental observations. And. This will reduce the gap between the antenna and the plasma and hence increase coupling to the plasma.

The two antennas should reduce the power density under the ceramic ICH window and serve to reduce the currents and voltages on each antenna by increasing antenna loading. The cooling of the antenna is the same as for the helicon antenna.

This paper deals with the experimental investigation on the MHD (magneto-hydro-dynamic or magneto-fluid-dynamic) interaction around a test body immersed into a hypersonic unseeded air flow.

The experiments have been carried out in the CIRA plasma wind tunnel SCIROCCO. Two test conditions have been utilized for the experiments with a total pressure of and bar respectively.

E.8 Experimental Investigation of a Linear Van Atta Reflector E.9 Beam Scanning by a Dual-Mode Horn Antenna E The Optimization of the Radiation Characteristics of an Open-Ended Waveguide E On the Synthesis Problem for an Infinite Cylinder with an Axial Slot E An Analysis of Surface Wave Antennas E The "Backfire": A High Gain Cavity.

working on smaller plasma devices, it is expected that this conference will, as in the past, serve to identify possibilities and means for continuous and effective international collaboration in this area. The 26th IAEA Fusion Energy Conference is being organized by the IAEA in coop-eration with the National Institute for Fusion Science, Japan.

We have had the following experimental demonstrations of plasma antennas. Transmission and Reception: We have demonstrated transmission and reception of operating plasma antennas over a wide frequency range ( MHz–20 GHz). The surprising results were that the efficiencies are comparable to a copper wire antenna of the same configuration.

Stealth: When de-energized, the plasma antenna. O Kinetic simulations of plasma jets interaction with increasing magnetic fields investigation of plasma detachment through magnetic nozzle P High voltage pulses circuit for generating a plasma plume at atmospheric pressure. O.S. Stoican. 88 P Experimental set-up for the interaction of electron beams with complex plasmas.

The plasma antennas offer a new solution to new requirements that are imposed on antenna systems with the advancing communication technology and increasing demand on wider frequency bands. In this thesis the plasma antennas are investigated for the radar and communication applications.

The interaction of gas and. We have investigated the spatial distributions of plasma and near antenna fields operating in a rarefied gas in the corona formation regime. We have recorded and analyzed the effect of co-localization of the plasma and the near antenna field producing the corona.

Markov, G.A., Umnov, A.L. Experimental investigation of plasma-field co. The thruster is composed of an antenna to create the plasma, a cylinder to contain the plasma, and grids to extract the plasma beam at high velocity. In this work, the development of the inductively coupled plasma (ICP) antenna in LTCC will be presented.

This antenna is. The plasma antenna is an emerging technology and is a type of radio antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna.

A plasma can be used for both transmission and reception. Although plasma antennas have only become practical in recent years, the idea is not new; a patent. Investigation on broadband propagation characteristic of terahertz electromagnetic wave in anisotropic magnetized plasma in frequency and time domain Physics of Plasmas, Vol.

21, No. 12 Measuring the Time-Varying Channel Characteristics of the Plasma Sheath From the Reflected Signal. Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.

Previous theoretical work has shown that a parametric interaction between electrostatic lower oblique resonance (LOR) and ion acoustic waves (IAW) can produce electromagnetic whistler waves in a cold magnetized plasma.

It was also demonstrated theoretically that this interaction can more efficiently generate electromagnetic whistler waves than by direct excitation using a conventional loop. Singh and Jinto Thomas Experimental investigation of oscillatory structures in laser-blow-off plasma plume, Physics Letter A,(), ISSN/ISBN: Rajneesh Kumar and Dhiraj Bora,Wireless communication capability of a reconfigurable plasma antenna Journal of Applied Physics, (6), (), ISSN/ISBN:.

@article{osti_, title = {Faraday shield effects on a half-turn loop antenna used for ICRF plasma heating}, author = {Sawaya, K and Adachi, S and Sato, Y}, abstractNote = {Characteristics of a half-turn loop antenna having a Faraday shield have been systematically investigated.

The main interest is to clarify the Faraday shield effects on the near-zone electric field [email protected]{osti_, title = {Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements}, author = {Dey, Indranuj and Toyoda, Yuji and Yamamoto, Naoji and Nakashima, Hideki}, abstractNote = {A miniature microwave plasma source employing both radial and axial magnetic fields for plasma confinement .Plasma Antennas - 2 - I.

INTRODUCTION On earth we live upon an island of "ordinary" matter. The different states of an investigation of the wider technical issues of existing antenna systems has revealed areas where plasma antennas might be useful.

The project attracts the interest of the industrial groups involved in such experimental.