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  • Articles  (4)
  • American Institute of Physics (AIP)  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Efficiency of chemical oxygen-iodine lasers: Theoretical simulation and experiment (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 42-48 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A theoretical study on the efficiency of chemical oxygen-iodine laser (COIL) oscillators is described together with experimental data obtained using an efficient COIL system. In order to evaluate chemical oxygen-iodine laser performance, three types of efficiencies (power conversion efficiency, extractable efficiency, and chemical efficiency) were introduced in this investigation. The dependencies of these efficiencies on initial gas components are investigated by theoretical simulation in which the theoretically attainable values of the efficiencies are also given. The validity of this simulation is confirmed by comparing the results with our experimental data. The experiments yielded a high-extractable power efficiency of 75%, which is comparable to the theoretically determined attainable value of 88%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336836
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Discharge properties of formed-ferrite plasma sources (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 787-791 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The discharge properties of a newly developed formed-ferrite plasma source intended for gas laser applications are described. The voltage-current characteristics of this new plasma source were measured as functions of the applied voltage ranging from 10 to 30 kV (corresponding to 100–900 J of input energy) for CF4 and Ar gases at atmospheric pressure and for N2 gas at pressures in the range of 1–760 Torr (133–1.01×105 Pa). The peak current through a plasma channel typically 7 cm in length reached 50 kA when the plasma source was driven by a 2-μF, 30-kV capacitor bank. The results obtained are of importance in order to understand the physical mechanism of the formed-ferrite plasma source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339733
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  • 3
    Electronic Resource
    Electronic Resource
    Characteristics of x-ray radiation by a nonequilibrium energetic electron flow emerged from a formed ferrite filament (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 5059-5063 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article reports the observation of intense x-ray emission by a nonequilibrium energetic electron flow that can be produced when an explosive formed-ferrite filament is used as a plasma initiator in a high vacuum of 10−5–10−3 Torr. Exposure dose measurements and pinhole photographs for the x-ray emission have shown that x rays originate linearly along a 14.5-cm filament with a high exposure dose level of 50 mR(mili-roentgen)/pulse at 6.5 keV, the predominant x-ray energy. The x-ray emission characteristics are described in terms of the time-resolved and -integrated observations in order to infer the x-ray emission mechanism in which an interaction between energetic electron flow and a cloud of ions or neutral atoms thermally produced from the filament has to be taken into account in the close vicinity of the filament.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347068
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  • 4
    Electronic Resource
    Electronic Resource
    Ultraviolet emission spectra from formed-ferrite plasma sources (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2514-2516 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Emission spectra from a high-current line plasma produced by means of a formed-ferrite plasma source have been measured in the ultraviolet spectral region 225–400 nm with emphasis on the ambient gas pressure dependence. A long distance, linear plasma of 13 cm was produced in a test chamber filled with CF4, N2, and Ar gases at various pressures ranging from 760 down to 10−5 Torr. The formed-ferrite plasma source was driven by a 2-μF capacitor bank charged at 15–25 kV. When the line plasma was created in a high vacuum of 10−5 Torr, several emission lines caused by singly ionized atomic species such as FeII and NiII which originated from the ferrite material appeared in the shorter wavelength region near 250 nm. This finding implies possible generation of vacuum ultraviolet, extreme ultraviolet, and soft x-ray photons based on the higher ionized atomic species by the formed-ferrite plasma source operating in such a high vacuum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341031
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