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Trapping of Energetic Ions by Neutralization of a Polarized Beam

Description: Recent experiments show that a positive ion beam with a density exceeding 10/sup 8/ ions/cm/sup 3/ will neutralize its space charge by trapping electrons within the beam. This trapping of electrons converts the ion beam to a neutral plasma suitable for injection and polarization experiments in a cross magnetic field. The ion energy used is about 500 volts. The beam moves readily across the magnetic field due to polarization of positive and negative charges. To create a hot plasma, it will be ne… more
Date: March 17, 1959
Creator: Luce, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Equilibrium Configuration of a Plasma in the Guiding Center Limit

Description: "We compute the equilibrium configuration of a collision-free plasma contained in an axially symmetric magnetic field. The plasma is characterized by a non-scalar pressure tensor which is obtained from a microscopic distribution function in a form suggested b the guiding center approximation. The solution is calculated in the limit where the ratio of the width to the length of the plasma region and the ratio of the gas to the magnetic pressure are both small. Boundary values at the midplane … more
Date: September 15, 1960
Creator: Oppenheim, Alan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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5.6 Mass Spectrographs

Description: In recent years German physicists have been making increasing use of both mass spectrographs in the stricter sense and mass spectrometers which can only measure elative isotopic abundances and use electrical methods of measurement.
Date: unknown
Creator: Evald, H. & Marschall, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experiments With Pulsed Magnetic Cusps

Description: Experiments with a simple pulsed magnetic field in cusped geometry are described. The plasma is generated inside the containment region rather than injected from an external source. It was found that creation of the plasma by a linear pinch discharge is most successful. Only qualitative studies have been carried out so far, using time-resolved visual observation of the plasma. Well-defined plasma bodies located in the central region between the cells were photographed. In order to make them cle… more
Date: May 26, 1960
Creator: Watteau, Jean-Paul H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects Of A Magnetic Field On Natural Convection In A Toroidal Channel

Description: The problem of the natural convection of an electrically and thermally conducting fluid within a long, narrow, vertical toroidal channel centered in a large block of an electrically and thermally conducting solid is analyzed. A uniform horizontal magnetic field is applied to the fluid, and the bottom of the solid block is maintained at a higher fixed temperature than the top. The laminar steady-state single-cell convective motion of the fluid is considered and an approximate solution is found f… more
Date: February 1961
Creator: Concus, Paul
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The "Near" Magnetic Induction Signal from a Nuclear Explosion Due to Movement of the Earth's Magnetic Field

Description: The "near" magnetic induction signal from a nuclear explosion in the earth's atmosphere due to movement of the earth's magnetic field is predicated upon the entrapment of the earth's magnetic flux in the air surrounding the bomb. The entrapment of the flux is due to the initial conductivity of the ionization created by gamma rays. The subsequent movement of the magnetic flux is determined by the hydrodynamics of the expanding fireball so that a spherical hole is blown in the magnetic field dist… more
Date: November 1960
Creator: Colgate, Stirling A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Choice of Electrical Conductor on Power Requirements of Low Temperature Magnets

Description: Introduction. As has been shown by Post, the total power required to produce a strong, steady-state magnetic field is strongly dependent upon the temperature at which the electrical conductor of the magnet operates. The power required for operation at very low temperature can, in some cases, be much less than that required for ambient temperature operation. The power required for low temperature operation depends on many system characteristics which include the metal chosen for the electrical… more
Date: November 13, 1959
Creator: Mallon, Richard G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of the Influence of the Form of the Magnetic Field on the Function of the Cyclotron

Description: This study enabled the author to analyse the operation of the cyclotron in great detail than it is possible by means of the elementary theory. Apart from the numerical results which one obtains and which make possible a predetermination of the characteristics to be used, the precise study of the phenomena which occur in the course of the accelerations helps towards a better physical understanding of these phenomena which is not to be regarded lightly,
Date: unknown
Creator: Debraine, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fifth Quarterly Progress Report on Fission Product Applications Using Gaseous Beta Sources

