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IEEE Transactions on Plasma Science

Issue 1 • Date Feb 1991

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Displaying Results 1 - 9 of 9
  • Determination of the characteristics of an electric arc plasma contaminated by vapors from insulators

    Publication Year: 1991, Page(s):1 - 8
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Results are presented from an experimental study (at atmospheric pressure) carried out on plasma penetrated by vapors from different industrial insulators. The data describe the influence of each insulator type upon the characteristics of the electric arc plasma, i.e. the resulting increase of the temperature, electronic density, electric field, and extinction velocity of the arc. Measurements wer... View full abstract»

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  • Kelvin-Helmholtz instability in a plasma with negative ions

    Publication Year: 1991, Page(s):42 - 46
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A dispersion relation for low-frequency electrostatic modes in a plasma with negative ions is derived for the case in which a velocity shear Kelvin-Helmholtz instability exists in the positive ion flow along the magnetic field. It is found that the negative ions have, generally, a destabilizing effect, as seen previously for ion-acoustic and electrostatic ion-cyclotron waves. The influence of the ... View full abstract»

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  • Plasma kinetic control in a tokamak

    Publication Year: 1991, Page(s):29 - 41
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    Plasma kinetic (temperature and density) control is developed in terms of optimal control theory. This involved solving a distributed parameter control problem for which no previous general theory or techniques could be practically implemented. The methodology used involves reducing the one-dimensional particle and energy transport partial differential equations into a system of ordinary different... View full abstract»

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  • Ion-cyclotron-resonance mass spectrometry with a microwave plasma source

    Publication Year: 1991, Page(s):47 - 51
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The feasibility of coupling an electron-cyclotron-resonance (ECR) plasma-processing reactor directly to an omegatron mass spectrometer is demonstrated. The ECR plasma is created in a chamber that is coupled to the omegatron through a small, grounded orifice. Ions created in the ECR chamber flow along the magnetic field into the omegatron analysis cell, and the mass spectrum of these ions is recove... View full abstract»

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  • Off-peak saturation effects of beam-plasma instability

    Publication Year: 1991, Page(s):52 - 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    For beam-plasma instability in the absence of a magnetic field, hybrid simulations produce almost identical results to those of particle simulations (both agree with linear and nonlinear analyses), but with much reduced computing cost and noise level. With the verification by simulations, it is shown that the saturation level is very strongly influenced by the discrete wave number spectrum, someti... View full abstract»

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  • Study of a circuit-breaker arc with self-generated flow. III. The post-arc phase

    Publication Year: 1991, Page(s):12 - 19
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    For pt.II see ibid., vol.16, p.615-22, 1988. The third part of this study of a circuit-breaker arc with self-generated flow concerns the model of the post-arc phase. The greater interruption capability of SF6 compared to N2, already suggested in pt.II, is confirmed by the following results: amplitude and duration of the postarc current are much lower in SF6 and the... View full abstract»

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  • Radiation guiding in a plasma wave wiggler free-electron laser

    Publication Year: 1991, Page(s):9 - 11
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The radiation guiding of a plasma wave wiggler free-electron laser (FEL) in the Compton regime was examined. It was found that a Langmuir wave supported by a plasma cylinder acts as a wiggler for the generation of high-frequency coherent radiation when an annular relativistic electron beam passes through it. The radiation mode in the Compton regime tends to be localized close to the radius of the ... View full abstract»

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  • Pressure dependence of plasma parameters in medium-vacuum nitrogen arc discharge with the titanium cathode

    Publication Year: 1991, Page(s):25 - 28
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The plasma properties of a medium-vacuum nitrogen arc discharge from a titanium cathode were studied. The arc chamber use was 400 mm in diameter and 600 mm in length. The cathode diameter and thickness were 64 and 25 mm, respectively. The experimental conditions are given as follows: pressure range=1×10-3~2×10-1 torr; N2 gas flow rate=6 ml/min; arc curr... View full abstract»

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  • On modes of arc cathode operation

    Publication Year: 1991, Page(s):20 - 24
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A review is given of the different modes of arc cathode operation. Arcs in a pressure range from UHV up to ⩾107 Pa and in a current range from 0.1 A up to 105 A are considered. Glow discharges are briefly mentioned for comparison. Typical conditions, parameters, and a phenomenological description of the different arc cathode modes are presented. Emphasis is put on the mai... View full abstract»

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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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Editor-in-Chief
Steven J. Gitomer, Ph.D.
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Guest Scientist, Los Alamos National Laboratory
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