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Plasma Science, IEEE Transactions on

Issue 2 • Date June 1982

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Displaying Results 1 - 17 of 17
  • [Front cover]

    Publication Year: 1982 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Transactions on Plasma Science

    Publication Year: 1982 , Page(s): c2
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    Freely Available from IEEE
  • Interconnected Linear Theta Pinches

    Publication Year: 1982 , Page(s): 65 - 73
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    Several closed configurations consisting of interconnected linear theta pinches are proposed which may considerably reduce their end losses. View full abstract»

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  • Inductive Store Pulse Compression System for Driving High Speed Plasma Implosions

    Publication Year: 1982 , Page(s): 73 - 81
    Cited by:  Papers (24)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1588 KB)  

    The Air Force Weapon Laboratory has investigated and developed inductive pulse compression techniques with fuse opening switches for driving high speed plasma implosions. Experiments have demonstrated the delivery of 7.5 MA to a 5-nH load in < 200 ns from an initial 1.9-MJ 2-¿s capacitor bank via inductive pulse compression. Circuit considerations dictate the overall energy efficiency while MHD considerations dictate overall implosion stability and thermalization time. Theoretical considerations along with initial experiment results are presented in this paper. View full abstract»

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  • Computerized Tomography for Sparse-Data Plasma Physics Experiments

    Publication Year: 1982 , Page(s): 82 - 93
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    Matrix inversion and least squares fitting have been used to recover two dimensional distribution functions from a small number of line integrals taken along chords across them. A self-consistent optimization procedure, free from reliance on comparison with a trial source function, for optimizing the configuration of these chords is described and used to demonstrate that an asymmetric arrangement usually leads to greater reconstruction accuracy than a regular array. Smoothing is incorporated by imposing auxiliary conditions relating to the second derivative ¿2f of the source function f, and its effect on reconstruction accuracy and resolution is investigated. These methods are applied to the ten-channel far-infrared interferometer being prepared for use on JET. Electron denisty contour shapes can be identified rather sensitively if the source function contours belong to a predetermined family. View full abstract»

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  • Laboratory Observation of a Very Low Frequency Instability in an Argon Plasma

    Publication Year: 1982 , Page(s): 94 - 98
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    Very low frequency (50 to 500 Hz) self-excited electrostatic waves are detected in a cylindrical argon plasma column with a weak axial magnetic field (10 to 100 G). The waves propagate azimuthally with a phase velocity in the electron diamagnetic drift direction, but with a speed at least an order of magnitude less than the ion acoustic speed. A number of known plasma instabilities are considered as possible explanations, though most of them do not seem to account for the observed characteristics of the waves. View full abstract»

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  • Improvement of Plasma Radial Position Control in PDX through an Automated Learning Procedure

    Publication Year: 1982 , Page(s): 99 - 105
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    A procedure has been developed to calculate improved reference waveforms for the radial position feedback control system of the PDX tokamak. The procedure uses the data from previous discharges in calculating the reference waveforms, correcting for position errors, and including compensation for field penetration and power supply response. The results obtained in PDX divertor discharges are presented. View full abstract»

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  • Analysis of Modern Optimal Control Theory Applied to Plasma Position and Current Control in TFTR

    Publication Year: 1982 , Page(s): 105 - 115
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1824 KB)  

    The strong compression TFTR discharge has been segmented into regions where linear dynamics can approximate the plasma's interaction with the OH and EF power supply systems. The dynamic equations for these regions are utilized within the linear optimal control theory framework to provide active feedback gains to control the plasma position and current. Methods are developed to analyze and quantitatively evaluate the quality of control in a nonlinear, more realistic simulation. Tests are made of optimal control theory's assumptions and requirements, and the feasibility of this method for TFTR is assessed. View full abstract»

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  • Stimulated Raman and Brillouin Scattering of a Circularly Polarized Gaussian EM-Beam in a Magnetoplasma

    Publication Year: 1982 , Page(s): 115 - 119
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (674 KB)  

    In the present paper we have studied the nonlinear interaction of a Gaussian EM-beam with the electron and ion waves in a collisionless magnetoplasma, and the resulting stimulated Raman and Brillouin scattering. The EM-beam is assumed to be propagating along the static magnetic field as a right/left handed circularly polarized mode. The spatial amplification factors and the temporal growth rates are found to be significantly modified in contrast to a uniform pump. View full abstract»

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  • The Gyrac: A Proposed Gyro-Resonant Accelerator of Electrons

    Publication Year: 1982 , Page(s): 120 - 129
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1961 KB)  

    An analysis of the relativistic electron motion at electron cyclotron resonance (ECR) condition in a magnetic field which is gradually growing in time is accomplished. The results show the existence of a strong mechanism (basically nonrelativistic) which automatically maintains the phase stability during the gyro-resonant acceleration. The conditions in which the gyro-resonant acceleration (up to arbitrarily high energies) is possible are established. The conceptual design of a gyro-resonant accelerator (Gyrac) is proposed. The parameters of possible Gyrac devices for the energies of 5 GeV, 1 GeV, 100 MeV, and 10 MeV with peak powers of accelerated electron bunches (e-vortex) correspondingly 2.5 TW, 0.5 TW, 25 GW, and 0.4 GW are given. View full abstract»

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  • Instabilities and Statistical Behavior of Low Current Cold Cathode Arcs

    Publication Year: 1982 , Page(s): 130 - 135
    Cited by:  Papers (4)
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    This paper presents a study of instabilities and of spontaneous extinctions which occur in low current dc arcs between metal electrodes. A theoretical model for the behavior of emitting sites on the cathode surface is proposed. This model explains experimental results obtained in arc duration measurements and arc noise correlation. The model yields figures for site life time and elementary current of emitting sites. These values are compared with those given by other authors. The proposed model can be applied to explain arc duration and related erosion occuring in telecommunication relays and circuit breakers. View full abstract»

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  • The Effect of Decreasing Reflection Coefficient of Ion Acoustic Waves Using an Altemative Electric Field

    Publication Year: 1982 , Page(s): 135 - 136
    Cited by:  Papers (1)
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    An effect has been found, allowing one to vary smoothly the reflection coefficient of the ion acoustic wave from a negatively charged grid. View full abstract»

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  • Correction to "Theoretical Optimization of Stellarators"

    Publication Year: 1982 , Page(s): 137
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  • Xth International Symposium on Discharges and Electrical Insulation in Vacuum

    Publication Year: 1982 , Page(s): 138
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    Freely Available from IEEE
  • Research, Design and Development Engineers: Reduce Your Literature-Searching Time by up to 80%

    Publication Year: 1982 , Page(s): 138-a - 138-b
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    Freely Available from IEEE
  • Information for authors

    Publication Year: 1982 , Page(s): 138c
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    Freely Available from IEEE
  • Affiliate Plan of the IEEE Nuclear and Plasma Sciences Society

    Publication Year: 1982 , Page(s): 138-d
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    Freely Available from IEEE

Aims & Scope

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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