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  • 1
    Electronic Resource
    Electronic Resource
    A field-reversal mechanism in a reversed-field pinch (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 1182-1191 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A field-reversal mechanism in a reversed-field pinch (RFP) is studied through a three-dimensional resistive compressible magnetohydrodynamic (MHD) simulation of the single- and multiple-helicity modes. As the magnetic Reynolds number increases, the m=1 fluctuating magnetic field grows exponentially and extends radially, and then the flow begins to form the vortex structure around the core of the plasma. This radial flow acts such as to push out the toroidal magnetic field. As the dynamo electric field induced by this interaction increases near the core of the plasma, the toroidal magnetic field at the wall decreases toward the negative value and the toroidal magnetic field reverses. As a result, it is found that the field reversal is achieved by the single-helicity evolution of the m=1 mode alone, without the (m=0; n≠0) modes, and the interaction of the radial flow and the toroidal magnetic field is the most dominant source for the dynamo action on the field-reversal process. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871396
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  • 2
    Electronic Resource
    Electronic Resource
    Spectral narrowing of an optically pumped high-power D2O laser using the oscillator-amplifier system (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 1378-1384 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spectrally narrow outputs of about 10 MHz (full width at half-maximum) are obtained from an optically pumped high-power (100 kW) D2O laser system by using the oscillator-amplifier configuration, in which a low-power single-mode output from a compact D2O laser with a short cavity length is amplified by a large D2O laser amplifier. In order to obtain spectrally narrow outputs from the amplifier, the following three conditions need to be satisfied: (1) the D2O gas pressure of the amplifier is adjusted in the range from 4 to 6 Torr; (2) the oscillation frequency of the compact laser is tuned in the range about 15–35 MHz lower than the Raman resonance frequency; and (3) the intensity of the compact laser beam injected into the amplifier is larger than about 50 W/cm2. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358949
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  • 3
    Electronic Resource
    Electronic Resource
    Injection seeding for single-mode operation in an optically pumped high-power D2O laser (1995)
    Springer
    International journal of infrared and millimeter waves 16 (1995), S. 2133-2146 
    Details
    ISSN: 1572-9559
    Keywords: injection seeding ; spectral narrowing ; optically pumped D2O laser ; high power ; numerical simulation ; semiclassical theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Spectrally narrow, pulsed outputs consisting of almost a single mode have been obtained from an optically-pumped high-power (200kW) D2O laser by adopting the injection seeding method, where single-mode radiation (seed pulse) from a low-power, compact D2O laser has been injected into the main D2O laser. Spectrally narrow outputs with high power having spectral widths as narrow as 5 MHz have been obtained, when the seed pulses with frequency tuned to one longitudinal mode of the main D2O laser have been injected at a time sufficiently before the lasing of the main laser took place. The experimental results have been compared with those of numerical simulation modified to include the injection field with varying injection times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02073415
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