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IEEE Transactions on Plasma Science

Issue 2 • Date June 1980

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Displaying Results 1 - 18 of 18
  • Table of contents

    Publication Year: 1980, Page(s): c1
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  • IEEE Transactions on Plasma Science

    Publication Year: 1980, Page(s): c2
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  • Editorial

    Publication Year: 1980, Page(s): 53
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  • Guest Editorial

    Publication Year: 1980, Page(s): 54
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  • Focused Beam Ray Tracing for Laser Fusion

    Publication Year: 1980, Page(s):55 - 60
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1119 KB)

    A method for modeling the finite size focal spot of a high intensity laser beam in terms of rays and a procedure for tracing the rays are described. The rays, which represent the beam, are normally distributed over the spot via a random walk prescription. The paths traveled by these rays in vacuum are given in terms of the cyclindrical coordinates r and z. We then describe a two-step procedure for... View full abstract»

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  • Theoretical Analysis of the Resonance Cone in an Inhomogeneous Magnetoplasma Column

    Publication Year: 1980, Page(s):60 - 63
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The three-dimensional behavior of the high-frequency resonance cone is investigated using an inhomogeneous slab magnetoplasma model under the quasi-static approximation and neglecting ion motion. The effects of finite ky and electron thermal motion are considered numerically, revealing that the cone angle is shifted to a slightly smaller angle and the reflection point is also shifted toward the hi... View full abstract»

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  • Wave Trajectories and Damping of Lower Hybrid Wave in Tokamak Plasmas

    Publication Year: 1980, Page(s):64 - 67
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (859 KB)

    Incident lower hybrid waves (LHW) propagate toward the center of the plasma in a spiral form in the poloidal and the toroidal sections, and finally are absorbed by the ion Landau damping (ILD) and/or the electron Landau damping (ELD) in accordance with the refractive index parallel to the magnetic field N¿, which is varied considerably along the trajectory because of the toroidicity and the rotat... View full abstract»

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  • Wave Trajectory and Electron Cyclotron Heating in Tokamak Plasmas

    Publication Year: 1980, Page(s):68 - 71
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (867 KB)

    Wave trajectories in high density tokamak plasmas are studied numerically. Results show that the ordinary wave injected at an appropriate incident angle can propagate into the dense plasmas and is mode-converted to the extraordinary wave at the plasma cutoff, is further converted to the electron Bernstein wave during passing a loop or a folded curve near the upper hybrid resonance (UHR) layer, and... View full abstract»

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  • Geometric Optics of Lower Hybrid Waves in Nonuniform Plasmas

    Publication Year: 1980, Page(s):71 - 77
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2414 KB)

    The propagation of lower hybrid waves in the presence of strong density and field gradient-produced refractive effects is studied in the geometric optics limit. Attention is focused on the electrostatic wave and the modification of the parallel wavenumber k¿ due to gradients. It is found that in cases where the gradients occur along the direction of the magnetic field the resulting decrease of kÂ... View full abstract»

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  • Ray Tracing near the Electron Cyclotron Frequency with Application to EBT

    Publication Year: 1980, Page(s):78 - 89
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3204 KB)

    The general problem of ray tracing in the electron cyclotron range of frequencies is addressed with the view of applying geometrical optics techniques to microwave heating in ELMO Bumpy Torus (EBT). It is shown that the usual formulation of geometrical optics breaks down at cyclotron resonance due to the large anti-Hermitian part of the dispersion tensor. A consistent eikonal expansion is presente... View full abstract»

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  • General Geometric Optics Formalism in Plasmas

    Publication Year: 1980, Page(s):90 - 95
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1266 KB)

    This paper exploits a general approach to geometric optics in inhomogeneous plasmas based on the properties of the local dielectric tensor ¿. We express ¿ in terms of its eigenvalues ¿j and eigenvectors ¿. Then to zeroth order in the geometric optics approximation the determinant D = ¿1¿2¿3 vanishes and the elements ¿j vanish separately in pairs or simultaneously. It is shown that this bra... View full abstract»

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  • Complex Ray Analysis for Plasmas

    Publication Year: 1980, Page(s):96 - 101
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1201 KB)

    An extension of ray tracing techniques is considered for a variety of cases in which the dispersion relation of the plasma medium is complex. The ray trajectories are permitted to begin and/or at least travel through complex space-time; the wave propagation process so characterized becomes significant only where the rays intersect real space-time. It is found that rules and guidelines can be estab... View full abstract»

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  • Deposition and Thermalization of Fusion Products in a Tokamak Plasma

    Publication Year: 1980, Page(s):101 - 110
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2129 KB)

    As suprathermal fusion products (fp's) slow down in a Tokamak, their average drift is inward. The effect that this drift has on the spatial distribution profile for suprathermals approaching thermal energies, on the energy distribution, and on the plasma heating profile, is examined for five reactor cases ranging from near-term low-current devices to conceptual power reactors. In-situ energy depos... View full abstract»

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  • Bragg Effects in Microwave Transmission through Stationary Plasma Structures

    Publication Year: 1980, Page(s):111 - 119
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2021 KB)

    We describe the first of a series of experiments designed to study, in a double-plasma (DP) device (3-cm) microwave Bragg scattering from stationary plasma structures, and from systems of plasma waves and "irregularities." This paper deals with Bragg effects in microwave transmission through stationary plasma density structures, consisting of a) a cylindrical plasma column, b) a single plasma slab... View full abstract»

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  • Current Density Profile Measurements in the Proto-Cleo Torsatron

    Publication Year: 1980, Page(s):120 - 124
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1504 KB)

    Current density profile measurements were obtained in the Proto-Cleo torsatron (R = 40 cm, a = 5 cm, I = 3, BT = 3 kG, n¿ ~ 1011 cm-3, Te ~ 20 eV) by using a small back-to-back flat double probe. Three different operating circuits used with this probe are presented, along with experimental results, all showing good agreement. Current is seen to flow only within the separatrix, in channels which f... View full abstract»

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  • A Fast Langmuir Probe Sweeping Circuit

    Publication Year: 1980, Page(s):124 - 126
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1325 KB)

    An inexpensive, simple, and fast Langmuir probe sweeping circuit is presented. This sweeper completes a probe trace in 1.4 ms and has a maximum probe current capability of 5 A. It is suitable for pulsemode plasma operation with density greater than 1012 ions/cm3. View full abstract»

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  • NPSS Sponsored Meetings

    Publication Year: 1980, Page(s): 126a
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  • An Invitation to Membership

    Publication Year: 1980, Page(s): 126-b
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IEEE Transactions on Plasma Sciences focuses on plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology.

 

 

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Editor-in-Chief
Steven J. Gitomer, Ph.D.
Senior Scientist, US Civilian Research & Development Foundation
Guest Scientist, Los Alamos National Laboratory
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