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Saturday, May 9, 2020 | History

2 edition of Radial diffusion of resonant particles in tandem mirrors found in the catalog.

Radial diffusion of resonant particles in tandem mirrors

Yung-Chang Lee

Radial diffusion of resonant particles in tandem mirrors

by Yung-Chang Lee

  • 273 Want to read
  • 3 Currently reading

Published by Dept. of Energy, [Office of the Assistant Secretary for Defense Programs], Lawrence Livermore Laboratory, for sale by the National Technical Information Service] in [Livermore, Calif.], [Springfield, Va .
Written in English

    Subjects:
  • Particles (Nuclear physics),
  • Diffusion

  • Edition Notes

    Statementby Yung-Chang Lee
    SeriesUCID ; 17992
    ContributionsUnited States. Dept. of Energy, Lawrence Livermore Laboratory
    The Physical Object
    Pagination28 p. :
    Number of Pages28
    ID Numbers
    Open LibraryOL14884630M

    Lenzi, E. K., et al.: Solutions for a Fractional Diffusion Equation with Radial Symmetry and S2 THERMAL SCIENCE, Year , Vol. 19, Suppl. 1, pp. S1-S6 and/or desorption on a surface in contact with the particles present in the bulk. It can also re-cover the usual Robin boundary condition and be related to a reaction process [28]. Values deduced for the diffusion coefficient vary from × 10 −5 R E ²/day at L = to R E ²/day at L = 5. In the interval Cited by:

    Chapter 7 The Diffusion Equation The diffusionequation is a partial differentialequationwhich describes density fluc-tuations in a material undergoing diffusion. The equation can be written as: ∂u(r,t) ∂t =∇ D(u(r,t),r)∇u(r,t), () where u(r,t)is the density of the diffusing material at location r =(x,y,z) and time t. A Simple Analytical Model for Radial Diffusion of Charged Particles in the Magnetospheres of Jupiter, Saturn, and Uranus: Authors: Gubar, Yu. I. Affiliation: AA(Skobeltsyn Institute of Nuclear Physics, Moscow State University, Vorob'evy gory, Moscow, Russia) Publication: Cosmic Research, v. 39, Issue 1, p. (). (CosRe Homepage).

    Thus, diffusion should not be confused with convection or dispersion, which are other transport mechanisms that use bulk motion to move particles from one place to another. 2. Gedanken Experiment Paul Berg’s book “Random Walks in Biology” (1), describes a useful thought experiment that illustrates the diffusion Size: KB. Chapter 2 DIFFUSION The Diffusion Equation Formulation As we saw in the previous chapter, the flux of a substance consists of an advective component, due to the mean motion of the carrying fluid, and of a so-called diffusive component, caused by the unresolved random motions of the fluid (molecular agitation and/or turbulence).File Size: KB.


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Radial diffusion of resonant particles in tandem mirrors by Yung-Chang Lee Download PDF EPUB FB2

The radial diffusion of resonant particles in the banana regime and the plateau regime is derived in detail from kinetic theory. The plateau diffusion, calculated in the tau approximation, is discussed in relation to the result given by Ryutov-Stupakov.

The banana diffusion which agrees with the R-S result provided the latter is corrected for some dependence of the collision frequency on.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Abstract. Mechanisms leading to loss of alpha particles from non-axisymmetric tandem mirrors are considered. Stochastic diffusion due to bounce-drift resonances, which can cause rapid radial losses of high-energy alpha particles, can be suppressed by imposing a 20% rise in axisymmetric fields before the quadrupole transition sections.

Flow reactors, denuders, and sampling tubes are essential tools for many applications in analytical and physical chemistry and engineering. We derive a new method for determining radial diffusion effects and the penetration or transmission of gas molecules and aerosol particles through cylindrical tubes under laminar flow conditions using explicit analytical by:   The results are valid for resonant interactions with any mode of weak plasma turbulence, with wave energy distributed over any range of frequencies and wave normal angles.

Simple relations are found between the diffusion coefficients, these relations reflecting the geometry of the diffusion surfaces for resonant by: Abstract. The radial diffusion of equatorially mirroring particles (J = 0) is considered for Jupiter.A steady-state phase-space density distribution is obtained for (i) source-loss-free diffusion; (ii) diffusion with synchrotron radiation losses only and (iii) diffusion with synchrotron radiation plus the resonant wave-particle interaction : E.

Rennan Pekünlü. Radial diffusion can be implemented in rxd using multicompartment reactions. By creating a series of shells and borders with reactions between them dependent the diffusion coefficient.

