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  • 11
    Electronic Resource
    Electronic Resource
    Fabrication of thin-film-type Josephson junctions using a Bi-Sr-Ca-Cu-O /Bi-Sr-Cu-O/Bi-Sr-Ca-Cu-O structure (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 1469-1471 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin-film Josephson junctions with normal metal barriers using a Bi-based high Tc oxide superconductor were successfully fabricated. Bi2Sr2Ca1Cu2Ox films were used for both superconducting electrodes and Bi2Sr2Cu1Oy for the barrier layer. The junction area of 20×40 μm2 was defined by photolithography and Ar ion milling. These S/N/S-type junctions clearly exhibited the ac Josephson effect under the irradiation of radio frequency waves of 12 GHz and more than 20 Shapiro steps were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103173
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  • 12
    Electronic Resource
    Electronic Resource
    Energy modulation of nonrelativistic electrons in an optical near field on a metal microslit (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 4065-4069 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Energy modulation of nonrelativistic electrons with a laser beam using a metal microslit as an interaction circuit has been investigated. An optical near field is induced in the proximity of the microslit by illumination of the laser beam. The electrons passing close to the slit are accelerated or decelerated by an evanescent wave contained in the near field whose phase velocity is equal to the velocity of the electrons. The electron–evanescent wave interaction in the microslit has been analyzed theoretically and experimentally. The theory has predicted that electron energy can be modulated at optical frequencies. Experiments performed in the infrared region have verified theoretical predictions. The electron–energy changes of more than ±5 eV with a 10 kW CO2 laser pulse at the wavelength of 10.6 μm has been successfully observed for an electron beam with an energy of less than 80 keV. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1345851
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  • 13
    Electronic Resource
    Electronic Resource
    Dual homodyne detection system for measuring asymmetric spectra in the far-infrared regime (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 560-565 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A dual homodyne detection system for measuring scattered radiation from plasmas has been fabricated. The system is operative in the far-infrared regime, and with it the power spectral distribution of the scattered radiation in the upper and lower sidebands with respect to the frequency of the incident wave can be obtained. Theory of operation and experimental results for simulated radiation fields are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138871
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  • 14
    Electronic Resource
    Electronic Resource
    Hydrogen cyanide laser interferometer of the JFT-2M tokamak and feedback stabilization of the beat frequency using a microcomputer (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1290-1295 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A hydrogen cyanide laser interferometer with three vertical chords was installed in the JFT-2M tokamak for electron density measurement. The optical arrangment of the interferometer is a Mach–Zehnder type and its structure is mechanically independent of the JFT-2M machine in order to suppress the mechanical vibration. Two HCN lasers are employed for direct reading of the chord averaged electron density by means of beat modulation method. The beat frequency between two HCN lasers is stabilized at a constant frequency by a feedback circuit using a microcomputer. A combination of short dielectric waveguides and TPX lenses is employed to compensate the refraction and divergence of the laser beam. It was shown experimentally that the interferometric measurement of the electron density was scarcely affected by the mechanical vibration of the interferometer and the refraction of the probing laser beam up to n¯e=6×1019 m−3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138590
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  • 15
    Electronic Resource
    Electronic Resource
    Experimental verification of the theory on the inverse Smith–Purcell effect at a submillimeter wavelength (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 870-872 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The inverse Smith–Purcell effect is a candidate for laser-driven linacs utilizing the interaction between laser light and an electron beam traveling just in front of a metallic grating. We have performed experiments to study electron energy spread as a function of electron beam position above the grating. A submillimeter wave laser (CH3F, 496 μm) is used as a driving source. It is found that the energy spread characteristics show exponential decay of the interaction strength (field intensity) in the direction perpendicular to the grating surface, as a classical theory on the effect predicts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107773
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  • 16
    Electronic Resource
    Electronic Resource
    Transition of electron heating mode in a planar microwave discharge at low pressures (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 3523-3525 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spatial distributions of electron density ne, electron temperature Te, and wave field intensity in a planar microwave discharge at low pressures (10–100 mTorr) are measured with the discharge power as a parameter. Two different modes of electron heating are found: a bulk heating mode characterized with high Te(∼10 eV) in underdense plasma, and a surface heating mode with low Te(∼3 eV) in overdense plasma with a hot layer near the plasma-dielectric boundary. Abrupt transition between the two modes takes place near the cutoff density nc where the electron plasma frequency coincides with the discharge frequency (2.45 GHz). In the underdense case (ne〈nc), the microwave penetrates the bulk plasma and heats the majority of electrons confined in the dc ambipolar potential well, leading to high Te. In the overdense case (ne〉nc), the evanescent wave (surface wave) near the microwave window strongly heats the electrons in the boundary layer, which are transported to the bulk region and ionize the neutral particles to therein produce relatively cold electrons. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1329322
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  • 17
    Electronic Resource
    Electronic Resource
    Anomalous thermal electron heating and heat transport inhibition due to parametric instabilities (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 1150-1153 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements are presented of strong thermal electron heating and the heat transport inhibition. An electron plasma wave heats hot electrons near the critical density. A return current is induced to keep charge neutrality. Thermal electrons are heated strongly by the resistivity of parametrically excited isotropic ion wave turbulence (anomalous joule heating). The heat transport of thermal electrons is also inhibited by the resistivity. The experimental results agree reasonably well with theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859250
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  • 18
    Electronic Resource
    Electronic Resource
    Reply to "Comments on ‘Ion acoustic parametric decay instability in laser-produced plasma with varying ionic charge' [Phys. Fluids B 3, 1983 (1991)]'' (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 656-656 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The authors of the comment have correctly identified an area in which our paper is neither sufficiently clear nor fully correct. Unfortunately, we do not agree with their equations or their physical arguments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860499
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  • 19
    Electronic Resource
    Electronic Resource
    Density and temperature profiles in strongly absorbing plasma with distributed absorption (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 1241-1244 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A model is presented of the spatial structure of a laser-heated, strongly absorbing, planar plasma. Inverse bremsstrahlung is very strong so that laser light absorption is not localized. Absorption is distributed over densities from well below critical to the critical density. It is shown that the spatial structure of the plasma is self-consistent with laser energy deposition and heat transport so measurement of the plasma structure can be used as diagnostic of absorption and transport. Nonphysical discontinuities in density and temperature at the critical surface that are predicted by previous local absorption models for strongly flux-limited heat transport are reduced. These jumps persist in the present model. It is shown that an improved flux-limited heat transport model, strongly limited in the underdense plasma and weakly limited in the overdense plasma, results in continuous density and temperature profiles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859817
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  • 20
    Electronic Resource
    Electronic Resource
    Millimeter-wave phase-imaging interferometer for the GAMMA 10 tandem mirror (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2857-2861 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A millimeter-wave phase-imaging interferometer has been developed for the study of density profiles of the GAMMA 10 tandem mirror. The interferometer uses a 70-GHz klystron oscillator and a quasi-optical transmission system. The probe beam is expanded so as to fill an orthogonal view of a plasma cross section. The view is imaged onto a detector array. The detector array consists of beam-lead GaAs Schottky barrier diodes bonded to antennas fabricated using photolithographic techniques on a fused-quartz substrate. Two types of antennas, bow-tie and Yagi–Uda antennas have been used in order to provide an effective matching to millimeter-wave beams, and compared for the performance of an imaging system. The interferometers have been applied to the central-cell and plug-cell plasmas of GAMMA 10.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142172
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