Description: "Rates of acetylene polymerization induced by Kr/sup 85/ in d-c fields were up to 15 times greater than those observed when no fields were imposed. Work to determine the relations between acetylene pressure, Kr/sup 85/ concentration, and the field intensity is continuing. In other activities, equipment is being designed to study the effects of megacycle electric fields on radioinduced chemical reactions."
Date: October 31, 1961
Creator: Graessley, William W. & Zufall, John W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Green's Function for Two-Dimensional Magnetohydrodynamic Waves. II

Description: "As an extension of an earlier paper the Green's function is evaluated for the Lundquist equation linearized about uniform magnetic field, constant matter density, and zero flow velocity. It is assumed that all quantities are functions of two space variables and time only. In the general magnetic field configuration considered here a pure Alfvén disturbance no longer exists; there is instead a wave with properties of both the Alfvén and fast‐slow disturbance."
Date: December 15, 1960
Creator: Weitzner, Harold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Motion of a Charged Particle Near a Zero Field Point

Description: "The behavior of charged particles in a plasma-free cusp field, or in a cusp field where there is very little plasma, is studied. The numerical computations described may provide a valid picture of the behavior of particles outside such a body of plasma or in the early stages of creation of such a cusped plasma in the low- beta limit. The computations provide a striking illustration of orbits which neither have constant magnetic moment nor behave so irregularly as to defy explanation."
Date: July 15, 1961
Creator: van Norton, Roger
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Boundary Layer Between a Plasma and a Magnetic Field - I

Description: "The problem of a steady boundary layer or sheath between a plasma and a magnetic field is considered. A self-consistent transition layer is found which joins a uniform magnetic field at plus infinity with a collisionless field-free plasma region with arbitrary velocity distribution at minus infinity, i.e., a magnetic field profile is found such that the exact particle orbits in this field produce a current which gives rise to this field. An interesting feature of the solution is that, with any… more
Date: December 28, 1960
Creator: Grad, Harold, 1923-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Containment in Cusped Plasma Systems

Description: "A survey of the current theoretical picture of plasma containment in cusped magnetic configurations is presented together with a mention of the points of contact which exist or might soon be made to exist with experiment. A theory of containment was developed which is applicable to the whole range of plasma densities from a tenuous plasma in an essentially vacuum magnetic field to a fully developed plasma which completely excludes the magnetic field from its interior. Also presented are cursor… more
Date: March 30, 1961
Creator: Grad, Harold, 1923-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Injection Trajectories and Beam Matching for the Cambridge Electron Accelerator

Description: "ABS>Injection trajectories were calculated for different injection conditions for the Cambridge Electron Accelerator, considering also the effect of magnetic fringing fields. The general problem of matching the emittance of the linac to the acceptance of the synchrotron in the transversal phase space is considered, and it is shown that this can be done by a set of two quadrupole lenses. In order to eliminate rudial betatron oscillations due to energy deviations of the injected particles, a pul… more
Date: April 17, 1957
Creator: Steffen, Klaus G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Exit Beam Trajectories for the Cambridge Electron Accelerator

Description: "A method is outlined for calculating the trajectories, through the magnetic field of the following magnet pair of positive and negative particles of different momenta produced in a target. Representative trajectories were computed by this method and are given numerically."
Date: January 30, 1958
Creator: Steffen, K. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrical and Optical Investigation of Charge-Carrier Trapping in Rutile Single Crystals

Description: "Low-frequency absorption centers, observed by electrical measurements in single crystals of rutile, can be produced by thermal quenching or optical irradiation in the edge of the eigen absorption region (600 A). They are observed when electric fields are applied parallel to the optic axis (crystallographic c axis) and are not visible with the field perpendicular to this axis. The temperature dependence of the principal dispersion indicates an activation energy of 0.18 ev. The centers can be ex… more
Date: unknown
Creator: Srivastava, K. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Temperature on the Width of a Small-Amplitude, Solitary Wave in a Collision-Free Plasma

Description: "Adlam and Allen and Davis, Lust, and Schluter have studied nonlinear plane-waves, propagating normal to the magnetic field, in a cold plasma. One solution of particular interest is a solitary wave, or single pulse. We present a method for solving the analogous problem for a plasma with finite temperature, in the limiting case where the amplitude of the wave is small and where, consequently, the width of the waver is very large."
Date: March 15, 1961
Creator: Gardner, Clifford S. & Morikawa, George Kiyoshi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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