In [1]: from neuron import h, rxd from import nM, uM from matplotlib import pyplot import numpy _file('') Out[1]: Create the NEURON, in this case a simply.

Introduction. The quantification of mass transfer between porous particles and a surrounding bulk aqueous phase is needed in many hydrological applications, including cases involving particles suspended in surface water, in riverine/estuarine sediment beds, in soils and in aquifer materials One of the most common models to simulate rate-limited mass transfer between the intra-particle and Cited by: 1.

Resonant neoclassical radial drift loss in quadrupolar mirrors has been predicted to be a major drawback for applying a stabilizing quadrupolar field to mirror machines, and this fear has been an argument to focus on axisymmetric mirrors.

However, our calculations suggest that this type of loss can be eliminated with biased by: 3. Evidence is given that the presence of an open ion cyclotron resonance layer in a tandem mirror can result in enhanced radial ion transport.

Radial diffusion induced by an ion cyclotron resonance layer in the Phaedrus‐B tandem mirror: Physics of Fluids B: Plasma Physics: Vol 4, No 4Author: M. Ichimura, Yun‐Jian Wen, D. Brouchous, R. Breun, N. Hershkowitz, P. Probert, R.

Majeski, T. Walt M. () Radial Diffusion of Trapped Particles. In: McCormac B.M. (eds) Particles and Fields in the Magnetosphere. Astrophysics and Space Science Library (A Series of Books on the Recent Developments of Space Science and of General Geophysics and Astrophysics Published in Connection with the Journal Space Science Reviews), vol Cited by: arbitrary pitch angle has been used by Jentsch [] to study the radial distribution of radiation belt protons.

A summary of observational evidence on radial diffusion of geomagnetically trapped particles was given by Roederer [a].

The theoretical and experimental values of the radial diffusion. Radial constant of motion for particles in magnetic mirror fields Article in Plasma Physics and Controlled Fusion 56(9) August with 26 Reads How we measure 'reads'.

Many works have been done during the past 40 years to perform the analytical solution of the radial diffusion equation that models the transport and loss of electrons in the magnetosphere, considering a diffusion coefficient proportional to a power law in L shell and a constant loss term.

In this paper, we propose an original analytical method to address this challenge with a nonuniform loss by: 3. Particles diffusion in a larger domain than the one where they were initially loaded, done using modified dsmcFoam solver. Solid lines: complete numerical solution. Dashed lines: theoretical, no axial diffusion.

The effect of radial diffusion on penetration of airborne particles through a radial-flow sampler without a transverse velocity component, gave approximately the same results and are represented by the same solid line in Cited by: 1.

APh – Biological Physics Laboratory Diffusion of Solid Particles Confined in a Viscous Fluid1 I realize that some of you have little or no experience with partial differential equations (PDEs). However we think it is important to understand the nature of the diffusion File Size: KB.

Khvesyuk v'I' el a/., Analysis of Influence of the Radial Electric Field on Turbulent Transport in a Tandem Mirror plasma dependent sensitively on radial profile of plasma potential. Following results are especially important for justification of the physical model of low-frequency drift excitation of the non-uniform low-B magnetized plasma.

Firstly, phase velocity of the observed waves is. Since there is no dependence on angle Θ, we can replace the 3D Laplacian by its two-dimensional form, and we can solve the problem in radial and axial the flux is a function of radius – r and height – z only (Φ(r,z)), the diffusion equation can be written as:The solution of this diffusion equation is based on use of the separation-of-variables technique, therefore.

Radial diffusion method for determining tannin in plant extracts. Hagerman AE(1). Author information: (1)Department of Chemistry, Miami University,Oxford, Ohio. Tannin in plant extracts can be determined by reacting the tannin with a protein and quantitating the precipitated by:.

The flute instability and the associated radial transport are investigated in the tandem mirror with a divertor mirror cell (the GAMMA10 A-divertor) with help of computer simulation, where GAMMAAlpha particle density and energy distributions in tandem mirrors using Monte-Carlo techniques Thesis/Dissertation Kerns, J.A.

Alpha particles, born at MeV, are used to maintain the ignition temperatures in a deuterium-tritium (D-T) reacting plasma above 10 keV in tandem mirror reactors.The radial diffusion method (Hagerman J. Chem. Ecol. 13, ‐, ) is a particularly simple protein precipitation method and is appropriate for situations where laboratory facilities are limited or numerous samples must be analyzed.

Unlike other protein precipitation methods, acetone does not.