37 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Plasma Ionized gases"  
Results: 1 - 24 next
open access

Electron Density and Collision Frequency Studies Using a Resonant Microwave Cavity as a Probe

Description: Electron densities and collision frequencies were obtained on a number of gases in a dc discharge at low pressures (0.70-2mm of Hg). These measurements were performed by microwave probing of a filament of the dc discharge placed coaxially in a resonant cavity operating in a TM₀₁₀ mode. The equipment and techniques for making the microwave measurements employing the resonant cavity are described. One of the main features of this investigation is the technique of differentiating the resonance sig… more
Date: May 1973
Creator: Freeman, Ronald Harold
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Acceleration of a Plasma by Time-Varying Magnetic Fields

Description: Abstract: An application of the magnetic mirror principle to the acceleration of a plasma is described. It is shown that an axially symmetric magnetic field which increases with time but decreases with distance along the axis can impart a net translational energy to a plasma. This effect on a plasma is contrasted with that arising from an impressed electric field, which is not effective in producing acceleration.
Date: December 6, 1954
Creator: Post, Richard F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Elimination of Microwave Reflections

Description: Abstract: "The reflections of microwaves from the walls of a plasma-containing vessel are studied. The probable cause of the reflections is discussed, and several suggestions are made for eliminating the reflections from the waveguide in the vessel and particularly from the pyrex vessel wall and copper tubing surrounding the pyrex. Quarter-wave-thick carbon-filled plastics or glasses having a very low vapor pressure room most promising when placed inside the pyrex cylinder. BaTiO3 appears to be… more
Date: February 1, 1955
Creator: Beard, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of Beam Inflection Tests

Description: "An experimental study has been made regarding the passage of a beam of 100-kV ions (H⁺ and H₂⁺) across a magnetic field by means of a crossed electric field." This experiment was designed to answer the following questions: "(1) Is there a limit to the current that will traverse a magnetic field by the action of a crossed electric field? If so, what is the limit? (2) Do difficulties arise in maintaining the electric field? (3) For the source employed, what is the angular divergence and current … more
Date: April 1, 1957
Creator: Linlor, William I., 1915-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preferential Pumping and Its Application to the P⁴ Experiment

Description: Report analyzing the "preferential removal of neutral gas from an incompletely ionized plasma in which the ionized particles are allowed to drift along magnetic field lines through a differentially pumped channel" and its relation to the P⁴ experiment. The report also analyzes the regenerative and non-regenerative losses of plasma by radial diffusion, as well as "considerations relating to the ultimate disposal of overflow plasma."
Date: June 14, 1957
Creator: Hall, Laurence S. & Gardner, Andrew L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Trajectory-Wise Analysis of Immobilized Plasma Including Electrons. Machine Calculations

Description: Abstract: "The trajectory analysis of an immobilized plasma has been generalized to include the presence of electrons having a far similar radius of gyration and, therefore, fitting readily into the broader scale structure established by the ions. This problem has been adapted to machine calculations and the results for various strengths plasmas have been calculated."
Date: March 25, 1955
Creator: Tonks, Lewi, 1897-1971 & Keirstead, Ralph
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Projection of Plasma Across a Magnetic Field (Revised)

Description: Report discussing the trajectories of blobs of plasma as it travels across a magnetic field. Various observations are made about the blobs, such as the fact that they are diamagnetic, and that they can be either elastically scattered from each other or form a compound entity with a possible toroidal structure. "It is believed that these blobs are actually stable configurations of plasma and magnetic field, having both diamagnetic moment and spin."
Date: November 10, 1955
Creator: Bostick, W. H.; Lasher, D. R; Finkelstein, David Ritz & McIntosh, V. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A button source of plasma

Description: From abstract: " This report describes the construction of a plasma source that projects deuterium and titanium ions and eletrons at speeds up to 2 x 10^7 cm/sec."
Date: April 24, 1956
Creator: McIntosh, Virgil G. & Bostick, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plasma Heating by Transit-Time Magnetic Pumping in Single-Transit Systems

Description: Report discussing the heating of a plasma which passes through a series of magnetic pumping cells by applying the second-order theory of transit-time heating developed by Berger and Newcomb. From abstract: "Transit-time magnetic pumping in single-transit systems seems to be a feasible method of increasing plasma energy by amounts of the order of a factor of 10."
Date: September 1956
Creator: Hall, Laurence S.; Gardner, Andrew L. & Edwards, Donald A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plasma Containment Configuration

Description: Report discussing a plasma containment configuration which appears to have no escape cone. From abstract: "Arguments are given to show how the containment process works, including experimental evidence deduced from published reports on "electromagnetic levitation."
Date: October 11, 1956
Creator: Linlor, William I., 1915-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dr. Johnson's Lectures to the ARC Research Group

