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  • 1
    Electronic Resource
    Electronic Resource
    Propagation of ion acoustic waves close to a plasma boundary (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 1390-1391 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is observed that the electron component of an ion acoustic wave vanishes at a point in the transitional layer between the plasma and the ion sheath at an extended plane boundary. For the first time we present qualitative evidence that the ion component of the wave propagates beyond this point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336485
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of reflectometer fluctuation measurements from experiment and two-dimensional numerical simulation (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3861-3870 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A comparison is made between the statistical properties of phase and power signals from a homodyne reflectometer on the STOR-M tokamak and simulated signals from a two-dimensional distorted surface model. Experimental results from edge density fluctuations show phase fluctuations of less than half a fringe with a Gaussian distribution and no phase ramping. Reflected power fluctuations are substantial (up to 45%) and are non-Gaussian distributed. Both phase and power signals display broadband turbulent frequency spectra with spectral indexes of −3.5. Fluctuations in the scattered electric field are calculated in the model using physical optics principles with a Gaussian reflectometer incident beam profile and structured surface distortions to replicate variations in the plasma cutoff layer. Simulation results display a wide range of features depending on three parameters, surface fluctuation amplitude, transverse wavenumber spectrum, and incident beam width. With the beam width fixed by the experiment (50 mm) and (realistic) fitted values of 1–2 mm for the root mean square fluctuation depth and 2 cm−1 for the k-spectral width—good agreement is found with the experiment. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147287
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of surface reflection coefficients via multiple reflection of microwaves (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2920-2928 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Multiple reflection of a microwave beam between a horn antenna and a smooth target in the antenna near field produces an interference effect in the received power. This effect can be described by modeling the antenna and target as a closely coupled system with "coherent'' reflection coefficients. This model shows better agreement with experimental data than models based on isotropic antenna "backscatter.'' Measurement techniques are derived from this new model, which permit, by sampling the interference pattern, the remote sensing of the reflection coefficient of an unknown surface. From the reflection coefficient the dielectric constant or surface roughness can be obtained. A simple diagnostic apparatus is described together with possible industrial/laboratory applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144578
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  • 4
    Electronic Resource
    Electronic Resource
    Observation of radio-frequency ion heating in a double plasma device (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1774-1781 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: When a sinusoidal voltage with an angular frequency in the range ωpi≤ω0≤10ωpi and an amplitude of 0≤A (Vrms)〈1.6Te (eV) is applied to the separating mesh of a double plasma device, the temperature of the ions passing through the mesh increases approaching that of the plasma electrons (Te(approximately-equal-to)Ti(approximately-equal-to)1 eV). The effective ion temperatures inferred from energy analyzer data are in good agreement with those obtained from the phase velocity of a small amplitude ion-acoustic test wave. The heating effect is largest at ω0(approximately-equal-to)1.5ωpi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860812
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  • 5
    Electronic Resource
    Electronic Resource
    Plasma boundary layer in the presence of fast primary electrons (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 1795-1799 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The fluid equations are solved for a three-component plasma in contact with a plane object whose surface is negatively biased or electrically floating. The plasma is assumed to consist of cold ions, fast monoenergetic primary electrons with isotropic velocities, and secondary electrons with a Maxwellian distribution. The rate of ionization is assumed to be proportional to the density of the primary electrons. For a certain range of plasma parameters multiple double layers are formed whose positions are quasiperiodic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866193
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  • 6
    Electronic Resource
    Electronic Resource
    Reflection of ion-acoustic waves from an ion sheath at a grid (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 846-851 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The reflection of continuous sinusoidal waves from a grid is investigated experimentally. It is found that the reflection coefficient has a distinct maximum in contrast to the prediction of the theory. The electron components of the incident and reflected waves are observed to vanish within the quasineutral layer close to the grid where the plasma density rapidly drops. Furthermore it is shown that the reflected wave is a downstream wave that propagates on the ion beam that originates on the other side of the grid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865941
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  • 7
    Electronic Resource
    Electronic Resource
    Reflection of cylindrical ion acoustic waves
    Amsterdam : Elsevier
    Physics Letters A 89 (1982), S. 82-85 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(82)90511-4
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  • 8
    Electronic Resource
    Electronic Resource
    Observation of slow and fast cylindrical soliton-like waves
    Amsterdam : Elsevier
    Physics Letters A 75 (1980), S. 211-213 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(80)90116-4
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  • 9
    Electronic Resource
    Electronic Resource
    Reflection of ion acoustic waves from positive and negative space charge sheaths
    Amsterdam : Elsevier
    Physics Letters A 100 (1984), S. 235-238 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(84)90770-9
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  • 10
    Electronic Resource
    Electronic Resource
    Observation of diverging cylindrical solitons excited with a probe
    Amsterdam : Elsevier
    Physics Letters A 58 (1976), S. 459-461 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(76)90483-7
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