Description: Abstract: "These notes were written from recordings of a series of lectures which Dr. Montgomery H. Johnson presented to the ARC Research Group of the University of California Radiation Laboratory, Livermore, during January, February and March of 1954. In the lectures he discussed plasma oscillations and the penetration of radiofrequency electromagnetic fields into plasmas. Dr. Johnson plainly did not attempt rigorous or exhaustive treatments of these subjects but rather contented himself for t… more
Date: November 1954
Creator: Roberts, John E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Immobilized Plasma in a Nonuniform Field : (IBM Machine Code Title "PLANOUNF1")

Description: Abstract: "The self-consistent equations have been found for a plasma which lies in a mainly unidirectional magnetic field, which has a circular symmetry and which has a harmonic variation in the direction of the magnetic field. The equations have been solved in two cases, 1) where the harmonic variation of the field is finite and the plasma is weak, and 2) where the plasma is strong but the harmonic variation of the field is weak. The configurations thus found can form an important starting po… more
Date: February 18, 1955
Creator: Tonks, Lewi, 1897-1971
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Initial Measurements on the Angular Distribution of Deuterium Plasma Produced by a Pulsed Spark Source

Description: Abstract: "The deuterium plasma which is ejected by a 6000-ampere pulsed current through a rail-type spark source has a yield in the forward direction which is a factor of 5 to 10 greater than that in the perpendicular direction. This effect is believed to be due to the magnetic propulsion of the plasma."
Date: March 24, 1955
Creator: Bostick, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microwave Interferometer Measurements for the Determination of Plasma Density Profiles in Controlled Fusion Experiments

Description: The following report demonstrates experimental verification of a method described in a previous paper--that involves measuring the dispersive microwave propagation coefficients simultaneously at several frequencies and comparing measured values with the values calculated for various distribution functions--and describes the procedure used to determine the distribution function in a sample laboratory plasma experiment.
Date: November 6, 1958
Creator: Wharton, Charles B. & Slager, Donald M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radial distribution of plasma in Astron's E-layer

Description: A report discussing a more general analysis of "the relation between plasma pressure in the Astron [Thermonuclear Reactor] and the magnetic field of the E-layer" which is described in UCRL-5032. The analysis given in this report has "no restriction to the exponential form and [satisfies] the condition that the pressure at the axis shall be zero."
Date: December 1, 1958
Creator: Tonks, Lewi, 1897-1971
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Important Parameters of the Plasma Diode

Description: From abstract: "A relationship is derived that predicts the power radiated from the cathode to the anode of the plasma diode. The radiated power loss predicted by this relationship for a tungsten cathode and a nickel anode at widely different temperatures is found to be five times greater than the prediction of the conventional relationship which assumes gray-body conditions."
Date: November 1959
Creator: Fox, Raymond
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Steady-state and Dynamic Probe Characteristics in a Low-density Plasma

Description: The problem with which this investigation is concerned is that of determining the steady-state and dynamic characteristics of the admittance of a metallic probe immersed in a laboratory plasma which has the low electron densities and low electron temperatures characteristic of the ionospheric plasma. The problem is separated into three related topics: the design and production of the laboratory plasma, the measurement of the steady-state properties of dc and very low frequency probe admittance,… more
Date: December 1970
Creator: Bunting, William David
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Gaseous Detonation : Bibliography

Description: This report is a bibliography divided into two sections: one that documents books and journal articles, the other containing classified and unclassified documents, that are based around gaseous detonation. These sources cover the period between 1941 to October of 1957.
Date: October 28, 1957
Creator: Maynard, G. R. & Frost, Fred
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Electrostatic Potential About an Atomic Nucleus in an Ionized Gas

Description: From introduction: "The object of this paper is to derive a simple approximate expression for the average potential about an atomic nucleus in an ionized gas. It was desired that the expression be simple in the sense that its analytic form would be convenient in Born approximation calculations. It was also desired that the results would be valid over a large range of temperature and density for all elements with perhaps the exception of those with low atomic number."
Date: June 1958
Creator: Kidder, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Collapse : The Shock Heating of a Plasma

Description: There have been numerous independent suggestions to use high speed shocks to heat deuterium gas to thermonuclear temperature (E. Teller, R.R. Wilson, H. Grad, W. Marshall)², and extensive experimental work in this field is being carried on by, e.g., Kolb³, and S. Janes⁴. Our own work in this field has been directed towards a fundamental understanding of the strong shock process in the limit of no particle collision, to find out if within this limit the ion heating following the passage of the s… more
Date: March 7, 1958
Creator: Colgate, Stirling A. & Wright, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen